linux-kernel - Re: [PATCH v2] mm: vmscan: fix the page state calculation in too_many

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Message-ID: <20150116175745.GA22136@dhcp22.suse.cz>
Date:	Fri, 16 Jan 2015 18:57:45 +0100
From:	Michal Hocko <mhocko@...e.cz>
To:	Vinayak Menon <vinmenon@...eaurora.org>
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	akpm@...ux-foundation.org, hannes@...xchg.org,
	vdavydov@...allels.com, mgorman@...e.de, minchan@...nel.org,
	Christoph Lameter <cl@...two.org>
Subject: Re: [PATCH v2] mm: vmscan: fix the page state calculation in
 too_many_isolated

On Fri 16-01-15 16:49:22, Michal Hocko wrote:
[...]
> Why cannot we simply update the global counters from vmstat_shepherd
> directly?

OK, I should have checked the updating paths... This would be racy, so
update from remote is not an option without additional trickery (like
retries etc.) :/
-- 
Michal Hocko
SUSE Labs
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