linux-kernel - Re: Make vmstat deferrable again (was Re: [PATCH] mm,vmscan: Use accurate values for zone

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Message-ID: <alpine.DEB.2.20.1510231109510.14715@east.gentwo.org>
Date:	Fri, 23 Oct 2015 11:10:38 -0500 (CDT)
From:	Christoph Lameter <cl@...ux.com>
To:	Sergey Senozhatsky <sergey.senozhatsky@...il.com>
cc:	Michal Hocko <mhocko@...nel.org>, Tejun Heo <htejun@...il.com>,
	Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	torvalds@...ux-foundation.org,
	David Rientjes <rientjes@...gle.com>, oleg@...hat.com,
	kwalker@...hat.com, akpm@...ux-foundation.org, hannes@...xchg.org,
	vdavydov@...allels.com, skozina@...hat.com, mgorman@...e.de,
	riel@...hat.com
Subject: Re: Make vmstat deferrable again (was Re: [PATCH] mm,vmscan: Use
 accurate values for zone_reclaimable() checks)

On Fri, 23 Oct 2015, Sergey Senozhatsky wrote:

> by the way, tick_nohz_stop_sched_tick() receives cpu from __tick_nohz_idle_enter().
> do you want to pass it to quiet_vmstat()?

No this is quite wrong at this point. quiet_vmstat() needs to be called
from the cpu going into idle state.
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