Re: [PATCH] mm: reduce spinlock contention in release_pages()
From: Matthew Wilcox <hidden>
Date: 2021-11-25 03:32:54
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linux-mm, lkml
On Thu, Nov 25, 2021 at 11:24:02AM +0800, Hao Lee wrote:
On Thu, Nov 25, 2021 at 12:31 AM Michal Hocko [off-list ref] wrote:quoted
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?