Tejun Heo <tj@xxxxxxxxxx> writes: > Hello, > > cfq has always charged all async IOs to the root cgroup. It didn't > have much choice as writeback didn't know about cgroups and there was > no way to tell who to blame for a given writeback IO. writeback > finally grew support for cgroups and now tags each writeback IO with > the appropriate cgroup to charge it against. > > This patchset updates cfq so that it follows the blkcg each bio is > tagged with. Async cfq_queues are now shared across cfq_group, which > is per-cgroup, instead of per-request_queue cfq_data. This makes all > IOs follow the weight based IO resource distribution implemented by > cfq. > > This patchset contains the following 8 patches. > > 0001-cfq-iosched-simplify-control-flow-in-cfq_get_queue.patch > 0002-cfq-iosched-fix-async-oom-queue-handling.patch > 0003-cfq-iosched-fix-oom-cfq_queue-ref-leak-in-cfq_set_re.patch > 0004-cfq-iosched-minor-cleanups.patch > 0005-cfq-iosched-remove-gfp_mask-from-cfq_find_alloc_queu.patch > 0006-cfq-iosched-move-cfq_group-determination-from-cfq_fi.patch > 0007-cfq-iosched-fold-cfq_find_alloc_queue-into-cfq_get_q.patch > 0008-cfq-iosched-charge-async-IOs-to-the-appropriate-blkc.patch Hi, Tejun, Assuming you're ok with dropping patch 5, I'll review patches 6-8 once they've been reworked to account for that. I took a look at them, and they look OK to me. But, if they are going to change, I'd rather wait to ack the final versions. Cheers, Jeff -- To unsubscribe from this list: send the line "unsubscribe cgroups" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
