From: "Siddha, Suresh B" <suresh.b.siddha@intel.com>
To: Paul Jackson <pj@sgi.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>,
akpm@osdl.org, mbligh@google.com, menage@google.com,
Simon.Derr@bull.net, linux-kernel@vger.kernel.org,
dino@in.ibm.com, rohitseth@google.com, holt@sgi.com,
dipankar@in.ibm.com, suresh.b.siddha@intel.com, clameter@sgi.com
Subject: Re: [RFC] cpuset: add interface to isolated cpus
Date: Fri, 20 Oct 2006 13:59:44 -0700 [thread overview]
Message-ID: <20061020135944.B8481@unix-os.sc.intel.com> (raw)
In-Reply-To: <20061020130141.b5e986dd.pj@sgi.com>; from pj@sgi.com on Fri, Oct 20, 2006 at 01:01:41PM -0700
On Fri, Oct 20, 2006 at 01:01:41PM -0700, Paul Jackson wrote:
> Nick wrote:
> > Or, another question, how does my patch hijack cpus_allowed? In
> > what way does it change the semantics of cpus_allowed?
>
> It limits load balancing for tasks in cpusets containing
> a superset of that cpusets cpus.
>
> There are always such cpusets - the top cpuset if no other.
Its just a corner case issue that Nick didn't consider while doing a quick
patch. Nick meant to partition the sched domain at the top
exclusive cpuset and he probably missed the case where root cpuset is marked
as exclusive.
thanks,
suresh
next prev parent reply other threads:[~2006-10-20 21:20 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-19 9:26 [RFC] cpuset: add interface to isolated cpus Paul Jackson
2006-10-19 10:17 ` Nick Piggin
2006-10-19 17:55 ` Paul Jackson
2006-10-19 18:07 ` Nick Piggin
2006-10-19 18:56 ` Paul Jackson
2006-10-19 19:03 ` Nick Piggin
2006-10-20 3:37 ` Paul Jackson
2006-10-20 8:02 ` Nick Piggin
2006-10-20 14:52 ` Nick Piggin
2006-10-20 20:03 ` Paul Jackson
2006-10-20 19:59 ` Paul Jackson
2006-10-20 20:01 ` Paul Jackson
2006-10-20 20:59 ` Siddha, Suresh B [this message]
2006-10-21 1:33 ` Paul Jackson
2006-10-21 6:14 ` Nick Piggin
2006-10-21 7:24 ` Paul Jackson
2006-10-21 10:51 ` Nick Piggin
2006-10-22 4:54 ` Paul Jackson
2006-10-20 21:04 ` Dinakar Guniguntala
2006-10-23 3:18 ` Paul Jackson
2006-10-23 5:07 ` Nick Piggin
2006-10-23 5:51 ` Paul Jackson
2006-10-23 5:40 ` Siddha, Suresh B
2006-10-23 6:06 ` Paul Jackson
2006-10-23 6:07 ` Paul Jackson
2006-10-23 6:17 ` Nick Piggin
2006-10-23 6:41 ` Paul Jackson
2006-10-23 6:49 ` Nick Piggin
2006-10-23 6:48 ` Paul Jackson
2006-10-23 20:58 ` Paul Jackson
2006-10-23 19:50 ` Dinakar Guniguntala
2006-10-23 20:47 ` Paul Jackson
2006-10-24 15:44 ` Paul Jackson
2006-10-25 19:40 ` Paul Jackson
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