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Date: Thu, 31 Mar 2022 18:44:31 +0700 From: Bagas Sanjaya <bagasdotme@...il.com> To: cgel.zte@...il.com, akpm@...ux-foundation.org, david@...hat.com, willy@...radead.org Cc: corbet@....net, yang.yang29@....com.cn, yang.shi@...ux.alibaba.com, dave.hansen@...ux.intel.com, saravanand@...com, minchan@...nel.org, linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org, linux-mm@...ck.org, jhubbard@...dia.com, xu xin <xu.xin16@....com.cn>, Ran Xiaokai <ran.xiaokai@....com.cn> Subject: Re: [PATCH v5] mm/vmstat: add events for ksm cow On 31/03/22 10.56, cgel.zte@...il.com wrote: > +Monitoring KSM events > +===================== > + > +There are some counters in /proc/vmstat that may be used to monitor KSM events. > +KSM might help save memory, it's a tradeoff by may suffering delay on KSM COW > +or on swapping in copy. Those events could help users evaluate whether or how > +to use KSM. For example, if cow_ksm increases too fast, user may decrease the > +range of madvise(, , MADV_MERGEABLE). > + Did you mean "tradeoff between possible delay on KSM COW and swapping in copy"? -- An old man doll... just what I always wanted! - Clara
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