Messages in this thread | | | Date | Thu, 25 Nov 2021 03:30:44 +0000 | From | Matthew Wilcox <> | Subject | Re: [PATCH] mm: reduce spinlock contention in release_pages() |
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On Thu, Nov 25, 2021 at 11:24:02AM +0800, Hao Lee wrote: > On Thu, Nov 25, 2021 at 12:31 AM Michal Hocko <mhocko@suse.com> wrote: > > We do batch currently so no single task should be > > able to monopolize the cpu for too long. Why this is not sufficient? > > uncharge and unref indeed take advantage of the batch process, but > del_from_lru needs more time to complete. Several tasks will contend > spinlock in the loop if nr is very large.
Is SWAP_CLUSTER_MAX too large? Or does your architecture's spinlock implementation need to be fixed?
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