linux-kernel - Re: [RFC PATCH v3] tick/sched: Ensure quiet_vmstat() is called when the idle tick was stopped too

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Message-ID: <20220425145109.td4b7npcom4xgcli@ava.usersys.com>
Date:   Mon, 25 Apr 2022 15:51:09 +0100
From:   Aaron Tomlin <atomlin@...hat.com>
To:     Christoph Lameter <cl@...two.de>
Cc:     Peter Zijlstra <peterz@...radead.org>, frederic@...nel.org,
        mtosatti@...hat.com, tglx@...utronix.de, mingo@...nel.org,
        pauld@...hat.com, neelx@...hat.com, oleksandr@...alenko.name,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [RFC PATCH v3] tick/sched: Ensure quiet_vmstat() is called when
 the idle tick was stopped too

On Mon 2022-04-25 16:06 +0200, Christoph Lameter wrote:
> It may depend though on how long the idle periods are. Do we have
> statistics on the duration? Always folding the vmstat deltas may also
> increase the length of the idle periods.

Unfortunately I do not. I noticed that this situation can occur via source
code and vmcore analysis.


Kind regards,

-- 
Aaron Tomlin