This is a note to let you know that I've just added the patch titled md/raid0: apply base queue limits *before* disk_stack_limits to the 4.1-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: md-raid0-apply-base-queue-limits-before-disk_stack_limits.patch and it can be found in the queue-4.1 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 66eefe5de11db1e0d8f2edc3880d50e7c36a9d43 Mon Sep 17 00:00:00 2001 From: NeilBrown <neilb@xxxxxxxx> Date: Thu, 24 Sep 2015 15:47:47 +1000 Subject: md/raid0: apply base queue limits *before* disk_stack_limits From: NeilBrown <neilb@xxxxxxxx> commit 66eefe5de11db1e0d8f2edc3880d50e7c36a9d43 upstream. Calling e.g. blk_queue_max_hw_sectors() after calls to disk_stack_limits() discards the settings determined by disk_stack_limits(). So we need to make those calls first. Fixes: 199dc6ed5179 ("md/raid0: update queue parameter in a safer location.") Reported-by: Jes Sorensen <Jes.Sorensen@xxxxxxxxxx> Signed-off-by: NeilBrown <neilb@xxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/md/raid0.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) --- a/drivers/md/raid0.c +++ b/drivers/md/raid0.c @@ -431,12 +431,6 @@ static int raid0_run(struct mddev *mddev struct md_rdev *rdev; bool discard_supported = false; - rdev_for_each(rdev, mddev) { - disk_stack_limits(mddev->gendisk, rdev->bdev, - rdev->data_offset << 9); - if (blk_queue_discard(bdev_get_queue(rdev->bdev))) - discard_supported = true; - } blk_queue_max_hw_sectors(mddev->queue, mddev->chunk_sectors); blk_queue_max_write_same_sectors(mddev->queue, mddev->chunk_sectors); blk_queue_max_discard_sectors(mddev->queue, mddev->chunk_sectors); @@ -445,6 +439,12 @@ static int raid0_run(struct mddev *mddev blk_queue_io_opt(mddev->queue, (mddev->chunk_sectors << 9) * mddev->raid_disks); + rdev_for_each(rdev, mddev) { + disk_stack_limits(mddev->gendisk, rdev->bdev, + rdev->data_offset << 9); + if (blk_queue_discard(bdev_get_queue(rdev->bdev))) + discard_supported = true; + } if (!discard_supported) queue_flag_clear_unlocked(QUEUE_FLAG_DISCARD, mddev->queue); else Patches currently in stable-queue which might be from neilb@xxxxxxxx are queue-4.1/md-raid0-update-queue-parameter-in-a-safer-location.patch queue-4.1/md-raid0-apply-base-queue-limits-before-disk_stack_limits.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html