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  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]
Date:   Mon, 13 Feb 2017 16:42:42 +0100
From:   peter enderborg <peter.enderborg@...ymobile.com>
To:     Michal Hocko <mhocko@...nel.org>
CC:     <devel@...verdev.osuosl.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        <linux-kernel@...r.kernel.org>,
        Arve Hjønnevåg <arve@...roid.com>,
        Riley Andrews <riandrews@...roid.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        <linux-mm@...ck.org>
Subject: Re: [PATCH 0/3 staging-next] android: Lowmemmorykiller task tree

On 02/10/2017 11:27 AM, Michal Hocko wrote:
> [I have only now see this cover - it answers some of the questions I've
>  had to specific patches. It would be really great if you could use git
>  send-email to post patch series - it just does the right thing(tm)]
>
> On Thu 09-02-17 14:21:40, peter enderborg wrote:
>> Lowmemorykiller efficiency problem and a solution.
>>
>> Lowmemorykiller in android has a severe efficiency problem. The basic
>> problem is that the registered shrinker gets called very often without
>>  anything actually happening.
> Which is an inherent problem because lkml doesn't belong to shrinkers
> infrastructure.

Not really what this patch address.  I see it as a problem with shrinker
that there no slow-path-free (scan/count) where it should belong.
This patch address a specific problem where lot of cpu are wasted
in low memory conditions.

Powered by blists - more mailing lists