This is a note to let you know that I've just added the patch titled
Btrfs: fix filemap_flush call in btrfs_file_release
to the 3.16-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
btrfs-fix-filemap_flush-call-in-btrfs_file_release.patch
and it can be found in the queue-3.16 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From f6dc45c7a93a011dff6eb9b2ffda59c390c7705a Mon Sep 17 00:00:00 2001
From: Chris Mason <clm@xxxxxx>
Date: Wed, 20 Aug 2014 07:15:33 -0700
Subject: Btrfs: fix filemap_flush call in btrfs_file_release
From: Chris Mason <clm@xxxxxx>
commit f6dc45c7a93a011dff6eb9b2ffda59c390c7705a upstream.
We should only be flushing on close if the file was flagged as needing
it during truncate. I broke this with my ordered data vs transaction
commit deadlock fix.
Thanks to Miao Xie for catching this.
Signed-off-by: Chris Mason <clm@xxxxxx>
Reported-by: Miao Xie <miaox@xxxxxxxxxxxxxx>
Reported-by: Fengguang Wu <fengguang.wu@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/btrfs/file.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -1840,7 +1840,15 @@ int btrfs_release_file(struct inode *ino
{
if (filp->private_data)
btrfs_ioctl_trans_end(filp);
- filemap_flush(inode->i_mapping);
+ /*
+ * ordered_data_close is set by settattr when we are about to truncate
+ * a file from a non-zero size to a zero size. This tries to
+ * flush down new bytes that may have been written if the
+ * application were using truncate to replace a file in place.
+ */
+ if (test_and_clear_bit(BTRFS_INODE_ORDERED_DATA_CLOSE,
+ &BTRFS_I(inode)->runtime_flags))
+ filemap_flush(inode->i_mapping);
return 0;
}
Patches currently in stable-queue which might be from clm@xxxxxx are
queue-3.16/btrfs-fix-task-hang-under-heavy-compressed-write.patch
queue-3.16/btrfs-fix-memory-corruption-by-ulist_add_merge-on-32bit-arch.patch
queue-3.16/btrfs-fix-filemap_flush-call-in-btrfs_file_release.patch
queue-3.16/btrfs-fix-crash-on-endio-of-reading-corrupted-block.patch
queue-3.16/btrfs-fix-csum-tree-corruption-duplicate-and-outdated-checksums.patch
queue-3.16/btrfs-read-lock-extent-buffer-while-walking-backrefs.patch
queue-3.16/btrfs-fix-compressed-write-corruption-on-enospc.patch
queue-3.16/btrfs-disable-strict-file-flushes-for-renames-and-truncates.patch
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