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authorIlya Dryomov <idryomov@redhat.com>2014-10-10 18:36:07 +0400
committerSage Weil <sage@redhat.com>2014-10-14 12:57:05 -0700
commit792c3a914910bd34302c5345578f85cfcb5e2c01 (patch)
tree468b46ac85092eb3b0e728c7614a753855b68722 /drivers/block
parentf9865f06f7f18c6661c88d0511f05c48612319cc (diff)
downloadlwn-792c3a914910bd34302c5345578f85cfcb5e2c01.tar.gz
lwn-792c3a914910bd34302c5345578f85cfcb5e2c01.zip
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>
Diffstat (limited to 'drivers/block')
-rw-r--r--drivers/block/rbd.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 7712ae65753c..0a54c588e433 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -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;