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Message-ID: <53B2C2A9.7030900@redhat.com>
Date: Tue, 01 Jul 2014 10:16:09 -0400
From: Rik van Riel <riel@redhat.com>
MIME-Version: 1.0
Subject: Re: [PATCH v9] mm: support madvise(MADV_FREE)
References: <1404174975-22019-1-git-send-email-minchan@kernel.org>
In-Reply-To: <1404174975-22019-1-git-send-email-minchan@kernel.org>
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Sender: owner-linux-mm@kvack.org
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To: Minchan Kim <minchan@kernel.org>, Andrew Morton <akpm@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, Michael Kerrisk <mtk.manpages@gmail.com>, Linux API <linux-api@vger.kernel.org>, Hugh Dickins <hughd@google.com>, Johannes Weiner <hannes@cmpxchg.org>, KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>, Mel Gorman <mgorman@suse.de>, Jason Evans <je@fb.com>, Zhang Yanfei <zhangyanfei@cn.fujitsu.com>

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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@gmail.com> Cc: Linux API
> <linux-api@vger.kernel.org> Cc: Hugh Dickins <hughd@google.com> Cc:
> Johannes Weiner <hannes@cmpxchg.org> Cc: Rik van Riel
> <riel@redhat.com> Cc: KOSAKI Motohiro
> <kosaki.motohiro@jp.fujitsu.com> Cc: Mel Gorman <mgorman@suse.de> 
> Cc: Jason Evans <je@fb.com> Cc: Zhang Yanfei
> <zhangyanfei@cn.fujitsu.com> Signed-off-by: Minchan Kim
> <minchan@kernel.org>

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


- -- 
All rights reversed
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