Messages in this thread | | | Date | Thu, 12 Jan 2023 15:15:46 -1000 | From | Tejun Heo <> | Subject | Re: [PATCH v2 1/2] blk-iocost: add refcounting for iocg |
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Hello,
On Fri, Jan 13, 2023 at 09:10:25AM +0800, Yu Kuai wrote: > > only activate the policy when the controller is actually enabled. So, idk. > > What's wrong with synchronizing the two removal paths? blkcg policies are > > combinations of cgroups and block device configurations, so having exit > > paths from both sides is kinda natural. > > I still can't figure out how to synchronizing them will a mutex. Maybe > I'm being foolish...
Hmm... can't you just use e.g. per-bdev mutex which is grabbed by both blkg_free_workfn() and blkcg_deactivate_policy()?
Thanks.
-- tejun
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