linux-kernel - Re: [patch 00/19] VM pageout scalability improvements

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]

Date:	Fri, 04 Jan 2008 12:06:12 -0500
From:	Lee Schermerhorn <Lee.Schermerhorn@...com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	Rik van Riel <riel@...hat.com>, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, Eric Whitney <eric.whitney@...com>,
	Nick Dokos <nicholas.dokos@...com>
Subject: Re: [patch 00/19] VM pageout scalability improvements

On Fri, 2008-01-04 at 17:34 +0100, Andi Kleen wrote:
> Lee Schermerhorn <Lee.Schermerhorn@...com> writes:
> 
> > We can easily [he says, glibly] reproduce the hang on the anon_vma lock
> 
> Is that a NUMA platform? On non x86? Perhaps you just need queued spinlocks?

We see this on both NUMA and non-NUMA. x86_64 and ia64.  The basic
criteria to reproduce is to be able to run thousands [or low 10s of
thousands] of tasks, continually increasing the number until the system
just goes into reclaim.  Instead of swapping, the system seems to
hang--unresponsive from the console, but with "soft lockup" messages
spitting out every few seconds...


Lee 


> 
> -Andi

--
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/