linux-kernel - Re: [PATCH] mm,vmscan: Use accurate values for zone

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Date:	Wed, 21 Oct 2015 09:49:07 -0500 (CDT)
From:	Christoph Lameter <cl@...ux.com>
To:	Michal Hocko <mhocko@...nel.org>
cc:	Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	torvalds@...ux-foundation.org, 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: [PATCH] mm,vmscan: Use accurate values for zone_reclaimable()
 checks

On Wed, 21 Oct 2015, Michal Hocko wrote:

> Because all the WQ workers are stuck somewhere, maybe in the memory
> allocation which cannot make any progress and the vmstat update work is
> queued behind them.
>
> At least this is my current understanding.

Eww. Maybe need a queue that does not do such evil things as memory
allocation?

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