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5079e1c0c8
generic/082 reports a bug as below:
__schedule+0x332/0xf60
schedule+0x6f/0xf0
schedule_timeout+0x23b/0x2a0
wait_for_completion+0x8f/0x140
f2fs_issue_checkpoint+0xfe/0x1b0
f2fs_sync_fs+0x9d/0xb0
sync_filesystem+0x87/0xb0
dquot_load_quota_sb+0x41b/0x460
dquot_load_quota_inode+0xa5/0x130
dquot_quota_on+0x4b/0x60
f2fs_quota_on+0xe3/0x1b0
do_quotactl+0x483/0x700
__x64_sys_quotactl+0x15c/0x310
do_syscall_64+0x3f/0x90
entry_SYSCALL_64_after_hwframe+0x72/0xdc
The root casue is race case as below:
Thread A Kworker IRQ
- write()
: write data to quota.user file
- writepages
- f2fs_submit_page_write
- __is_cp_guaranteed return false
- inc_page_count(F2FS_WB_DATA)
- submit_bio
- quotactl(Q_QUOTAON)
- f2fs_quota_on
- dquot_quota_on
- dquot_load_quota_inode
- vfs_setup_quota_inode
: inode->i_flags |= S_NOQUOTA
- f2fs_write_end_io
- __is_cp_guaranteed return true
- dec_page_count(F2FS_WB_CP_DATA)
- dquot_load_quota_sb
- f2fs_sync_fs
- f2fs_issue_checkpoint
- do_checkpoint
- f2fs_wait_on_all_pages(F2FS_WB_CP_DATA)
: loop due to F2FS_WB_CP_DATA count is negative
Calling filemap_fdatawrite() and filemap_fdatawait() to keep all data
clean before quota file setup.
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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|---|---|---|
| .. | ||
| acl.c | ||
| acl.h | ||
| checkpoint.c | ||
| compress.c | ||
| data.c | ||
| debug.c | ||
| dir.c | ||
| extent_cache.c | ||
| f2fs.h | ||
| file.c | ||
| gc.c | ||
| gc.h | ||
| hash.c | ||
| inline.c | ||
| inode.c | ||
| iostat.c | ||
| iostat.h | ||
| Kconfig | ||
| Makefile | ||
| namei.c | ||
| node.c | ||
| node.h | ||
| recovery.c | ||
| segment.c | ||
| segment.h | ||
| shrinker.c | ||
| super.c | ||
| sysfs.c | ||
| verity.c | ||
| xattr.c | ||
| xattr.h | ||