iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
linux/fs/btrfs
History
Wang Shilong bca1a29003 Btrfs: add a reschedule point in btrfs_find_all_roots() 
I can easily trigger the following warnings when enabling quota
in my virtual machine(running Opensuse), Steps are firstly creating
a subvolume full of fragment extents, and then create many snapshots
(500 in my test case).

[ 2362.808459] BUG: soft lockup - CPU#0 stuck for 22s! [btrfs-qgroup-re:1970]

[ 2362.809023] task: e4af8450 ti: e371c000 task.ti: e371c000
[ 2362.809026] EIP: 0060:[<fa38f4ae>] EFLAGS: 00000246 CPU: 0
[ 2362.809049] EIP is at __merge_refs+0x5e/0x100 [btrfs]
[ 2362.809051] EAX: 00000000 EBX: cfadbcf0 ECX: 00000000 EDX: cfadbcb0
[ 2362.809052] ESI: dd8d3370 EDI: e371dde0 EBP: e371dd6c ESP: e371dd5c
[ 2362.809054]  DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
[ 2362.809055] CR0: 80050033 CR2: ac454d50 CR3: 009a9000 CR4: 001407d0
[ 2362.809099] Stack:
[ 2362.809100]  00000001 e371dde0 dfcc6890 f29f8000 e371de28 fa39016d 00000011 00000001
[ 2362.809105]  99bfc000 00000000 93928000 00000000 00000001 00000050 e371dda8 00000001
[ 2362.809109]  f3a31000 f3413000 00000001 e371ddb8 000040a8 00000202 00000000 00000023
[ 2362.809113] Call Trace:
[ 2362.809136]  [<fa39016d>] find_parent_nodes+0x34d/0x1280 [btrfs]
[ 2362.809156]  [<fa391172>] btrfs_find_all_roots+0xb2/0x110 [btrfs]
[ 2362.809174]  [<fa3934a8>] btrfs_qgroup_rescan_worker+0x358/0x7a0 [btrfs]
[ 2362.809180]  [<c024d0ce>] ? lock_timer_base.isra.39+0x1e/0x40
[ 2362.809199]  [<fa3648df>] worker_loop+0xff/0x470 [btrfs]
[ 2362.809204]  [<c027a88a>] ? __wake_up_locked+0x1a/0x20
[ 2362.809221]  [<fa3647e0>] ? btrfs_queue_worker+0x2b0/0x2b0 [btrfs]
[ 2362.809225]  [<c025ebbc>] kthread+0x9c/0xb0
[ 2362.809229]  [<c06b487b>] ret_from_kernel_thread+0x1b/0x30
[ 2362.809233]  [<c025eb20>] ? kthread_create_on_node+0x110/0x110

By adding a reschedule point at the end of btrfs_find_all_roots(), i no longer
hit these warnings.

Cc: Josef Bacik <jbacik@fb.com>
Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com>
Reviewed-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Chris Mason <clm@fb.com>
2014-01-29 07:06:25 -08:00
..
tests
Btrfs: convert printk to btrfs_ and fix BTRFS prefix
2014-01-28 13:20:05 -08:00
acl.c
btrfs: remove dead code
2014-01-28 13:19:50 -08:00
async-thread.c
Btrfs: fix __btrfs_start_workers retval
2013-11-20 20:42:11 -05:00
async-thread.h
Btrfs: eliminate races in worker stopping code
2013-10-04 16:02:13 -04:00
backref.c
Btrfs: add a reschedule point in btrfs_find_all_roots()
2014-01-29 07:06:25 -08:00
backref.h
Btrfs: allocate prelim_ref with a slab allocater
2013-09-01 08:16:27 -04:00
btrfs_inode.h
Btrfs: add support for inode properties
2014-01-28 13:20:24 -08:00
check-integrity.c
Btrfs: fix check-integrity to look at the referenced data properly
2014-01-28 13:19:21 -08:00
check-integrity.h
block: submit_bio_wait() conversions
2013-11-24 16:33:41 -07:00
compression.c
Btrfs: convert printk to btrfs_ and fix BTRFS prefix
2014-01-28 13:20:05 -08:00
compression.h
btrfs: make static code static & remove dead code
2013-05-06 15:55:23 -04:00
ctree.c
Btrfs: fix to search previous metadata extent item since skinny metadata
2014-01-28 13:20:33 -08:00
ctree.h
Btrfs: change the members' order of btrfs_space_info structure to reduce the cache miss
2014-01-28 13:20:38 -08:00
delayed-inode.c
Btrfs: introduce the delayed inode ref deletion for the single link inode
2014-01-28 13:20:09 -08:00
delayed-inode.h
Btrfs: introduce the delayed inode ref deletion for the single link inode
2014-01-28 13:20:09 -08:00
delayed-ref.c
Btrfs: attach delayed ref updates to delayed ref heads
2014-01-28 13:20:25 -08:00
delayed-ref.h
Btrfs: attach delayed ref updates to delayed ref heads
2014-01-28 13:20:25 -08:00
dev-replace.c
Btrfs: convert printk to btrfs_ and fix BTRFS prefix
2014-01-28 13:20:05 -08:00
dev-replace.h
Btrfs: add new sources for device replace code
2012-12-12 17:15:41 -05:00
dir-item.c
Btrfs: convert printk to btrfs_ and fix BTRFS prefix
2014-01-28 13:20:05 -08:00
disk-io.c
btrfs: undo sysfs when open_ctree() fails
2014-01-28 13:20:44 -08:00
disk-io.h
Btrfs: add a sanity test for btrfs_split_item
2013-11-11 21:51:02 -05:00
export.c
btrfs: remove fs/btrfs/compat.h
2013-11-11 22:03:19 -05:00
export.h
…
extent_io.c
Btrfs: convert printk to btrfs_ and fix BTRFS prefix
2014-01-28 13:20:05 -08:00
extent_io.h
Btrfs: move the extent buffer radix tree into the fs_info
2014-01-28 13:19:55 -08:00
extent_map.c
Btrfs: fix extent_map block_len after merging
2014-01-28 13:19:51 -08:00
extent_map.h
btrfs: Enclose macros with complex values within parenthesis
2013-11-11 22:12:06 -05:00
extent-tree.c
Btrfs: fix wrong block group in trace during the free space allocation
2014-01-28 13:20:40 -08:00
file-item.c
Btrfs: convert printk to btrfs_ and fix BTRFS prefix
2014-01-28 13:20:05 -08:00
file.c
Btrfs: fix the race between write back and nocow buffered write
2014-01-28 13:20:28 -08:00
free-space-cache.c
Btrfs: convert printk to btrfs_ and fix BTRFS prefix
2014-01-28 13:20:05 -08:00
free-space-cache.h
Btrfs: remove path arg from btrfs_truncate_free_space_cache
2013-11-11 21:51:33 -05:00
hash.c
Btrfs: fix btrfs boot when compiled as built-in
2014-01-28 13:20:31 -08:00
hash.h
Btrfs: fix btrfs boot when compiled as built-in
2014-01-28 13:20:31 -08:00
inode-item.c
btrfs: cleanup: removed unused 'btrfs_get_inode_ref_index'
2014-01-28 13:19:39 -08:00
inode-map.c
btrfs: Use WARN_ON()'s return value in place of WARN_ON(1)
2013-11-11 22:11:53 -05:00
inode-map.h
Btrfs: Support reading/writing on disk free ino cache
2011-04-25 16:46:11 +08:00
inode.c
btrfs: fix warning while merging two adjacent extents
2014-01-29 07:06:22 -08:00
ioctl.c
btrfs: fix defrag 32-bit integer overflow
2014-01-28 13:20:43 -08:00
Kconfig
Btrfs: fix btrfs boot when compiled as built-in
2014-01-28 13:20:31 -08:00
locking.c
btrfs: make static code static & remove dead code
2013-05-06 15:55:23 -04:00
locking.h
Btrfs: remove btrfs_try_spin_lock
2013-03-14 14:57:10 -04:00
lzo.c
Btrfs: convert printk to btrfs_ and fix BTRFS prefix
2014-01-28 13:20:05 -08:00
Makefile
Btrfs: fix btrfs boot when compiled as built-in
2014-01-28 13:20:31 -08:00
math.h
Btrfs: cleanup duplicated division functions
2012-12-11 13:31:30 -05:00
ordered-data.c
Btrfs: convert printk to btrfs_ and fix BTRFS prefix
2014-01-28 13:20:05 -08:00
ordered-data.h
Btrfs: don't wait for the completion of all the ordered extents
2013-11-11 22:13:44 -05:00
orphan.c
btrfs: expand btrfs_find_item() to include find_orphan_item functionality
2014-01-28 13:19:37 -08:00
print-tree.c
Btrfs: convert printk to btrfs_ and fix BTRFS prefix
2014-01-28 13:20:05 -08:00
print-tree.h
btrfs: make static code static & remove dead code
2013-05-06 15:55:23 -04:00
props.c
Btrfs: add support for inode properties
2014-01-28 13:20:24 -08:00
props.h
Btrfs: add support for inode properties
2014-01-28 13:20:24 -08:00
qgroup.c
Btrfs: fix qgroup rescan to work with skinny metadata
2014-01-28 13:20:27 -08:00
raid56.c
btrfs: remove fs/btrfs/compat.h
2013-11-11 22:03:19 -05:00
raid56.h
Btrfs: RAID5 and RAID6
2013-02-01 14:24:23 -05:00
rcu-string.h
Btrfs: use rcu to protect device->name
2012-06-14 21:29:16 -04:00
reada.c
Btrfs: convert printk to btrfs_ and fix BTRFS prefix
2014-01-28 13:20:05 -08:00
relocation.c
Btrfs: fix an oops when we fail to relocate tree blocks
2014-01-28 13:20:14 -08:00
root-tree.c
Btrfs: convert printk to btrfs_ and fix BTRFS prefix
2014-01-28 13:20:05 -08:00
scrub.c
Btrfs: fix to search previous metadata extent item since skinny metadata
2014-01-28 13:20:33 -08:00
send.c
Btrfs: make send's file extent item search more efficient
2014-01-29 07:06:24 -08:00
send.h
btrfs: make static code static & remove dead code
2013-05-06 15:55:23 -04:00
struct-funcs.c
Btrfs: rewrite BTRFS_SETGET_FUNCS
2012-07-23 16:28:06 -04:00
super.c
btrfs: Cleanup the btrfs_parse_options for remount.
2014-01-28 13:20:34 -08:00
sysfs.c
btrfs: sysfs: list the NO_HOLES feature
2014-01-28 13:20:42 -08:00
sysfs.h
btrfs: publish allocation data in sysfs
2014-01-28 13:19:29 -08:00
transaction.c
btrfs: Add noinode_cache mount option
2014-01-28 13:20:33 -08:00
transaction.h
Btrfs: make fsync latency less sucky
2014-01-28 13:20:25 -08:00
tree-defrag.c
Btrfs: cleanup dead code of defragment
2013-11-11 21:59:45 -05:00
tree-log.c
Btrfs: flush the dirty pages of the ordered extent aggressively during logging csum
2014-01-28 13:20:37 -08:00
tree-log.h
btrfs: make static code static & remove dead code
2013-05-06 15:55:23 -04:00
ulist.c
Btrfs: optimize to remove unnecessary removal with ulist reallocation
2014-01-28 13:20:30 -08:00
ulist.h
Btrfs: add a rb_tree to improve performance of ulist search
2013-05-06 15:54:44 -04:00
uuid-tree.c
Btrfs: convert printk to btrfs_ and fix BTRFS prefix
2014-01-28 13:20:05 -08:00
volumes.c
Btrfs: convert printk to btrfs_ and fix BTRFS prefix
2014-01-28 13:20:05 -08:00
volumes.h
btrfs: Pack struct btrfs_device
2013-11-11 22:11:26 -05:00
xattr.c
Btrfs: add support for inode properties
2014-01-28 13:20:24 -08:00
xattr.h
fs/vfs/security: pass last path component to LSM on inode creation
2011-02-01 11:12:29 -05:00
zlib.c
Btrfs: convert printk to btrfs_ and fix BTRFS prefix
2014-01-28 13:20:05 -08:00