Use local bio_list for gathering mirrored bios to reduce locking overhead. Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxx> --- drivers/md/raid1.c | 10 +++++++--- 1 files changed, 7 insertions(+), 3 deletions(-) diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c index 5d096096f958..39e9f54038a8 100644 --- a/drivers/md/raid1.c +++ b/drivers/md/raid1.c @@ -707,6 +707,7 @@ static int make_request(mddev_t *mddev, struct bio * bio) const unsigned long do_flush_fua = (bio->bi_rw & (REQ_FLUSH | REQ_FUA)); mdk_rdev_t *blocked_rdev; int plugged; + struct bio_list write_list; /* * Register the new request and wait if the reconstruction @@ -801,6 +802,7 @@ static int make_request(mddev_t *mddev, struct bio * bio) plugged = mddev_check_plugged(mddev); disks = conf->raid_disks; + bio_list_init(&write_list); retry_write: blocked_rdev = NULL; rcu_read_lock(); @@ -894,10 +896,12 @@ static int make_request(mddev_t *mddev, struct bio * bio) } atomic_inc(&r1_bio->remaining); - spin_lock_irqsave(&conf->device_lock, flags); - bio_list_add(&conf->pending_bio_list, mbio); - spin_unlock_irqrestore(&conf->device_lock, flags); + bio_list_add(&write_list, mbio); } + spin_lock_irqsave(&conf->device_lock, flags); + bio_list_merge(&conf->pending_bio_list, &write_list); + spin_unlock_irqrestore(&conf->device_lock, flags); + r1_bio_write_done(r1_bio); /* In case raid1d snuck in to freeze_array */ -- 1.7.5.2 -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
