Messages in this thread | | | Date | Mon, 20 Nov 2017 10:25:26 +0100 | From | Michal Hocko <> | Subject | Re: [PATCH 1/2] mm,vmscan: Kill global shrinker lock. |
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On Fri 17-11-17 09:35:21, Christoph Hellwig wrote: > On Tue, Nov 14, 2017 at 06:37:42AM +0900, Tetsuo Handa wrote: > > Since do_shrink_slab() can reschedule, we cannot protect shrinker_list > > using one RCU section. But using atomic_inc()/atomic_dec() for each > > do_shrink_slab() call will not impact so much. > > But you could use SRCU..
Davidlohr has tried that already http://lkml.kernel.org/r/1434398602.1903.15.camel@stgolabs.net and failed. Doing SRCU inside core kernel is not seen with a great support... -- Michal Hocko SUSE Labs
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