From: Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Mike Galbraith <efault@gmx.de>,
Prashanth Nageshappa <prashanth@linux.vnet.ibm.com>,
mingo@kernel.org, LKML <linux-kernel@vger.kernel.org>,
roland@kernel.org, Ingo Molnar <mingo@elte.hu>
Subject: Re: [PATCH] sched: balance_cpu to consider other cpus in its group as target of (pinned) task migration
Date: Mon, 4 Jun 2012 21:16:09 +0530 [thread overview]
Message-ID: <20120604154609.GF25126@linux.vnet.ibm.com> (raw)
In-Reply-To: <1338824014.28282.86.camel@twins>
* Peter Zijlstra <peterz@infradead.org> [2012-06-04 17:33:34]:
> Now I'm not as opposed to this as Mike is, the load cpu_power thing can
> also happen due to excessive IRQ time,
Yes good point.
> Thing is, you can create an arbitrary hard problem by creating lots of
> tasks with tricky masks, we shouldn't bend over backwards trying to
> solve it just because.
Agreed. The change proposed here however seems simple enough to warrant
consideration?
> [ Also, I suspect I wrecked the ALL_PINNED muck, shouldn't we reset
> env.loop_break? ]
Yeah I think so. That was one of the bug we had in first version of the
patch (where we had not reset loop_break and redo was failing to pull task
because of that).
- vatsa
next prev parent reply other threads:[~2012-06-04 15:46 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-04 5:57 [PATCH] sched: balance_cpu to consider other cpus in its group as target of (pinned) task migration Prashanth Nageshappa
2012-06-04 9:00 ` Peter Zijlstra
2012-06-04 11:41 ` Srivatsa Vaddagiri
2012-06-04 11:49 ` Peter Zijlstra
2012-06-04 12:27 ` Srivatsa Vaddagiri
2012-06-04 11:51 ` Peter Zijlstra
2012-06-04 9:25 ` Mike Galbraith
2012-06-04 11:53 ` Peter Zijlstra
2012-06-04 12:47 ` Mike Galbraith
2012-06-04 13:07 ` Srivatsa Vaddagiri
2012-06-04 14:30 ` Mike Galbraith
2012-06-04 14:38 ` Srivatsa Vaddagiri
2012-06-04 14:41 ` Mike Galbraith
2012-06-04 15:00 ` Srivatsa Vaddagiri
2012-06-04 15:21 ` Peter Zijlstra
2012-06-04 15:25 ` Srivatsa Vaddagiri
2012-06-04 15:33 ` Peter Zijlstra
2012-06-04 15:46 ` Srivatsa Vaddagiri [this message]
2012-06-04 16:56 ` Mike Galbraith
2012-06-04 17:37 ` Srivatsa Vaddagiri
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