linux-kernel - Re: [PATCH] cpuset: Rework sched domains and CPU hotplug handling (2.6.27-rc1)

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Message-Id: <20080804225636.541527e8.pj@sgi.com>
Date:	Mon, 4 Aug 2008 22:56:36 -0500
From:	Paul Jackson <pj@....com>
To:	Max Krasnyansky <maxk@...lcomm.com>
Cc:	mingo@...e.hu, linux-kernel@...r.kernel.org, menage@...gle.com,
	a.p.zijlstra@...llo.nl, vegard.nossum@...il.com,
	lizf@...fujitsu.com
Subject: Re: [PATCH] cpuset: Rework sched domains and CPU hotplug handling
 (2.6.27-rc1)

Max wrote:
> Actually it is appropriate, and there is one more user of the
> arch_reinit_sched_domains() which is S390 topology updates.
> Those things (mc_power and topology updates) have to update domain flags based
> on the mc/smt power and current topology settings.

Hmmm ... ok I suppose.

Could we have the kernel/sched.c code, in this case, call the
kernel/cpuset.c routine async_rebuild_sched_domains(), rather
than the synchronous rebuild_sched_domains() call (in your naming)
which required details of the get_online_cpus() and put_online_cpus()
wrapping to leak into kernel/sched.c:arch_reinit_sched_domains()
routine?

-- 
                  I won't rest till it's the best ...
                  Programmer, Linux Scalability
                  Paul Jackson <pj@....com> 1.940.382.4214
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