Messages in this thread | | | Date | Wed, 7 Jul 2021 05:11:33 -1000 | From | Tejun Heo <> | Subject | Re: [PATCH V2] blk-cgroup: prevent rcu_sched detected stalls warnings while iterating blkgs |
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On Wed, Jul 07, 2021 at 09:56:49AM +0800, Yu Kuai wrote: > We run a test that create millions of cgroups and blkgs, and then trigger > blkg_destroy_all(). blkg_destroy_all() will hold spin lock for a long > time in such situation. Thus release the lock when a batch of blkgs are > destroyed. > > blkcg_activate_policy() and blkcg_deactivate_policy() might have the > same problem, however, as they are basically only called from module > init/exit paths, let's leave them alone for now. > > Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Acked-by: Tejun Heo <tj@kernel.org>
Thanks.
-- tejun
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