linux-kernel - RE: [RFC PATCH 0/4]: affinity-on-next-touch

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, 12 Jun 2009 13:46:37 +0200
From:	Stefan Lankes <lankes@...s.rwth-aachen.de>
To:	'Andi Kleen' <andi@...stfloor.org>
Cc:	linux-kernel@...r.kernel.org, Lee.Schermerhorn@...com,
	linux-numa@...r.kernel.org,
	Boris Bierbaum <boris@...s.rwth-aachen.de>,
	'Brice Goglin' <Brice.Goglin@...ia.fr>
Subject: RE: [RFC PATCH 0/4]: affinity-on-next-touch


> > I analyze Lee Schermerhorn's migrate memory on cpu migration patches
> > (http://free.linux.hp.com/~lts/Patches/PageMigration/). I think that
> Lee
> > Schermerhorn add similar functionalities to the kernel. He called the
> > "affinity-on-next-touch" functionality "migrate_on_fault" and uses in
> his
> > patches the normal NUMA memory policies. Therefore, his solution fits
> better
> > to the Linux kernel. I tested his patches with our test applications
> and got
> > nearly the same performance results.
> 
> That's great to know.
> 
> I didn't think he had a per process setting though, did he?

He enables the support of migration-on-fault via cpusets (echo 1 >
/dev/cpuset/migrate_on_fault).
Afterwards, every process could initiate migration-on-fault via mbind(...,
MPOL_MF_MOVE|MPOL_MF_LAZY).

> > I found only patches for the kernel 2.6.25-rc2-mm1. Does someone
> develop
> > these patches further?
> 
> Not to much knowledge. Maybe Lee will pick them up again now that there
> are more use cases.
> 
> If he doesn't have time maybe you could update them?
 
We are planning to work in this area. I think that I could update these
patches. 
At least, I am able to support Lee.

Stefan

--
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/