commit eb14ab8ed24a0405fd056068b28c33a1cd846024
author Chris Mason <chris.mason@oracle.com> Thu Feb 10 12:35:00 2011 -0500
committer Chris Mason <chris.mason@oracle.com> Mon Feb 14 13:03:52 2011 -0500
tree 1451cad453a3ff66bc5369dc83daf7e3a50c4897
parent 3a90983dbdcb2f4f48c0d771d8e5b4d88f27fae6

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>