LU-15 slow IO with read-intense application

[fs/lustre-release.git] / lustre / kernel_patches / patches / raid5-mmp-unplug-dev.patch

diff --git a/lustre/kernel_patches/patches/raid5-mmp-unplug-dev.patch b/lustre/kernel_patches/patches/raid5-mmp-unplug-dev.patch
index 0334abd..cc25153 100644 (file)
--- a/lustre/kernel_patches/patches/raid5-mmp-unplug-dev.patch
+++ b/lustre/kernel_patches/patches/raid5-mmp-unplug-dev.patch
@@ -1,8 +1,8 @@
-Index: linux-2.6.22.14/drivers/md/raid5.c
+Index: linux-2.6.18-128.1.6/drivers/md/raid5.c
 ===================================================================
---- linux-2.6.22.14.orig/drivers/md/raid5.c
-+++ linux-2.6.22.14/drivers/md/raid5.c
-@@ -1268,6 +1268,8 @@ static int add_stripe_bio(struct stripe_
+--- linux-2.6.18-128.1.6.orig/drivers/md/raid5.c       2009-06-02 23:24:55.000000000 -0600
++++ linux-2.6.18-128.1.6/drivers/md/raid5.c    2009-06-02 23:27:21.000000000 -0600
+@@ -1456,6 +1456,8 @@
                bi->bi_next = *bip;
        *bip = bi;
        bi->bi_phys_segments ++;
@@ -11,9 +11,9 @@ Index: linux-2.6.22.14/drivers/md/raid5.c
        spin_unlock_irq(&conf->device_lock);
        spin_unlock(&sh->lock);
  
-@@ -2972,6 +2974,8 @@ static int make_request(request_queue_t 
-                             test_bit(BIO_UPTODATE, &bi->bi_flags)
-                               ? 0 : -EIO);
+@@ -3012,6 +3014,8 @@
+               bi->bi_size = 0;
+               bi->bi_end_io(bi, bytes, 0);
        }
 +      if (bio_sync(bi))
 +              raid5_unplug_device(q);