From: Peter Zijlstra <peterz@infradead.org>
To: Xunlei Pang <xlpang@126.com>
Cc: linux-kernel@vger.kernel.org, Ingo Molnar <mingo@redhat.com>,
Xunlei Pang <pang.xunlei@linaro.org>
Subject: Re: [PATCH] sched: Avoid sched domain rebuilding when hotplugging an isolate cpu
Date: Thu, 30 Jul 2015 12:30:37 +0200 [thread overview]
Message-ID: <20150730103037.GU19282@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <1437120225-16466-1-git-send-email-xlpang@126.com>
On Fri, Jul 17, 2015 at 04:03:45PM +0800, Xunlei Pang wrote:
> From: Xunlei Pang <pang.xunlei@linaro.org>
>
> The sched domain is always rebuilt when hotplugging an isolate cpu,
> as we can see in partition_sched_domains() with the NULL doms_new,
> current sched domain is destroyed, then rebuilt. Worse still, the
> rebuilding will reset all the parameters of the sched_domain. This
> makes no sense and contradicts the isloate concept.
What parameters? isolcpus should have fairly trivial domains to begin
with.
next prev parent reply other threads:[~2015-07-30 10:30 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-17 8:03 Xunlei Pang
2015-07-30 10:30 ` Peter Zijlstra [this message]
2015-07-30 10:54 ` pang.xunlei
2015-07-30 11:51 ` Peter Zijlstra
2015-07-30 12:05 ` pang.xunlei
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