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During some testing, it became evident that using IORING_OP_WRITE doesn't
hash buffered writes like the other writes commands do. That's simply
an oversight, and can cause performance regressions when doing buffered
writes with this command.
Correct that and add the flag, so that buffered writes are correctly
hashed when using the non-iovec based write command.
Cc: stable@vger.kernel.org
Fixes: 3a6820f2bb8a ("io_uring: add non-vectored read/write commands")
Signed-off-by: Jens Axboe <axboe@kernel.dk>
The attempt to find and activate a free worker for new work is currently
combined with creating a new one if we don't find one, but that opens
io-wq up to a race where the worker that is found and activated can
put itself to sleep without knowing that it has been selected to perform
this new work.
Fix this by moving the activation into where we add the new work item,
then we can retain it within the wqe->lock scope and elimiate the race
with the worker itself checking inside the lock, but sleeping outside of
it.
Cc: stable@vger.kernel.org
Reported-by: Andres Freund <andres@anarazel.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
* Various withdraw related fixes (freeze glock recursion, thread
initialization / destruction order, journal recovery, glock cleanup,
withdraw under journal lock).
* Some error message improvements.
* Various minor cleanups.
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Merge tag 'gfs2-v5.14-rc2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2
Pull gfs2 updates from Andreas Gruenbacher:
- Various withdraw related fixes (freeze glock recursion, thread
initialization / destruction order, journal recovery, glock cleanup,
withdraw under journal lock).
- Some error message improvements.
- Various minor cleanups.
* tag 'gfs2-v5.14-rc2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2:
gfs2: Remove redundant check from gfs2_glock_dq
gfs2: Delay withdraw from atomic context
gfs2: Don't call dlm after protocol is unmounted
gfs2: don't stop reads while withdraw in progress
gfs2: Mark journal inodes as "don't cache"
gfs2: nit: gfs2_drop_inode shouldn't return bool
gfs2: Eliminate vestigial HIF_FIRST
gfs2: Make recovery error more readable
gfs2: Don't release and reacquire local statfs bh
gfs2: init system threads before freeze lock
gfs2: tiny cleanup in gfs2_log_reserve
gfs2: trivial clean up of gfs2_ail_error
gfs2: be more verbose replaying invalid rgrp blocks
gfs2: Fix glock recursion in freeze_go_xmote_bh
gfs2: Fix memory leak of object lsi on error return path
Some small fixes and cleanups for fs/crypto/:
- Fix ->getattr() for ext4, f2fs, and ubifs to report the correct
st_size for encrypted symlinks.
- Use base64url instead of a custom Base64 variant.
- Document struct fscrypt_operations.
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Merge tag 'fscrypt-for-linus' of git://git.kernel.org/pub/scm/fs/fscrypt/fscrypt
Pull fscrypt updates from Eric Biggers:
"Some small fixes and cleanups for fs/crypto/:
- Fix ->getattr() for ext4, f2fs, and ubifs to report the correct
st_size for encrypted symlinks
- Use base64url instead of a custom Base64 variant
- Document struct fscrypt_operations"
* tag 'fscrypt-for-linus' of git://git.kernel.org/pub/scm/fs/fscrypt/fscrypt:
fscrypt: document struct fscrypt_operations
fscrypt: align Base64 encoding with RFC 4648 base64url
fscrypt: remove mention of symlink st_size quirk from documentation
ubifs: report correct st_size for encrypted symlinks
f2fs: report correct st_size for encrypted symlinks
ext4: report correct st_size for encrypted symlinks
fscrypt: add fscrypt_symlink_getattr() for computing st_size
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Merge tag 'for-5.15-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
Pull btrfs updates from David Sterba:
"The highlights of this round are integrations with fs-verity and
idmapped mounts, the rest is usual mix of minor improvements, speedups
and cleanups.
There are some patches outside of btrfs, namely updating some VFS
interfaces, all straightforward and acked.
Features:
- fs-verity support, using standard ioctls, backward compatible with
read-only limitation on inodes with previously enabled fs-verity
- idmapped mount support
- make mount with rescue=ibadroots more tolerant to partially damaged
trees
- allow raid0 on a single device and raid10 on two devices,
degenerate cases but might be useful as an intermediate step during
conversion to other profiles
- zoned mode block group auto reclaim can be disabled via sysfs knob
Performance improvements:
- continue readahead of node siblings even if target node is in
memory, could speed up full send (on sample test +11%)
- batching of delayed items can speed up creating many files
- fsync/tree-log speedups
- avoid unnecessary work (gains +2% throughput, -2% run time on
sample load)
- reduced lock contention on renames (on dbench +4% throughput,
up to -30% latency)
Fixes:
- various zoned mode fixes
- preemptive flushing threshold tuning, avoid excessive work on
almost full filesystems
Core:
- continued subpage support, preparation for implementing remaining
features like compression and defragmentation; with some
limitations, write is now enabled on 64K page systems with 4K
sectors, still considered experimental
- no readahead on compressed reads
- inline extents disabled
- disabled raid56 profile conversion and mount
- improved flushing logic, fixing early ENOSPC on some workloads
- inode flags have been internally split to read-only and read-write
incompat bit parts, used by fs-verity
- new tree items for fs-verity
- descriptor item
- Merkle tree item
- inode operations extended to be namespace-aware
- cleanups and refactoring
Generic code changes:
- fs: new export filemap_fdatawrite_wbc
- fs: removed sync_inode
- block: bio_trim argument type fixups
- vfs: add namespace-aware lookup"
* tag 'for-5.15-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux: (114 commits)
btrfs: reset replace target device to allocation state on close
btrfs: zoned: fix ordered extent boundary calculation
btrfs: do not do preemptive flushing if the majority is global rsv
btrfs: reduce the preemptive flushing threshold to 90%
btrfs: tree-log: check btrfs_lookup_data_extent return value
btrfs: avoid unnecessarily logging directories that had no changes
btrfs: allow idmapped mount
btrfs: handle ACLs on idmapped mounts
btrfs: allow idmapped INO_LOOKUP_USER ioctl
btrfs: allow idmapped SUBVOL_SETFLAGS ioctl
btrfs: allow idmapped SET_RECEIVED_SUBVOL ioctls
btrfs: relax restrictions for SNAP_DESTROY_V2 with subvolids
btrfs: allow idmapped SNAP_DESTROY ioctls
btrfs: allow idmapped SNAP_CREATE/SUBVOL_CREATE ioctls
btrfs: check whether fsgid/fsuid are mapped during subvolume creation
btrfs: allow idmapped permission inode op
btrfs: allow idmapped setattr inode op
btrfs: allow idmapped tmpfile inode op
btrfs: allow idmapped symlink inode op
btrfs: allow idmapped mkdir inode op
...
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Merge tag '5.15-rc-smb3-fixes-part1' of git://git.samba.org/sfrench/cifs-2.6
Pull cifs client updates from Steve French:
"Eleven cifs/smb3 client fixes:
- mostly restructuring to allow disabling less secure algorithms
(this will allow eventual removing rc4 and md4 from general use in
the kernel)
- four fixes, including two for stable
- enable r/w support with fscache and cifs.ko
I am working on a larger set of changes (the usual ... multichannel,
auth and signing improvements), but wanted to get these in earlier to
reduce chance of merge conflicts later in the merge window"
* tag '5.15-rc-smb3-fixes-part1' of git://git.samba.org/sfrench/cifs-2.6:
cifs: Do not leak EDEADLK to dgetents64 for STATUS_USER_SESSION_DELETED
cifs: add cifs_common directory to MAINTAINERS file
cifs: cifs_md4 convert to SPDX identifier
cifs: create a MD4 module and switch cifs.ko to use it
cifs: fork arc4 and create a separate module for it for cifs and other users
cifs: remove support for NTLM and weaker authentication algorithms
cifs: enable fscache usage even for files opened as rw
oid_registry: Add OIDs for missing Spnego auth mechanisms to Macs
smb3: fix posix extensions mount option
cifs: fix wrong release in sess_alloc_buffer() failed path
CIFS: Fix a potencially linear read overflow
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Merge tag '5.15-rc-first-ksmbd-merge' of git://git.samba.org/ksmbd
Pull initial ksmbd implementation from Steve French:
"Initial merge of kernel smb3 file server, ksmbd.
The SMB family of protocols is the most widely deployed network
filesystem protocol, the default on Windows and Macs (and even on many
phones and tablets), with clients and servers on all major operating
systems, but lacked a kernel server for Linux. For many cases the
current userspace server choices were suboptimal either due to memory
footprint, performance or difficulty integrating well with advanced
Linux features.
ksmbd is a new kernel module which implements the server-side of the
SMB3 protocol. The target is to provide optimized performance, GPLv2
SMB server, and better lease handling (distributed caching). The
bigger goal is to add new features more rapidly (e.g. RDMA aka
"smbdirect", and recent encryption and signing improvements to the
protocol) which are easier to develop on a smaller, more tightly
optimized kernel server than for example in Samba.
The Samba project is much broader in scope (tools, security services,
LDAP, Active Directory Domain Controller, and a cross platform file
server for a wider variety of purposes) but the user space file server
portion of Samba has proved hard to optimize for some Linux workloads,
including for smaller devices.
This is not meant to replace Samba, but rather be an extension to
allow better optimizing for Linux, and will continue to integrate well
with Samba user space tools and libraries where appropriate. Working
with the Samba team we have already made sure that the configuration
files and xattrs are in a compatible format between the kernel and
user space server.
Various types of functional and regression tests are regularly run
against it. One example is the automated 'buildbot' regression tests
which use the Linux client to test against ksmbd, e.g.
http://smb3-test-rhel-75.southcentralus.cloudapp.azure.com/#/builders/8/builds/56
but other test suites, including Samba's smbtorture functional test
suite are also used regularly"
* tag '5.15-rc-first-ksmbd-merge' of git://git.samba.org/ksmbd: (219 commits)
ksmbd: fix __write_overflow warning in ndr_read_string
MAINTAINERS: ksmbd: add cifs_common directory to ksmbd entry
MAINTAINERS: ksmbd: update my email address
ksmbd: fix permission check issue on chown and chmod
ksmbd: don't set FILE DELETE and FILE_DELETE_CHILD in access mask by default
MAINTAINERS: add git adddress of ksmbd
ksmbd: update SMB3 multi-channel support in ksmbd.rst
ksmbd: smbd: fix kernel oops during server shutdown
ksmbd: remove select FS_POSIX_ACL in Kconfig
ksmbd: use proper errno instead of -1 in smb2_get_ksmbd_tcon()
ksmbd: update the comment for smb2_get_ksmbd_tcon()
ksmbd: change int data type to boolean
ksmbd: Fix multi-protocol negotiation
ksmbd: fix an oops in error handling in smb2_open()
ksmbd: add ipv6_addr_v4mapped check to know if connection from client is ipv4
ksmbd: fix missing error code in smb2_lock
ksmbd: use channel signingkey for binding SMB2 session setup
ksmbd: don't set RSS capable in FSCTL_QUERY_NETWORK_INTERFACE_INFO
ksmbd: Return STATUS_OBJECT_PATH_NOT_FOUND if smb2_creat() returns ENOENT
ksmbd: fix -Wstringop-truncation warnings
...
Rename now works "Add new name and remove old name".
"Remove old name and add new name" may result in bad inode
if we can't add new name and then can't restore (add) old name.
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
For some reason we have FAT ioctl calls. Even old ntfs driver did not
use these. We should not use these because it his hard to get things out
of kernel when they are upstream. That's why we remove these for now.
More discussion is needed what ioctl should be implemented and what is
important.
Signed-off-by: Kari Argillander <kari.argillander@gmail.com>
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
Callers of fuse_writeback_range() assume that the file is ready for
modification by the server in the supplied byte range after the call
returns.
If there's a write that extends the file beyond the end of the supplied
range, then the file needs to be extended to at least the end of the range,
but currently that's not done.
There are at least two cases where this can cause problems:
- copy_file_range() will return short count if the file is not extended
up to end of the source range.
- FALLOC_FL_ZERO_RANGE | FALLOC_FL_KEEP_SIZE will not extend the file,
hence the region may not be fully allocated.
Fix by flushing writes from the start of the range up to the end of the
file. This could be optimized if the writes are non-extending, etc, but
it's probably not worth the trouble.
Fixes: a2bc92362941 ("fuse: fix copy_file_range() in the writeback case")
Fixes: 6b1bdb56b17c ("fuse: allow fallocate(FALLOC_FL_ZERO_RANGE)")
Cc: <stable@vger.kernel.org> # v5.2
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Now that ext4_do_update_inode() return error before filling the whole
inode data if we fail to set inode blocks in ext4_inode_blocks_set().
This error should never happen in theory since sb->s_maxbytes should not
have allowed this, we have already init sb->s_maxbytes according to this
feature in ext4_fill_super(). So even through that could only happen due
to the filesystem corruption, we'd better to return after we finish
updating the inode because it may left an uninitialized buffer and we
could read this buffer later in "errors=continue" mode.
This patch make the updating inode data procedure atomic, call
EXT4_ERROR_INODE() after we dropping i_raw_lock after something bad
happened, make sure that the inode is integrated, and also drop a BUG_ON
and do some small cleanups.
Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20210826130412.3921207-4-yi.zhang@huawei.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
The "if (!buffer_uptodate(bh))" hunk covered almost the whole code after
getting buffer in __ext4_get_inode_loc() which seems unnecessary, remove
it and switch to check ext4_buffer_uptodate(), it simplify code and make
it more readable.
Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20210826130412.3921207-3-yi.zhang@huawei.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
No EIO simulation is required if the buffer is uptodate, so move the
simulation behind read bio completeion just like inode/block bitmap
simulation does.
Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20210826130412.3921207-2-yi.zhang@huawei.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Even though the length of the critical section when adding / removing
orphaned inodes was significantly reduced by using orphan file, the
contention of lock protecting orphan file still appears high in profiles
for truncate / unlink intensive workloads with high number of threads.
This patch makes handling of orphan file completely lockless. Also to
reduce conflicts between CPUs different CPUs start searching for empty
slot in orphan file in different blocks.
Performance comparison of locked orphan file handling, lockless orphan
file handling, and completely disabled orphan inode handling
from 80 CPU Xeon Server with 526 GB of RAM, filesystem located on
SAS SSD disk, average of 5 runs:
stress-orphan (microbenchmark truncating files byte-by-byte from N
processes in parallel)
Threads Time Time Time
Orphan locked Orphan lockless No orphan
1 0.945600 0.939400 0.891200
2 1.331800 1.246600 1.174400
4 1.995000 1.780600 1.713200
8 6.424200 4.900000 4.106000
16 14.937600 8.516400 8.138000
32 33.038200 24.565600 24.002200
64 60.823600 39.844600 38.440200
128 122.941400 70.950400 69.315000
So we can see that with lockless orphan file handling, addition /
deletion of orphaned inodes got almost completely out of picture even
for a microbenchmark stressing it.
For reaim creat_clo workload on ramdisk there are also noticeable gains
(average of 5 runs):
Clients Vanilla (ops/s) Patched (ops/s)
creat_clo-1 14705.88 ( 0.00%) 14354.07 * -2.39%*
creat_clo-3 27108.43 ( 0.00%) 28301.89 ( 4.40%)
creat_clo-5 37406.48 ( 0.00%) 45180.73 * 20.78%*
creat_clo-7 41338.58 ( 0.00%) 54687.50 * 32.29%*
creat_clo-9 45226.13 ( 0.00%) 62937.07 * 39.16%*
creat_clo-11 44000.00 ( 0.00%) 65088.76 * 47.93%*
creat_clo-13 36516.85 ( 0.00%) 68661.97 * 88.03%*
creat_clo-15 30864.20 ( 0.00%) 69551.78 * 125.35%*
creat_clo-17 27478.45 ( 0.00%) 67729.08 * 146.48%*
creat_clo-19 25000.00 ( 0.00%) 61621.62 * 146.49%*
creat_clo-21 18772.35 ( 0.00%) 63829.79 * 240.02%*
creat_clo-23 16698.94 ( 0.00%) 61938.96 * 270.92%*
creat_clo-25 14973.05 ( 0.00%) 56947.61 * 280.33%*
creat_clo-27 16436.69 ( 0.00%) 65008.03 * 295.51%*
creat_clo-29 13949.01 ( 0.00%) 69047.62 * 395.00%*
creat_clo-31 14283.52 ( 0.00%) 67982.45 * 375.95%*
Reviewed-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20210816095713.16537-5-jack@suse.cz
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Ext4 orphan inode handling is a bottleneck for workloads which heavily
truncate / unlink small files since it contends on the global
s_orphan_mutex lock (and generally it's difficult to improve scalability
of the ondisk linked list of orphaned inodes).
This patch implements new way of handling orphan inodes. Instead of
linking orphaned inode into a linked list, we store it's inode number in
a new special file which we call "orphan file". Only if there's no more
space in the orphan file (too many inodes are currently orphaned) we
fall back to using old style linked list. Currently we protect
operations in the orphan file with a spinlock for simplicity but even in
this setting we can substantially reduce the length of the critical
section and thus speedup some workloads. In the next patch we improve
this by making orphan handling lockless.
Note that the change is backwards compatible when the filesystem is
clean - the existence of the orphan file is a compat feature, we set
another ro-compat feature indicating orphan file needs scanning for
orphaned inodes when mounting filesystem read-write. This ro-compat
feature gets cleared on unmount / remount read-only.
Some performance data from 80 CPU Xeon Server with 512 GB of RAM,
filesystem located on SSD, average of 5 runs:
stress-orphan (microbenchmark truncating files byte-by-byte from N
processes in parallel)
Threads Time Time
Vanilla Patched
1 1.057200 0.945600
2 1.680400 1.331800
4 2.547000 1.995000
8 7.049400 6.424200
16 14.827800 14.937600
32 40.948200 33.038200
64 87.787400 60.823600
128 206.504000 122.941400
So we can see significant wins all over the board.
Reviewed-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20210816095713.16537-3-jack@suse.cz
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Move functions for handling orphan inodes into a new file
fs/ext4/orphan.c to have them in one place and somewhat reduce size of
other files. No code changes.
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Reviewed-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20210816095713.16537-2-jack@suse.cz
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
JBD2 layer support triggers which are called when journaling layer moves
buffer to a certain state. We can use the frozen trigger, which gets
called when buffer data is frozen and about to be written out to the
journal, to compute block checksums for some buffer types (similarly as
does ocfs2). This avoids unnecessary repeated recomputation of the
checksum (at the cost of larger window where memory corruption won't be
caught by checksumming) and is even necessary when there are
unsynchronized updaters of the checksummed data.
So add superblock and journal trigger type arguments to
ext4_journal_get_write_access() and ext4_journal_get_create_access() so
that frozen triggers can be set accordingly. Also add inode argument to
ext4_walk_page_buffers() and all the callbacks used with that function
for the same purpose. This patch is mostly only a change of prototype of
the above mentioned functions and a few small helpers. Real checksumming
will come later.
Reviewed-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20210816095713.16537-1-jack@suse.cz
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
The location of the system.data extended attribute can change whenever
xattr_sem is not taken. So we need to recalculate the i_inline_off
field since it mgiht have changed between ext4_write_begin() and
ext4_write_end().
This means that caching i_inline_off is probably not helpful, so in
the long run we should probably get rid of it and shrink the in-memory
ext4 inode slightly, but let's fix the race the simple way for now.
Cc: stable@kernel.org
Fixes: f19d5870cbf72 ("ext4: add normal write support for inline data")
Reported-by: syzbot+13146364637c7363a7de@syzkaller.appspotmail.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Add sparse annotations to suppress false positive context imbalance
warnings, and use NULL instead of 0 in EXT_MAX_{EXTENT,INDEX}.
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
If ext4 filesystem is corrupted so that quota files are linked from
directory hirerarchy, bad things can happen. E.g. quota files can get
corrupted or deleted. Make sure we are not grabbing quota file inodes
when we expect normal inodes.
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Link: https://lore.kernel.org/r/20210812133122.26360-1-jack@suse.cz
Commit 81414b4dd48 ("ext4: remove redundant sb checksum
recomputation") removed checksum recalculation after updating
superblock free space / inode counters in ext4_fill_super() based on
the fact that we will recalculate the checksum on superblock
writeout.
That is correct assumption but until the writeout happens (which can
take a long time) the checksum is incorrect in the buffer cache and if
programs such as tune2fs or resize2fs is called shortly after a file
system is mounted can fail. So return back the checksum recalculation
and add a comment explaining why.
Fixes: 81414b4dd48f ("ext4: remove redundant sb checksum recomputation")
Cc: stable@kernel.org
Reported-by: Boyang Xue <bxue@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Link: https://lore.kernel.org/r/20210812124737.21981-1-jack@suse.cz
If the underlying storage device is using thin-provisioning, it's
possible for a zeroout operation to return ENOSPC.
Commit df22291ff0fd ("ext4: Retry block allocation if we have free blocks
left") added logic to retry block allocation since we might get free block
after we commit a transaction. But the ENOSPC from thin-provisioning
will confuse ext4, and lead to an infinite loop.
Since using zeroout instead of splitting the extent node is an
optimization, if it fails, we might as well fall back to splitting the
extent node.
Reported-by: yangerkun <yangerkun@huawei.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Let's pass fc_dentry directly since those arguments (tag, parent_ino and
ino etc) can be deferenced from it.
Signed-off-by: Guoqing Jiang <jiangguoqing@kylinos.cn>
Reviewed-by: Harshad Shirwadkar <harshadshirwadkar@gmail.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Link: https://lore.kernel.org/r/20210727080708.3708814-1-guoqing.jiang@linux.dev
The background discard kwork tries to mark blocks used and issue
discard. This can make filesystem suffer from NOSPC error, xfstest
generic/371 can fail due to it. Fix it by flushing discard kwork
in ext4_should_retry_alloc. At the same time, give up discard at
the moment.
Signed-off-by: Wang Jianchao <wangjianchao@kuaishou.com>
Link: https://lore.kernel.org/r/20210830075246.12516-6-jianchao.wan9@gmail.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Right now, discard is issued and waited to be completed in jbd2
commit kthread context after the logs are committed. When large
amount of files are deleted and discard is flooding, jbd2 commit
kthread can be blocked for long time. Then all of the metadata
operations can be blocked to wait the log space.
One case is the page fault path with read mm->mmap_sem held, which
wants to update the file time but has to wait for the log space.
When other threads in the task wants to do mmap, then write mmap_sem
is blocked. Finally all of the following read mmap_sem requirements
are blocked, even the ps command which need to read the /proc/pid/
-cmdline. Our monitor service which needs to read /proc/pid/cmdline
used to be blocked for 5 mins.
This patch frees the blocks back to buddy after commit and then do
discard in a async kworker context in fstrim fashion, namely,
- mark blocks to be discarded as used if they have not been allocated
- do discard
- mark them free
After this, jbd2 commit kthread won't be blocked any more by discard
and we won't get NOSPC even if the discard is slow or throttled.
Link: https://marc.info/?l=linux-kernel&m=162143690731901&w=2
Suggested-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Wang Jianchao <wangjianchao@kuaishou.com>
Link: https://lore.kernel.org/r/20210830075246.12516-5-jianchao.wan9@gmail.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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Merge tag 'for-5.15/io_uring-vfs-2021-08-30' of git://git.kernel.dk/linux-block
Pull io_uring mkdirat/symlinkat/linkat support from Jens Axboe:
"This adds io_uring support for mkdirat, symlinkat, and linkat"
* tag 'for-5.15/io_uring-vfs-2021-08-30' of git://git.kernel.dk/linux-block:
io_uring: add support for IORING_OP_LINKAT
io_uring: add support for IORING_OP_SYMLINKAT
io_uring: add support for IORING_OP_MKDIRAT
namei: update do_*() helpers to return ints
namei: make do_linkat() take struct filename
namei: add getname_uflags()
namei: make do_symlinkat() take struct filename
namei: make do_mknodat() take struct filename
namei: make do_mkdirat() take struct filename
namei: change filename_parentat() calling conventions
namei: ignore ERR/NULL names in putname()
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Merge tag 'io_uring-bio-cache.5-2021-08-30' of git://git.kernel.dk/linux-block
Pull support for struct bio recycling from Jens Axboe:
"This adds bio recycling support for polled IO, allowing quick reuse of
a bio for high IOPS scenarios via a percpu bio_set list.
It's good for almost a 10% improvement in performance, bumping our
per-core IO limit from ~3.2M IOPS to ~3.5M IOPS"
* tag 'io_uring-bio-cache.5-2021-08-30' of git://git.kernel.dk/linux-block:
bio: improve kerneldoc documentation for bio_alloc_kiocb()
block: provide bio_clear_hipri() helper
block: use the percpu bio cache in __blkdev_direct_IO
io_uring: enable use of bio alloc cache
block: clear BIO_PERCPU_CACHE flag if polling isn't supported
bio: add allocation cache abstraction
fs: add kiocb alloc cache flag
bio: optimize initialization of a bio
Core code:
- Cure a couple of incorrectness issues in the posix CPU timer code to
prevent that the tick dependency for NOHZ full is kept alive for no
reason.
- Avoid expensive double reprogramming of the clockevent device in
hrtimer_start_range_ns().
- Avoid pointless SMP function calls when the clock was set to avoid
disturbing CPUs which do not have any affected timers queued.
- Make the clocksource watchdog test work correctly when CONFIG_HZ is
less than 100.
Drivers:
- Prefer the ARM architected timer over the Exynos timer which is way
more expensive to access.
- Add device tree bindings for new Ingenic SoCs
- The usual improvements and cleanups all over the place
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Merge tag 'timers-core-2021-08-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer updates from Thomas Gleixner:
"Updates for timekeeping, timers and related drivers:
Core code:
- Cure a couple of correctness issues in the posix CPU timer code to
prevent that the tick dependency for NOHZ full is kept alive for no
reason.
- Avoid expensive double reprogramming of the clockevent device in
hrtimer_start_range_ns().
- Avoid pointless SMP function calls when the clock was set to avoid
disturbing CPUs which do not have any affected timers queued.
- Make the clocksource watchdog test work correctly when CONFIG_HZ is
less than 100.
Drivers:
- Prefer the ARM architected timer over the Exynos timer which is way
more expensive to access.
- Add device tree bindings for new Ingenic SoCs
- The usual improvements and cleanups all over the place"
* tag 'timers-core-2021-08-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (29 commits)
clocksource: Make clocksource watchdog test safe for slow-HZ systems
dt-bindings: timer: Add ABIs for new Ingenic SoCs
clocksource/drivers/fttmr010: Pass around less pointers
clocksource/drivers/mediatek: Optimize systimer irq clear flow on shutdown
clocksource/drivers/ingenic: Use bitfield macro helpers
clocksource/drivers/sh_cmt: Fix wrong setting if don't request IRQ for clock source channel
dt-bindings: timer: convert rockchip,rk-timer.txt to YAML
clocksource/drivers/exynos_mct: Mark MCT device as CLOCK_EVT_FEAT_PERCPU
clocksource/drivers/exynos_mct: Prioritise Arm arch timer on arm64
hrtimer: Unbreak hrtimer_force_reprogram()
hrtimer: Use raw_cpu_ptr() in clock_was_set()
hrtimer: Avoid more SMP function calls in clock_was_set()
hrtimer: Avoid unnecessary SMP function calls in clock_was_set()
hrtimer: Add bases argument to clock_was_set()
time/timekeeping: Avoid invoking clock_was_set() twice
timekeeping: Distangle resume and clock-was-set events
timerfd: Provide timerfd_resume()
hrtimer: Force clock_was_set() handling for the HIGHRES=n, NOHZ=y case
hrtimer: Ensure timerfd notification for HIGHRES=n
hrtimer: Consolidate reprogramming code
...
- The biggest change in this cycle is scheduler support for asymmetric
scheduling affinity, to support the execution of legacy 32-bit tasks on
AArch32 systems that also have 64-bit-only CPUs.
Architectures can fill in this functionality by defining their
own task_cpu_possible_mask(p). When this is done, the scheduler will
make sure the task will only be scheduled on CPUs that support it.
(The actual arm64 specific changes are not part of this tree.)
For other architectures there will be no change in functionality.
- Add cgroup SCHED_IDLE support
- Increase node-distance flexibility & delay determining it until a CPU
is brought online. (This enables platforms where node distance isn't
final until the CPU is only.)
- Deadline scheduler enhancements & fixes
- Misc fixes & cleanups.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'sched-core-2021-08-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler updates from Ingo Molnar:
- The biggest change in this cycle is scheduler support for asymmetric
scheduling affinity, to support the execution of legacy 32-bit tasks
on AArch32 systems that also have 64-bit-only CPUs.
Architectures can fill in this functionality by defining their own
task_cpu_possible_mask(p). When this is done, the scheduler will make
sure the task will only be scheduled on CPUs that support it.
(The actual arm64 specific changes are not part of this tree.)
For other architectures there will be no change in functionality.
- Add cgroup SCHED_IDLE support
- Increase node-distance flexibility & delay determining it until a CPU
is brought online. (This enables platforms where node distance isn't
final until the CPU is only.)
- Deadline scheduler enhancements & fixes
- Misc fixes & cleanups.
* tag 'sched-core-2021-08-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (27 commits)
eventfd: Make signal recursion protection a task bit
sched/fair: Mark tg_is_idle() an inline in the !CONFIG_FAIR_GROUP_SCHED case
sched: Introduce dl_task_check_affinity() to check proposed affinity
sched: Allow task CPU affinity to be restricted on asymmetric systems
sched: Split the guts of sched_setaffinity() into a helper function
sched: Introduce task_struct::user_cpus_ptr to track requested affinity
sched: Reject CPU affinity changes based on task_cpu_possible_mask()
cpuset: Cleanup cpuset_cpus_allowed_fallback() use in select_fallback_rq()
cpuset: Honour task_cpu_possible_mask() in guarantee_online_cpus()
cpuset: Don't use the cpu_possible_mask as a last resort for cgroup v1
sched: Introduce task_cpu_possible_mask() to limit fallback rq selection
sched: Cgroup SCHED_IDLE support
sched/topology: Skip updating masks for non-online nodes
sched: Replace deprecated CPU-hotplug functions.
sched: Skip priority checks with SCHED_FLAG_KEEP_PARAMS
sched: Fix UCLAMP_FLAG_IDLE setting
sched/deadline: Fix missing clock update in migrate_task_rq_dl()
sched/fair: Avoid a second scan of target in select_idle_cpu
sched/fair: Use prev instead of new target as recent_used_cpu
sched: Don't report SCHED_FLAG_SUGOV in sched_getattr()
...
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Merge tag 'locks-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/jlayton/linux
Pull file locking updates from Jeff Layton:
"This starts with a couple of fixes for potential deadlocks in the
fowner/fasync handling.
The next patch removes the old mandatory locking code from the kernel
altogether.
The last patch cleans up rw_verify_area a bit more after the mandatory
locking removal"
* tag 'locks-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/jlayton/linux:
fs: clean up after mandatory file locking support removal
fs: remove mandatory file locking support
fcntl: fix potential deadlock for &fasync_struct.fa_lock
fcntl: fix potential deadlocks for &fown_struct.lock
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Merge tag 'hole_punch_for_v5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
Pull fs hole punching vs cache filling race fixes from Jan Kara:
"Fix races leading to possible data corruption or stale data exposure
in multiple filesystems when hole punching races with operations such
as readahead.
This is the series I was sending for the last merge window but with
your objection fixed - now filemap_fault() has been modified to take
invalidate_lock only when we need to create new page in the page cache
and / or bring it uptodate"
* tag 'hole_punch_for_v5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
filesystems/locking: fix Malformed table warning
cifs: Fix race between hole punch and page fault
ceph: Fix race between hole punch and page fault
fuse: Convert to using invalidate_lock
f2fs: Convert to using invalidate_lock
zonefs: Convert to using invalidate_lock
xfs: Convert double locking of MMAPLOCK to use VFS helpers
xfs: Convert to use invalidate_lock
xfs: Refactor xfs_isilocked()
ext2: Convert to using invalidate_lock
ext4: Convert to use mapping->invalidate_lock
mm: Add functions to lock invalidate_lock for two mappings
mm: Protect operations adding pages to page cache with invalidate_lock
documentation: Sync file_operations members with reality
mm: Fix comments mentioning i_mutex
Instead of messing around with XDR padding in the RDMA layer, we should
just give the RPC layer an aligned buffer. Try to avoid creating extra
RPC calls by aligning to the smaller value of ALIGN(len, rsize) and
PAGE_SIZE.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
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Merge tag 'fs_for_v5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
Pull UDF and isofs updates from Jan Kara:
"Several smaller fixes and cleanups in UDF and isofs"
* tag 'fs_for_v5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
udf_get_extendedattr() had no boundary checks.
isofs: joliet: Fix iocharset=utf8 mount option
udf: Fix iocharset=utf8 mount option
udf: Get rid of 0-length arrays in struct fileIdentDesc
udf: Get rid of 0-length arrays
udf: Remove unused declaration
udf: Check LVID earlier
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Merge tag 'fiemap_for_v5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
Pull FIEMAP cleanups from Jan Kara:
"FIEMAP cleanups from Christoph transitioning all remaining filesystems
supporting FIEMAP (ext2, hpfs) to iomap API and removing the old
helper"
* tag 'fiemap_for_v5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
fs: remove generic_block_fiemap
hpfs: use iomap_fiemap to implement ->fiemap
ext2: use iomap_fiemap to implement ->fiemap
ext2: make ext2_iomap_ops available unconditionally
Let's only enable realtime discard if and only if device supports
discard functionality.
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
We must flush all the dirty data when enabling checkpoint back. Let's guarantee
that first by adding a retry logic on sync_inodes_sb(). In addition to that,
this patch adds to flush data in fsync when checkpoint is disabled, which can
mitigate the sync_inodes_sb() failures in advance.
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
We need to unmap pages from userspace process before removing pagecache
in punch_hole() like we did in f2fs_setattr().
Similar change:
commit 5e44f8c374dc ("ext4: hole-punch use truncate_pagecache_range")
Fixes: fbfa2cc58d53 ("f2fs: add file operations")
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
In below path, it will return ENOENT if filesystem is shutdown:
- f2fs_map_blocks
- f2fs_get_dnode_of_data
- f2fs_get_node_page
- __get_node_page
- read_node_page
- is_sbi_flag_set(sbi, SBI_IS_SHUTDOWN)
return -ENOENT
- force return value from ENOENT to 0
It should be fine for read case, since it indicates a hole condition,
and caller could use .m_next_pgofs to skip the hole and continue the
lookup.
However it may cause confusing for write case, since leaving a hole
there, and said nothing was wrong doesn't help.
There is at least one case from dax_iomap_actor() will complain that,
so fix this in prior to supporting dax in f2fs.
xfstest generic/388 reports below warning:
ubuntu godown: xfstests-induced forced shutdown of /mnt/scratch_f2fs:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 485833 at fs/dax.c:1127 dax_iomap_actor+0x339/0x370
Call Trace:
iomap_apply+0x1c4/0x7b0
? dax_iomap_rw+0x1c0/0x1c0
dax_iomap_rw+0xad/0x1c0
? dax_iomap_rw+0x1c0/0x1c0
f2fs_file_write_iter+0x5ab/0x970 [f2fs]
do_iter_readv_writev+0x273/0x2e0
do_iter_write+0xab/0x1f0
vfs_iter_write+0x21/0x40
iter_file_splice_write+0x287/0x540
do_splice+0x37c/0xa60
__x64_sys_splice+0x15f/0x3a0
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x44/0xae
ubuntu godown: xfstests-induced forced shutdown of /mnt/scratch_f2fs:
------------[ cut here ]------------
RIP: 0010:dax_iomap_pte_fault.isra.0+0x72e/0x14a0
Call Trace:
dax_iomap_fault+0x44/0x70
f2fs_dax_huge_fault+0x155/0x400 [f2fs]
f2fs_dax_fault+0x18/0x30 [f2fs]
__do_fault+0x4e/0x120
do_fault+0x3cf/0x7a0
__handle_mm_fault+0xa8c/0xf20
? find_held_lock+0x39/0xd0
handle_mm_fault+0x1b6/0x480
do_user_addr_fault+0x320/0xcd0
? rcu_read_lock_sched_held+0x67/0xc0
exc_page_fault+0x77/0x3f0
? asm_exc_page_fault+0x8/0x30
asm_exc_page_fault+0x1e/0x30
Fixes: 83a3bfdb5a8a ("f2fs: indicate shutdown f2fs to allow unmount successfully")
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
There is a missing place we forgot to account .skipped_gc_rwsem, fix it.
Fixes: 6f8d4455060d ("f2fs: avoid fi->i_gc_rwsem[WRITE] lock in f2fs_gc")
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This patch adjusts unlock order of .i_mmap_sem and .i_gc_rwsem for
cleanup.
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Don't create discard thread when device doesn't support realtime discard
or user specifies nodiscard mount option.
Signed-off-by: Fengnan Chang <changfengnan@vivo.com>
Signed-off-by: Yangtao Li <frank.li@vivo.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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Merge tag 'fsnotify_for_v5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
Pull fsnotify updates from Jan Kara:
"fsnotify speedups when notification actually isn't used and support
for identifying processes which caused fanotify events through pidfd
instead of normal pid"
* tag 'fsnotify_for_v5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
fsnotify: optimize the case of no marks of any type
fsnotify: count all objects with attached connectors
fsnotify: count s_fsnotify_inode_refs for attached connectors
fsnotify: replace igrab() with ihold() on attach connector
fanotify: add pidfd support to the fanotify API
fanotify: introduce a generic info record copying helper
fanotify: minor cosmetic adjustments to fid labels
kernel/pid.c: implement additional checks upon pidfd_create() parameters
kernel/pid.c: remove static qualifier from pidfd_create()
Capitalize comments and end with period for better reading.
Also function comments are now little more kernel-doc style. This way we
can easily convert them to kernel-doc style if we want. Note that these
are not yet complete with this style. Example function comments start
with /* and in kernel-doc style they start /**.
Use imperative mood in function descriptions.
Change words like ntfs -> NTFS, linux -> Linux.
Use "we" not "I" when commenting code.
Signed-off-by: Kari Argillander <kari.argillander@gmail.com>
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
When new work is added, io_wqe_enqueue() checks if we need to wake or
create a new worker. But that check is done outside the lock that
otherwise synchronizes us with a worker going to sleep, so we can end
up in the following situation:
CPU0 CPU1
lock
insert work
unlock
atomic_read(nr_running) != 0
lock
atomic_dec(nr_running)
no wakeup needed
Hold the wqe lock around the "need to wakeup" check. Then we can also get
rid of the temporary work_flags variable, as we know the work will remain
valid as long as we hold the lock.
Cc: stable@vger.kernel.org
Reported-by: Andres Freund <andres@anarazel.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
io_uring no longer queues async work off completion handlers that run in
hard or soft interrupt context, and that use case was the only reason that
io-wq had to use IRQ safe locks for wqe and worker locks.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
For the two places where new workers are created, we diligently check if
we are allowed to create a new worker. If we're currently at the limit
of how many workers of a given type we can have, then we don't create
any new ones.
If you have a mixed workload with various types of bound and unbounded
work, then it can happen that a worker finishes one type of work and
is then transitioned to the other type. For this case, we don't check
if we are actually allowed to do so. This can cause io-wq to temporarily
exceed the allowed number of workers for a given type.
When retrieving work, check that the types match. If they don't, check
if we are allowed to transition to the other type. If not, then don't
handle the new work.
Cc: stable@vger.kernel.org
Reported-by: Johannes Lundberg <johalun0@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
