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| author | Jan Kara <jack@suse.cz> | 2013-12-13 20:21:26 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-01-25 16:49:28 (GMT) |
| commit | 0e177339b85af46ba007c94ee2ffa944fcc9b98d (patch) | |
| tree | 2c712db59c9ff54d4ff1b81821a2dd3328768511 /security | |
| parent | 19519d5b684f9471bc9666858a1a0e7768985821 (diff) | |
| download | linux-fsl-qoriq-0e177339b85af46ba007c94ee2ffa944fcc9b98d.tar.xz | |
writeback: Fix data corruption on NFS
commit f9b0e058cbd04ada76b13afffa7e1df830543c24 upstream.
Commit 4f8ad655dbc8 "writeback: Refactor writeback_single_inode()" added
a condition to skip clean inode. However this is wrong in WB_SYNC_ALL
mode because there we also want to wait for outstanding writeback on
possibly clean inode. This was causing occasional data corruption issues
on NFS because it uses sync_inode() to make sure all outstanding writes
are flushed to the server before truncating the inode and with
sync_inode() returning prematurely file was sometimes extended back
by an outstanding write after it was truncated.
So modify the test to also check for pages under writeback in
WB_SYNC_ALL mode.
Fixes: 4f8ad655dbc82cf05d2edc11e66b78a42d38bf93
Reported-and-tested-by: Dan Duval <dan.duval@oracle.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'security')
0 files changed, 0 insertions, 0 deletions