Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]


Groups > linux.kernel > #1284532

Re: [PATCH v2 00/13] MADV_FREE support

Path csiph.com!eternal-september.org!feeder.eternal-september.org!aioe.org!bofh.it!news.nic.it!robomod
From Pavel Machek <pavel@ucw.cz>
Newsgroups linux.kernel
Subject Re: [PATCH v2 00/13] MADV_FREE support
Date Sat, 05 Dec 2015 12:20:01 +0100
Message-ID <qCj2F-kX-3@gated-at.bofh.it> (permalink)
References <qqV3I-27u-7@gated-at.bofh.it>
X-Original-To Minchan Kim <minchan@kernel.org>
MIME-Version 1.0
Content-Type text/plain; charset=us-ascii
Content-Disposition inline
User-Agent Mutt/1.5.23 (2014-03-12)
Sender robomod@news.nic.it
List-ID <linux-kernel.vger.kernel.org>
X-Mailing-List linux-kernel@vger.kernel.org
Approved robomod@news.nic.it
Lines 23
Organization linux.* mail to news gateway
X-Original-Cc Andrew Morton <akpm@linux-foundation.org>, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Michael Kerrisk <mtk.manpages@gmail.com>, linux-api@vger.kernel.org, Hugh Dickins <hughd@google.com>, Johannes Weiner <hannes@cmpxchg.org>, Rik van Riel <riel@redhat.com>, Mel Gorman <mgorman@suse.de>, KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>, Jason Evans <je@fb.com>, Daniel Micay <danielmicay@gmail.com>, "Kirill A. Shutemov" <kirill@shutemov.name>, Shaohua Li <shli@kernel.org>, Michal Hocko <mhocko@suse.cz>, yalin.wang2010@gmail.com
X-Original-Date Sat, 5 Dec 2015 12:10:42 +0100
X-Original-Message-ID <20151205111042.GA11598@amd>
X-Original-References <1446600367-7976-1-git-send-email-minchan@kernel.org>
X-Original-Sender linux-kernel-owner@vger.kernel.org
Xref csiph.com linux.kernel:1284532

Show key headers only | View raw


On Wed 2015-11-04 10:25:54, Minchan Kim wrote:
> MADV_FREE is on linux-next so long time. The reason was two, I think.
> 
> 1. MADV_FREE code on reclaim path was really mess.

Could you explain what MADV_FREE does?

Comment in code says 'free the page only when there's memory
pressure'. So I mark my caches MADV_FREE, no memory pressure, I can
keep using it? And if there's memory pressure, what happens? I get
zeros? SIGSEGV?

Thanks,
								Pavel

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next — Next in thread | Find similar | Unroll thread


Thread

Re: [PATCH v2 00/13] MADV_FREE support Pavel Machek <pavel@ucw.cz> - 2015-12-05 12:20 +0100
  Re: [PATCH v2 00/13] MADV_FREE support Daniel Micay <danielmicay@gmail.com> - 2015-12-05 17:00 +0100

csiph-web