linux-kernel - Re: [PATCH v9] mm: support madvise(MADV

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Date:	Tue, 01 Jul 2014 10:16:09 -0400
From:	Rik van Riel <riel@...hat.com>
To:	Minchan Kim <minchan@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
CC:	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	Michael Kerrisk <mtk.manpages@...il.com>,
	Linux API <linux-api@...r.kernel.org>,
	Hugh Dickins <hughd@...gle.com>,
	Johannes Weiner <hannes@...xchg.org>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Mel Gorman <mgorman@...e.de>, Jason Evans <je@...com>,
	Zhang Yanfei <zhangyanfei@...fujitsu.com>
Subject: Re: [PATCH v9] mm: support madvise(MADV_FREE)

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On 06/30/2014 08:36 PM, Minchan Kim wrote:
> Linux doesn't have an ability to free pages lazy while other OS 
> already have been supported that named by madvise(MADV_FREE).
> 
> The gain is clear that kernel can discard freed pages rather than 
> swapping out or OOM if memory pressure happens.
> 
> Without memory pressure, freed pages would be reused by userspace 
> without another additional overhead(ex, page fault + allocation +
> zeroing).

> Cc: Michael Kerrisk <mtk.manpages@...il.com> Cc: Linux API
> <linux-api@...r.kernel.org> Cc: Hugh Dickins <hughd@...gle.com> Cc:
> Johannes Weiner <hannes@...xchg.org> Cc: Rik van Riel
> <riel@...hat.com> Cc: KOSAKI Motohiro
> <kosaki.motohiro@...fujitsu.com> Cc: Mel Gorman <mgorman@...e.de> 
> Cc: Jason Evans <je@...com> Cc: Zhang Yanfei
> <zhangyanfei@...fujitsu.com> Signed-off-by: Minchan Kim
> <minchan@...nel.org>

Acked-by: Rik van Riel <riel@...hat.com>


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