We are responsible hold write count before any fs-speciffic modifications
This patch should fix following warning:
WARNING: at fs/ext4/ext4_jbd2.c:50 __ext4_journal_start_sb+0x132/0x240()
Call Trace:
[<ffffffff8106fb0d>] warn_slowpath_common+0xad/0xf0
[<ffffffff81344f97>] ? ext4_da_write_begin+0x277/0x4f0
[<ffffffff8106fb6a>] warn_slowpath_null+0x1a/0x20
[<ffffffff8138a122>] __ext4_journal_start_sb+0x132/0x240
[<ffffffff81344f97>] ext4_da_write_begin+0x277/0x4f0
[<ffffffff811a0668>] generic_perform_write+0x148/0x3c0
[<ffffffff811a0944>] generic_file_buffered_write+0x64/0xd0
[<ffffffff811a5c90>] __generic_file_aio_write+0x4d0/0x750
[<ffffffff81335da3>] ext4_file_dio_write+0x253/0x4e0
[<ffffffff81336101>] ext4_file_write+0xd1/0x190
[<ffffffff81243072>] do_sync_write+0xb2/0x120
[<ffffffff8124332c>] ? rw_verify_area+0x12c/0x270
[<ffffffff812435f2>] vfs_write+0x182/0x1f0
[<ffffffff818ff605>] ? sysret_check+0x22/0x5d
[<ffffffff812445f4>] sys_write+0x94/0xd0
[<ffffffff818ff5d9>] system_call_fastpath+0x16/0x1b
Signed-off-by: Dmitry Monakhov <dmonakhov@xxxxxxxxxx>
---
fs/ext4/file.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index 7e85a10..99918e4 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -106,6 +106,7 @@ ext4_file_dio_write(struct kiocb *iocb, const struct iovec *iov,
!is_sync_kiocb(iocb))
unaligned_aio = ext4_unaligned_aio(inode, iov, nr_segs, pos);
+ sb_start_write(inode->i_sb);
/* Unaligned direct AIO must be serialized; see comment above */
if (unaligned_aio) {
mutex_lock(ext4_aio_mutex(inode));
@@ -160,6 +161,7 @@ ext4_file_dio_write(struct kiocb *iocb, const struct iovec *iov,
if (unaligned_aio)
mutex_unlock(ext4_aio_mutex(inode));
+ sb_end_write(inode->i_sb);
return ret;
}
--
1.7.1
--
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