Btrfs: do a full search everytime in btrfs_search_old_slot

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While running some snashot aware defrag tests I noticed I was panicing every
once and a while in key_search.  This is because of the optimization that says
if we find a key at slot 0 it will be at slot 0 all the way down the rest of the
tree.  This isn't the case for btrfs_search_old_slot since it will likely replay
changes to a buffer if something has changed since we took our sequence number.
So short circuit this optimization by setting prev_cmp to -1 every time we call
key_search so we will do our normal binary search.  With this patch I am no
longer seeing the panics I was seeing before.  Thanks,

Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>

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Josef Bacik 2013-09-24 14:09:34 -04:00 • committed by Chris Mason

parent 06ea65a398

commit d4b4087c43

1 changed files with 6 additions and 2 deletions

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fs/btrfs/ctree.c

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