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Btrfs: free csums when we're done scrubbing an extent

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A user reported scrub taking up an unreasonable amount of ram as it ran.  This
is because we lookup the csums for the extent we're scrubbing but don't free it
up until after we're done with the scrub, which means we can take up a whole lot
of ram.  This patch fixes this by dropping the csums once we're done with the
extent we've scrubbed.  The user reported this to fix their problem.  Thanks,

Reported-and-tested-by: Remco Hosman <remco@hosman.xs4all.nl>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
This commit is contained in:
Josef Bacik 2013-06-10 12:59:04 +00:00
parent 1be41b78bc
commit d88d46c6e0
1 changed files with 1 additions and 0 deletions
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fs/btrfs/scrub.c
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@ -2505,6 +2505,7 @@ static noinline_for_stack int scrub_stripe(struct scrub_ctx *sctx,
if (ret)
goto out;
scrub_free_csums(sctx);
if (extent_logical + extent_len <
key.objectid + bytes) {
logical += increment;