linux-kernel - Re: [PATCH 4/4] MADV_VOLATILE: Add page purging logic & SIGBUS trap

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Message-ID: <536BB354.2070402@linaro.org>
Date:	Thu, 08 May 2014 09:39:48 -0700
From:	John Stultz <john.stultz@...aro.org>
To:	Minchan Kim <minchan@...nel.org>
CC:	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Android Kernel Team <kernel-team@...roid.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Robert Love <rlove@...gle.com>, Mel Gorman <mel@....ul.ie>,
	Hugh Dickins <hughd@...gle.com>, Dave Hansen <dave@...1.net>,
	Rik van Riel <riel@...hat.com>,
	Dmitry Adamushko <dmitry.adamushko@...il.com>,
	Neil Brown <neilb@...e.de>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Mike Hommey <mh@...ndium.org>, Taras Glek <tglek@...illa.com>,
	Jan Kara <jack@...e.cz>,
	KOSAKI Motohiro <kosaki.motohiro@...il.com>,
	Michel Lespinasse <walken@...gle.com>,
	Keith Packard <keithp@...thp.com>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>
Subject: Re: [PATCH 4/4] MADV_VOLATILE: Add page purging logic & SIGBUS trap

On 05/07/2014 10:16 PM, Minchan Kim wrote:
> On Tue, Apr 29, 2014 at 02:21:23PM -0700, John Stultz wrote:
>> +	update_hiwater_rss(mm);
>> +	if (PageAnon(page))
>> +		dec_mm_counter(mm, MM_ANONPAGES);
>> +	else
>> +		dec_mm_counter(mm, MM_FILEPAGES);
> We can add file-backed page part later when we move to suppport vrange-file.

Fair enough. That bit is easy to drop for now.

thanks
-john
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