Reviewed-by: Sage Weil <sage@xxxxxxxxxx>
On Fri, 10 Oct 2014, Ilya Dryomov wrote:
> 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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