linux-kernel - Re: [RFC] mm/vmscan.c: avoid possible long latency caused by too_many

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Message-ID: <2ea3318a-b17c-ec4c-5425-cb93e079a994@linux.intel.com>
Date:   Thu, 22 Apr 2021 13:38:39 -0700
From:   Tim Chen <tim.c.chen@...ux.intel.com>
To:     Yu Zhao <yuzhao@...gle.com>
Cc:     Xing Zhengjun <zhengjun.xing@...ux.intel.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linux-MM <linux-mm@...ck.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Huang Ying <ying.huang@...el.com>,
        Shakeel Butt <shakeelb@...gle.com>,
        Michal Hocko <mhocko@...e.com>, wfg@...l.ustc.edu.cn
Subject: Re: [RFC] mm/vmscan.c: avoid possible long latency caused by
 too_many_isolated()



On 4/22/21 1:30 PM, Yu Zhao wrote:
> 
> HZ/10 is purely arbitrary but that's ok because we assume normally
> nobody hits it. If you do often, we need to figure out why and how not
> to hit it so often.
> 

Perhaps Zhengjun can test the proposed fix in his test case to see if the timeout value
makes any difference.

Tim