linux-kernel - Re: [RFC] cpuset: remove sched domain hooks from cpusets

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: <Pine.LNX.4.64.0610230901470.27654@schroedinger.engr.sgi.com>
Date:	Mon, 23 Oct 2006 09:03:30 -0700 (PDT)
From:	Christoph Lameter <clameter@....com>
To:	Nick Piggin <nickpiggin@...oo.com.au>
cc:	Paul Jackson <pj@....com>,
	"Siddha, Suresh B" <suresh.b.siddha@...el.com>, mbligh@...gle.com,
	akpm@...l.org, menage@...gle.com, Simon.Derr@...l.net,
	linux-kernel@...r.kernel.org, dino@...ibm.com,
	rohitseth@...gle.com, holt@....com, dipankar@...ibm.com
Subject: Re: [RFC] cpuset: remove sched domain hooks from cpusets

On Mon, 23 Oct 2006, Nick Piggin wrote:

> It is somewhat improved. The load balancing will now retry other CPUs,
> but this is pretty costly in terms of latency and rq lock hold time.
> And the algorithm itself still breaks down if you have lots of pinned
> tasks, even if the load balancer is willing to try lesser loaded cpus.

We would need to have a way of traversing the processors by load in order 
to avoid it. John Hawkes solves that issue earlier in 2.4.X by managing a 
list of processors according to their load.


-
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/