Hello, Bart. On Tue, Jun 07, 2016 at 01:00:13PM -0700, Bart Van Assche wrote: > > > > srp_remove_wq is used for SRP target port removal work only. This work is > > > > neither queued from inside a shrinker nor by the page writeback code so I > > > > think it is safe to drop WQ_MEM_RECLAIM. > > > > > > It should be able to use system_wq then. > > > > No. I have tried that but that resulted in a deadlock. > > See also commit bcc059103591 for the details. So, create_workqueue() limits concurrency to 1 per cpu and if you have a dependency between two work items and they get scheduled on the same cpu they can deadlock. system_wq doesn't have that restriction and should be fine, AFAICS. Thanks! -- tejun -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
