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(parent: 3a90983) | patch
Btrfs: fix page->private races
authorChris Mason <chris.mason@oracle.com>
Thu, 10 Feb 2011 17:35:00 +0000 (12:35 -0500)
committerChris Mason <chris.mason@oracle.com>
Mon, 14 Feb 2011 18:03:52 +0000 (13:03 -0500)
commiteb14ab8ed24a0405fd056068b28c33a1cd846024
tree1451cad453a3ff66bc5369dc83daf7e3a50c4897tree | snapshot (tar.gz zip)
parent3a90983dbdcb2f4f48c0d771d8e5b4d88f27fae6commit | diff
Btrfs: fix page->private races

There is a race where btrfs_releasepage can drop the
page->private contents just as alloc_extent_buffer is setting
up pages for metadata.  Because of how the Btrfs page flags work,
this results in us skipping the crc on the page during IO.

This patch sovles the race by waiting until after the extent buffer
is inserted into the radix tree before it sets page private.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
fs/btrfs/disk-io.c diff | blob | blame | history
fs/btrfs/extent_io.c diff | blob | blame | history
Motorola kernel-slsi