linux-kernel - Re: [PATCH 1/5] mm: vmscan: scan dirty pages even in laptop mode

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20170126012713.GA21211@bbox>
Date:   Thu, 26 Jan 2017 10:27:13 +0900
From:   Minchan Kim <minchan@...nel.org>
To:     Johannes Weiner <hannes@...xchg.org>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Mel Gorman <mgorman@...e.de>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, kernel-team@...com
Subject: Re: [PATCH 1/5] mm: vmscan: scan dirty pages even in laptop mode

On Mon, Jan 23, 2017 at 01:16:37PM -0500, Johannes Weiner wrote:
> We have an elaborate dirty/writeback throttling mechanism inside the
> reclaim scanner, but for that to work the pages have to go through
> shrink_page_list() and get counted for what they are. Otherwise, we
> mess up the LRU order and don't match reclaim speed to writeback.
> 
> Especially during deactivation, there is never a reason to skip dirty
> pages; nothing is even trying to write them out from there. Don't mess
> up the LRU order for nothing, shuffle these pages along.
> 
> Signed-off-by: Johannes Weiner <hannes@...xchg.org>
Acked-by: Minchan Kim <minchan@...nel.org>