From: Jan Kara Date: Fri, 13 Dec 2013 20:21:26 +0000 (+0800) Subject: writeback: Fix data corruption on NFS X-Git-Tag: v3.13~13^2 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f9b0e058cbd04ada76b13afffa7e1df830543c24;p=pandora-kernel.git writeback: Fix data corruption on NFS 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. CC: stable@vger.kernel.org # >= 3.5 Fixes: 4f8ad655dbc82cf05d2edc11e66b78a42d38bf93 Reported-and-tested-by: Dan Duval Signed-off-by: Jan Kara --- Reading git-diff-tree failed