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@xxxxxxxxxxxxxxx # 3.17, needs backporting for 3.16
Signed-off-by: Ilya Dryomov <idryomov@xxxxxxxxxx>
Tested-by: Micha Krause <micha@xxxxxxxxxx>
---
drivers/block/rbd.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
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;
--
1.7.10.4
--
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