From: Mikulas Patocka <mpatocka@redhat.com>
Date: Sun, 29 May 2011 12:02:58 +0000 (+0100)
Subject: dm kcopyd: avoid pointless job splitting
X-Git-Tag: v3.0-rc1~9^2~7
X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=a705a34a565a5445bf731bd8006d51ea4d2b4236;p=~emulex%2Finfiniband.git

dm kcopyd: avoid pointless job splitting

Don't split SUB_JOB_SIZE jobs

If the job size equals SUB_JOB_SIZE, there is no point in splitting it.
Splitting it just unnecessarily wastes time, because the split job size
is SUB_JOB_SIZE too.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
---

diff --git a/drivers/md/dm-kcopyd.c b/drivers/md/dm-kcopyd.c
index 1bb73a13ca4..505b6f5cd38 100644
--- a/drivers/md/dm-kcopyd.c
+++ b/drivers/md/dm-kcopyd.c
@@ -578,7 +578,7 @@ int dm_kcopyd_copy(struct dm_kcopyd_client *kc, struct dm_io_region *from,
 	job->fn = fn;
 	job->context = context;
 
-	if (job->source.count < SUB_JOB_SIZE)
+	if (job->source.count <= SUB_JOB_SIZE)
 		dispatch_job(job);
 
 	else {