linux-kernel - Re: Linux 2.6.31 - very swap-happy with plenty of free RAM

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: <4B041143.2080407@redhat.com>
Date:	Wed, 18 Nov 2009 10:22:43 -0500
From:	Rik van Riel <riel@...hat.com>
To:	Dan Merillat <dan.merillat@...il.com>
CC:	linux-kernel@...r.kernel.org
Subject: Re: Linux 2.6.31 - very swap-happy with plenty of free RAM

On 11/18/2009 02:56 AM, Dan Merillat wrote:
> 1.7gb of disk cache, 750 meg of free RAM, and it swaps out 300meg in a
> matter of seconds when given access to a swapfile, then thrashes the
> disk like crazy because that RAM was actively in use.
>    

> Ideas on where to start looking?  If this is a vmware issue I'll take
> it to them.
>    
This smells like a higher order memory allocation
failed and either is doing a lot of direct reclaim or
kicked kswapd until it freed up lots of memory.

However, I do not believe we keep track of higher
order reclaims in /proc/vmstat or elsewhere I
looked :(
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/