linux-kernel - Re: [RFC v2 0/2] vmevent: A bit reworked pressure attribute + docs + man page

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Message-ID: <20121025092305.GA32417@lizard>
Date:	Thu, 25 Oct 2012 02:23:05 -0700
From:	Anton Vorontsov <anton.vorontsov@...aro.org>
To:	Minchan Kim <minchan@...nel.org>
Cc:	Mel Gorman <mgorman@...e.de>, Pekka Enberg <penberg@...nel.org>,
	Leonid Moiseichuk <leonid.moiseichuk@...ia.com>,
	KOSAKI Motohiro <kosaki.motohiro@...il.com>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	John Stultz <john.stultz@...aro.org>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, linaro-kernel@...ts.linaro.org,
	patches@...aro.org, kernel-team@...roid.com,
	linux-man@...r.kernel.org
Subject: Re: [RFC v2 0/2] vmevent: A bit reworked pressure attribute + docs +
 man page

On Thu, Oct 25, 2012 at 02:08:14AM -0700, Anton Vorontsov wrote:
[...]
> Maybe it makes sense to implement something like PRESSURE_MILD with an
> additional nr_pages threshold, which basically hits the kernel about how
> many easily reclaimable pages userland has (that would be a part of our
> definition for the mild pressure level). So, essentially it will be
> 
> 	if (pressure_index >= oom_level)
> 		return PRESSURE_OOM;
> 	else if (pressure_index >= med_level)
> 		return PRESSURE_MEDIUM;
> 	else if (userland_reclaimable_pages >= nr_reclaimable_pages)
> 		return PRESSURE_MILD;

...or we can call it PRESSURE_BALANCE, just to be precise and clear.
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