Commit d88d46c6 authored Jun 10, 2013 by Josef Bacik

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

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>

parent 1be41b78

fs/btrfs/scrub.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -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;