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Kent Overstreet 6547ebabda bcachefs: Don't call lock_graph_descend() with wait lock held 
This fixes a deadlock:

01305 WARNING: possible circular locking dependency detected
01305 6.3.0-ktest-gf4de9bee61af #5305 Tainted: G        W
01305 ------------------------------------------------------
01305 cat/14658 is trying to acquire lock:
01305 ffffffc00982f460 (fs_reclaim){+.+.}-{0:0}, at: __kmem_cache_alloc_node+0x48/0x278
01305
01305 but task is already holding lock:
01305 ffffff8011aaf040 (&lock->wait_lock){+.+.}-{2:2}, at: bch2_check_for_deadlock+0x4b8/0xa58
01305
01305 which lock already depends on the new lock.
01305
01305
01305 the existing dependency chain (in reverse order) is:
01305
01305 -> #2 (&lock->wait_lock){+.+.}-{2:2}:
01305        _raw_spin_lock+0x54/0x70
01305        __six_lock_wakeup+0x40/0x1b0
01305        six_unlock_ip+0xe8/0x248
01305        bch2_btree_key_cache_scan+0x720/0x940
01305        shrink_slab.constprop.0+0x284/0x770
01305        shrink_node+0x390/0x828
01305        balance_pgdat+0x390/0x6d0
01305        kswapd+0x2e4/0x718
01305        kthread+0x184/0x1a8
01305        ret_from_fork+0x10/0x20
01305
01305 -> #1 (&c->lock#2){+.+.}-{3:3}:
01305        __mutex_lock+0x104/0x14a0
01305        mutex_lock_nested+0x30/0x40
01305        bch2_btree_key_cache_scan+0x5c/0x940
01305        shrink_slab.constprop.0+0x284/0x770
01305        shrink_node+0x390/0x828
01305        balance_pgdat+0x390/0x6d0
01305        kswapd+0x2e4/0x718
01305        kthread+0x184/0x1a8
01305        ret_from_fork+0x10/0x20
01305
01305 -> #0 (fs_reclaim){+.+.}-{0:0}:
01305        __lock_acquire+0x19d0/0x2930
01305        lock_acquire+0x1dc/0x458
01305        fs_reclaim_acquire+0x9c/0xe0
01305        __kmem_cache_alloc_node+0x48/0x278
01305        __kmalloc_node_track_caller+0x5c/0x278
01305        krealloc+0x94/0x180
01305        bch2_printbuf_make_room.part.0+0xac/0x118
01305        bch2_prt_printf+0x150/0x1e8
01305        bch2_btree_bkey_cached_common_to_text+0x170/0x298
01305        bch2_btree_trans_to_text+0x244/0x348
01305        print_cycle+0x7c/0xb0
01305        break_cycle+0x254/0x528
01305        bch2_check_for_deadlock+0x59c/0xa58
01305        bch2_btree_deadlock_read+0x174/0x200
01305        full_proxy_read+0x94/0xf0
01305        vfs_read+0x15c/0x3a8
01305        ksys_read+0xb8/0x148
01305        __arm64_sys_read+0x48/0x60
01305        invoke_syscall.constprop.0+0x64/0x138
01305        do_el0_svc+0x84/0x138
01305        el0_svc+0x34/0x80
01305        el0t_64_sync_handler+0xb0/0xb8
01305        el0t_64_sync+0x14c/0x150
01305
01305 other info that might help us debug this:
01305
01305 Chain exists of:
01305   fs_reclaim --> &c->lock#2 --> &lock->wait_lock
01305
01305  Possible unsafe locking scenario:
01305
01305        CPU0                    CPU1
01305        ----                    ----
01305   lock(&lock->wait_lock);
01305                                lock(&c->lock#2);
01305                                lock(&lock->wait_lock);
01305   lock(fs_reclaim);
01305
01305  *** DEADLOCK ***

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2023-10-22 17:10:04 -04:00
..
9p
- Some swap cleanups from Ma Wupeng ("fix WARN_ON in add_to_avail_list")
2023-08-29 14:25:26 -07:00
adfs
for-6.6/block-2023-08-28
2023-08-29 20:21:42 -07:00
affs
for-6.6/block-2023-08-28
2023-08-29 20:21:42 -07:00
afs
- Some swap cleanups from Ma Wupeng ("fix WARN_ON in add_to_avail_list")
2023-08-29 14:25:26 -07:00
autofs
v6.6-vfs.autofs
2023-08-28 11:39:14 -07:00
bcachefs
bcachefs: Don't call lock_graph_descend() with wait lock held
2023-10-22 17:10:04 -04:00
befs
for-6.6/block-2023-08-28
2023-08-29 20:21:42 -07:00
bfs
for-6.6/block-2023-08-28
2023-08-29 20:21:42 -07:00
btrfs
- Some swap cleanups from Ma Wupeng ("fix WARN_ON in add_to_avail_list")
2023-08-29 14:25:26 -07:00
cachefiles
- Some swap cleanups from Ma Wupeng ("fix WARN_ON in add_to_avail_list")
2023-08-29 14:25:26 -07:00
ceph
Mixed with some fixes and cleanups, this brings in reasonably complete
2023-09-06 12:10:15 -07:00
coda
v6.6-vfs.ctime
2023-08-28 09:31:32 -07:00
configfs
configfs: convert to ctime accessor functions
2023-07-13 10:28:05 +02:00
cramfs
v6.6-vfs.super
2023-08-28 11:04:18 -07:00
crypto
…
debugfs
Char/Misc driver changes for 6.6-rc1
2023-09-01 09:53:54 -07:00
devpts
v6.6-vfs.misc
2023-08-28 10:17:14 -07:00
dlm
dlm: fix plock lookup when using multiple lockspaces
2023-08-25 10:31:39 -05:00
ecryptfs
v6.6-vfs.misc
2023-08-28 10:17:14 -07:00
efivarfs
efivarfs: convert to ctime accessor functions
2023-07-13 10:28:06 +02:00
efs
for-6.6/block-2023-08-28
2023-08-29 20:21:42 -07:00
erofs
- Some swap cleanups from Ma Wupeng ("fix WARN_ON in add_to_avail_list")
2023-08-29 14:25:26 -07:00
exfat
for-6.6/block-2023-08-28
2023-08-29 20:21:42 -07:00
exportfs
exportfs: remove kernel-doc warnings in exportfs
2023-08-29 17:45:22 -04:00
ext2
\n
2023-08-30 12:10:50 -07:00
ext4
Many ext4 and jbd2 cleanups and bug fixes for v6.6-rc1.
2023-08-31 15:18:15 -07:00
f2fs
f2fs update for 6.6-rc1
2023-09-02 15:37:59 -07:00
fat
for-6.6/block-2023-08-28
2023-08-29 20:21:42 -07:00
freevxfs
for-6.6/block-2023-08-28
2023-08-29 20:21:42 -07:00
fscache
…
fuse
fuse update for 6.6
2023-09-05 12:45:55 -07:00
gfs2
gfs2 fixes
2023-09-05 13:00:28 -07:00
hfs
for-6.6/block-2023-08-28
2023-08-29 20:21:42 -07:00
hfsplus
for-6.6/block-2023-08-28
2023-08-29 20:21:42 -07:00
hostfs
hostfs: convert to ctime accessor functions
2023-07-24 10:30:00 +02:00
hpfs
for-6.6/block-2023-08-28
2023-08-29 20:21:42 -07:00
hugetlbfs
- Some swap cleanups from Ma Wupeng ("fix WARN_ON in add_to_avail_list")
2023-08-29 14:25:26 -07:00
iomap
for-6.6/block-2023-08-28
2023-08-29 20:21:42 -07:00
isofs
for-6.6/block-2023-08-28
2023-08-29 20:21:42 -07:00
jbd2
Many ext4 and jbd2 cleanups and bug fixes for v6.6-rc1.
2023-08-31 15:18:15 -07:00
jffs2
jffs2: convert to ctime accessor functions
2023-07-24 10:30:01 +02:00
jfs
A few small fixes
2023-08-31 15:25:01 -07:00
kernfs
Driver core changes for 6.6-rc1
2023-09-01 09:43:18 -07:00
lockd
SUNRPC: Add enum svc_auth_status
2023-08-29 17:45:22 -04:00
minix
for-6.6/block-2023-08-28
2023-08-29 20:21:42 -07:00
netfs
…
nfs
NFS CLient Updates for Linux 6.6
2023-08-31 15:36:41 -07:00
nfs_common
…
nfsd
NFSD 6.6 Release Notes
2023-08-31 15:32:18 -07:00
nilfs2
for-6.6/block-2023-08-28
2023-08-29 20:21:42 -07:00
nls
nls: Hide new NLS_UCS2_UTILS
2023-08-31 12:07:34 -05:00
notify
dnotify: Pass argument of fcntl_dirnotify as int
2023-07-10 14:36:12 +02:00
ntfs
for-6.6/block-2023-08-28
2023-08-29 20:21:42 -07:00
ntfs3
ntfs3: drop inode references in ntfs_put_super()
2023-09-07 10:23:37 -07:00
ocfs2
Many ext4 and jbd2 cleanups and bug fixes for v6.6-rc1.
2023-08-31 15:18:15 -07:00
omfs
for-6.6/block-2023-08-28
2023-08-29 20:21:42 -07:00
openpromfs
openpromfs: convert to ctime accessor functions
2023-07-24 10:30:03 +02:00
orangefs
fs: drop the timespec64 argument from update_time
2023-08-11 09:04:57 +02:00
overlayfs
overlayfs update for 6.6
2023-08-30 11:54:09 -07:00
proc
- Stefan Roesch has added ksm statistics to /proc/pid/smaps
2023-09-05 10:56:27 -07:00
pstore
pstore fix for v6.6-rc1
2023-09-02 10:45:17 -07:00
qnx4
for-6.6/block-2023-08-28
2023-08-29 20:21:42 -07:00
qnx6
for-6.6/block-2023-08-28
2023-08-29 20:21:42 -07:00
quota
\n
2023-08-30 12:10:50 -07:00
ramfs
ramfs: convert to ctime accessor functions
2023-07-24 10:30:04 +02:00
reiserfs
for-6.6/block-2023-08-28
2023-08-29 20:21:42 -07:00
romfs
for-6.6/block-2023-08-28
2023-08-29 20:21:42 -07:00
smb
six smb3 client fixes, one fix for nls Kconfig, one minor spnego registry update
2023-09-09 19:56:23 -07:00
squashfs
squashfs: convert to ctime accessor functions
2023-07-24 10:30:05 +02:00
sysfs
…
sysv
for-6.6/block-2023-08-28
2023-08-29 20:21:42 -07:00
tracefs
Tracing updates for 6.6:
2023-09-01 16:34:25 -07:00
ubifs
fs: drop the timespec64 argument from update_time
2023-08-11 09:04:57 +02:00
udf
\n
2023-08-30 12:10:50 -07:00
ufs
for-6.6/block-2023-08-28
2023-08-29 20:21:42 -07:00
unicode
…
vboxsf
v6.6-vfs.ctime
2023-08-28 09:31:32 -07:00
verity
fsverity: skip PKCS#7 parser when keyring is empty
2023-08-20 10:33:43 -07:00
xfs
New code for 6.6:
2023-08-30 12:34:12 -07:00
zonefs
New code for 6.6:
2023-08-28 11:59:52 -07:00
aio.c
Add x86 shadow stack support
2023-08-31 12:20:12 -07:00
anon_inodes.c
…
attr.c
v6.6-vfs.misc
2023-08-28 10:17:14 -07:00
bad_inode.c
fs: drop the timespec64 argument from update_time
2023-08-11 09:04:57 +02:00
binfmt_elf_fdpic.c
binfmt_elf_fdpic: support 64-bit systems
2023-08-23 14:17:42 -07:00
binfmt_elf_test.c
…
binfmt_elf.c
…
binfmt_flat.c
…
binfmt_misc.c
fs: convert to ctime accessor functions
2023-07-13 10:28:04 +02:00
binfmt_script.c
…
buffer.c
for-6.6/block-2023-08-28
2023-08-29 20:21:42 -07:00
char_dev.c
…
compat_binfmt_elf.c
…
coredump.c
…
d_path.c
…
dax.c
mm: remove enum page_entry_size
2023-08-24 16:20:30 -07:00
dcache.c
fs: factor out d_mark_tmpfile()
2023-09-11 23:59:47 -04:00
direct-io.c
…
drop_caches.c
fs: drop_caches: draining pages before dropping caches
2023-08-18 10:12:11 -07:00
eventfd.c
eventfd: prevent underflow for eventfd semaphores
2023-07-11 11:41:34 +02:00
eventpoll.c
epoll: simplify ep_alloc()
2023-07-26 14:56:07 +02:00
exec.c
- An extensive rework of kexec and crash Kconfig from Eric DeVolder
2023-08-29 14:53:51 -07:00
fcntl.c
fcntl: Cast commands with int args explicitly
2023-07-10 14:36:11 +02:00
fhandle.c
…
file_table.c
fs: use __fput_sync in close(2)
2023-08-08 19:36:51 +02:00
file.c
v6.6-vfs.misc
2023-08-28 10:17:14 -07:00
filesystems.c
…
fs_context.c
v6.6-vfs.misc
2023-08-28 10:17:14 -07:00
fs_parser.c
…
fs_pin.c
…
fs_struct.c
kill do_each_thread()
2023-08-21 13:46:25 -07:00
fs_types.c
…
fs-writeback.c
super: make locking naming consistent
2023-08-21 14:36:57 +02:00
fsopen.c
fs: add FSCONFIG_CMD_CREATE_EXCL
2023-08-14 18:48:02 +02:00
init.c
…
inode.c
v6.6-vfs.super
2023-08-28 11:04:18 -07:00
internal.h
for-6.6/block-2023-08-28
2023-08-29 20:21:42 -07:00
ioctl.c
v6.6-vfs.super
2023-08-28 11:04:18 -07:00
Kconfig
bcachefs: Initial commit
2023-10-22 17:08:07 -04:00
Kconfig.binfmt
riscv: support the elf-fdpic binfmt loader
2023-08-23 14:17:43 -07:00
kernel_read_file.c
fs: Fix kernel-doc warnings
2023-08-19 12:12:12 +02:00
libfs.c
Many ext4 and jbd2 cleanups and bug fixes for v6.6-rc1.
2023-08-31 15:18:15 -07:00
locks.c
NFSD 6.6 Release Notes
2023-08-31 15:32:18 -07:00
Makefile
bcachefs: Initial commit
2023-10-22 17:08:07 -04:00
mbcache.c
…
mnt_idmapping.c
…
mount.h
…
mpage.c
…
namei.c
fs: Fix kernel-doc warnings
2023-08-19 12:12:12 +02:00
namespace.c
…
nsfs.c
fs: convert to ctime accessor functions
2023-07-13 10:28:04 +02:00
open.c
v6.6-vfs.fchmodat2
2023-08-28 11:25:27 -07:00
pipe.c
v6.6-vfs.misc
2023-08-28 10:17:14 -07:00
pnode.c
…
pnode.h
…
posix_acl.c
fs: convert to ctime accessor functions
2023-07-13 10:28:04 +02:00
proc_namespace.c
…
read_write.c
fs: Fix one kernel-doc comment
2023-08-15 08:32:45 +02:00
readdir.c
vfs: get rid of old '->iterate' directory operation
2023-08-06 15:08:35 +02:00
remap_range.c
…
select.c
…
seq_file.c
…
signalfd.c
…
splice.c
- Some swap cleanups from Ma Wupeng ("fix WARN_ON in add_to_avail_list")
2023-08-29 14:25:26 -07:00
stack.c
fs: convert to ctime accessor functions
2023-07-13 10:28:04 +02:00
stat.c
vfs: mostly undo glibc turning 'fstat()' into 'fstatat(AT_EMPTY_PATH)'
2023-09-07 09:40:30 -07:00
statfs.c
…
super.c
fs: export sget_dev()
2023-08-31 12:47:15 +02:00
sync.c
…
sysctls.c
…
timerfd.c
…
userfaultfd.c
mm: userfaultfd: remove stale comment about core dump locking
2023-08-24 16:20:27 -07:00
utimes.c
…
xattr.c
tmpfs,xattr: GFP_KERNEL_ACCOUNT for simple xattrs
2023-08-22 10:57:46 +02:00