| From | Luis Henriques <> | Subject | [PATCH 3.16.y-ckt 146/254] rbd: rbd workqueues need a resque worker | Date | Tue, 25 Nov 2014 10:38:16 +0000 |
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3.16.7-ckt2 -stable review patch. If anyone has any objections, please let me know.
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From: Ilya Dryomov <idryomov@redhat.com>
commit 792c3a914910bd34302c5345578f85cfcb5e2c01 upstream.
Need to use WQ_MEM_RECLAIM for our workqueues to prevent I/O lockups under memory pressure - we sit on the memory reclaim path.
Signed-off-by: Ilya Dryomov <idryomov@redhat.com> Tested-by: Micha Krause <micha@krausam.de> Reviewed-by: Sage Weil <sage@redhat.com> Signed-off-by: Luis Henriques <luis.henriques@canonical.com> --- 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 5c38fe1f4b85..3d2b99a15f62 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -5103,7 +5103,8 @@ 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; -- 2.1.0
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