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(parent: d313d7a) | patch
Btrfs: fix oops on page->mapping->host during writepage
authorChris Mason <chris.mason@oracle.com>
Mon, 20 Apr 2009 19:50:09 +0000 (15:50 -0400)
committerChris Mason <chris.mason@oracle.com>
Mon, 20 Apr 2009 19:53:09 +0000 (15:53 -0400)
commit11c8349b4eb68f2b04cd8ece577377e6c0e5dd4b
treebaeaabbe0a10d903ba3e0d6ff90ae9934912fc21tree | snapshot
parentd313d7a31a752c88f7288692bd98e66d0789779bcommit | diff
Btrfs: fix oops on page->mapping->host during writepage

The extent_io writepage call updates the writepage index in the inode
as it makes progress.  But, it was doing the update after unlocking the page,
which isn't legal because page->mapping can't be trusted once the page
is unlocked.

This lead to an oops, especially common with compression turned on.  The
fix here is to update the writeback index before unlocking the page.

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