Commit 792c3a91 authored Oct 10, 2014 by Ilya Dryomov Committed by Sage Weil Oct 14, 2014

rbd: rbd workqueues need a resque worker



Need to use WQ_MEM_RECLAIM for our workqueues to prevent I/O lockups
under memory pressure - we sit on the memory reclaim path.

Cc: stable@vger.kernel.org # 3.17, needs backporting for 3.16
Signed-off-by: Ilya Dryomov <idryomov@redhat.com>
Tested-by: Micha Krause <micha@krausam.de>
Reviewed-by: Sage Weil <sage@redhat.com>

parent f9865f06

drivers/block/rbd.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -5242,7 +5242,8 @@ static int rbd_dev_device_setup(struct rbd_device *rbd_dev)
		set_capacity(rbd_dev->disk, rbd_dev->mapping.size / SECTOR_SIZE);
		set_disk_ro(rbd_dev->disk, rbd_dev->mapping.read_only);

		rbd_dev->rq_wq = alloc_workqueue("%s", 0, 0, rbd_dev->disk->disk_name);
		rbd_dev->rq_wq = alloc_workqueue("%s", WQ_MEM_RECLAIM, 0,
		rbd_dev->disk->disk_name);
		if (!rbd_dev->rq_wq) {
		ret = -ENOMEM;
		goto err_out_mapping;