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

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Date:	Thu, 22 Oct 2015 08:39:11 -0500 (CDT)
From:	Christoph Lameter <cl@...ux.com>
To:	Tejun Heo <htejun@...il.com>
cc:	Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>,
	mhocko@...nel.org, 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: [PATCH] mm,vmscan: Use accurate values for zone_reclaimable()
 checks

On Thu, 22 Oct 2015, Tetsuo Handa wrote:

> The problem would be that the "struct task_struct" to execute vmstat_update
> job does not exist, and will not be able to create one on demand because we
> are stuck at __GFP_WAIT allocation. Therefore adding a dedicated kernel
> thread for vmstat_update job would work. But ...

Yuck. Can someone please get this major screwup out of the work queue
subsystem? Tejun?

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