btrfs: fix deadlock when writing out space cache

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If we fail to prepare our pages for whatever reason (out of memory in
our case) we need to make sure to drop the block_group->data_rwsem,
otherwise hilarity ensues.

Signed-off-by: Josef Bacik <jbacik@fb.com>
Reviewed-by: Omar Sandoval <osandov@fb.com>
Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ add label and use existing unlocking code ]
Signed-off-by: David Sterba <dsterba@suse.com>

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Josef Bacik 2017-11-15 16:20:52 -05:00 • committed by David Sterba

parent 8e138e0d92

commit b77000ed55

1 changed files with 2 additions and 1 deletions

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fs/btrfs/free-space-cache.c

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