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authorLinus Torvalds <torvalds@linux-foundation.org>2014-01-16 08:23:34 +0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-01-16 08:23:34 +0700
commit70b23ce347c025a06339abd995b1df4a9fe096ba (patch)
tree4e1c929cf0f8e86a033980968dddff5e800c3fda
parenta9bdddb8dd711d70c5e0068fd8ad5ae5f4419359 (diff)
parentf9b0e058cbd04ada76b13afffa7e1df830543c24 (diff)
downloadlinux-70b23ce347c025a06339abd995b1df4a9fe096ba.tar.gz
Merge tag 'writeback-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux
Pull writeback fix from Wu Fengguang: "Fix data corruption on NFS writeback. It has been in linux-next for one month" * tag 'writeback-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux: writeback: Fix data corruption on NFS
-rw-r--r--fs/fs-writeback.c15
1 files changed, 9 insertions, 6 deletions
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 1f4a10ece2f..e0259a163f9 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -516,13 +516,16 @@ writeback_single_inode(struct inode *inode, struct bdi_writeback *wb,
}
WARN_ON(inode->i_state & I_SYNC);
/*
- * Skip inode if it is clean. We don't want to mess with writeback
- * lists in this function since flusher thread may be doing for example
- * sync in parallel and if we move the inode, it could get skipped. So
- * here we make sure inode is on some writeback list and leave it there
- * unless we have completely cleaned the inode.
+ * Skip inode if it is clean and we have no outstanding writeback in
+ * WB_SYNC_ALL mode. We don't want to mess with writeback lists in this
+ * function since flusher thread may be doing for example sync in
+ * parallel and if we move the inode, it could get skipped. So here we
+ * make sure inode is on some writeback list and leave it there unless
+ * we have completely cleaned the inode.
*/
- if (!(inode->i_state & I_DIRTY))
+ if (!(inode->i_state & I_DIRTY) &&
+ (wbc->sync_mode != WB_SYNC_ALL ||
+ !mapping_tagged(inode->i_mapping, PAGECACHE_TAG_WRITEBACK)))
goto out;
inode->i_state |= I_SYNC;
spin_unlock(&inode->i_lock);