From: Nick Piggin <nickpiggin@yahoo.com.au>
To: Con Kolivas <kernel@kolivas.org>
Cc: linux-kernel@vger.kernel.org, "Chen,
Kenneth W" <kenneth.w.chen@intel.com>,
"'Chris Mason'" <mason@suse.com>, Ingo Molnar <mingo@elte.hu>
Subject: Re: [PATCH RFC] smt nice introduces significant lock contention
Date: Fri, 02 Jun 2006 14:18:48 +1000 [thread overview]
Message-ID: <447FBC28.8030401@yahoo.com.au> (raw)
In-Reply-To: <200606021355.23671.kernel@kolivas.org>
Con Kolivas wrote:
> On Friday 02 June 2006 12:28, Con Kolivas wrote:
>
>>Actually looking even further, we only introduced the extra lookup of the
>>next task when we started unlocking the runqueue in schedule(). Since we
>>can get by without locking this_rq in schedule with this approach we can
>>simplify dependent_sleeper even further by doing the dependent sleeper
>>check after we have discovered what next is in schedule and avoid looking
>>it up twice. I'll hack something up to do that soon.
>
>
> Something like this (sorry I couldn't help but keep hacking on it).
Looking pretty good. Nice to acknowledge Chris's idea for
trylocks in your changelog when you submit a final patch.
--
SUSE Labs, Novell Inc.
Send instant messages to your online friends http://au.messenger.yahoo.com
next prev parent reply other threads:[~2006-06-02 4:18 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-06-01 22:55 [PATCH RFC] smt nice introduces significant lock contention Chris Mason
2006-06-01 23:57 ` Chen, Kenneth W
2006-06-02 1:59 ` Con Kolivas
2006-06-02 2:28 ` Con Kolivas
2006-06-02 3:55 ` Con Kolivas
2006-06-02 4:18 ` Nick Piggin [this message]
2006-06-02 6:08 ` Con Kolivas
2006-06-02 7:53 ` Nick Piggin
2006-06-02 8:17 ` Con Kolivas
2006-06-02 8:28 ` Nick Piggin
2006-06-02 8:34 ` Chen, Kenneth W
2006-06-02 8:56 ` Nick Piggin
2006-06-02 9:17 ` Chen, Kenneth W
2006-06-02 9:25 ` Con Kolivas
2006-06-02 9:31 ` Chen, Kenneth W
2006-06-02 9:34 ` Con Kolivas
2006-06-02 9:53 ` Chen, Kenneth W
2006-06-02 10:12 ` Con Kolivas
2006-06-02 20:53 ` Chen, Kenneth W
2006-06-02 22:15 ` Con Kolivas
2006-06-02 22:19 ` Chen, Kenneth W
2006-06-02 22:31 ` Con Kolivas
2006-06-02 22:58 ` Chen, Kenneth W
2006-06-03 0:02 ` Con Kolivas
2006-06-03 0:08 ` Chen, Kenneth W
2006-06-03 0:27 ` Con Kolivas
2006-06-02 9:36 ` Chen, Kenneth W
2006-06-02 10:30 ` Con Kolivas
2006-06-02 13:16 ` Con Kolivas
2006-06-02 21:54 ` Chen, Kenneth W
2006-06-02 22:04 ` Con Kolivas
2006-06-02 22:14 ` Chen, Kenneth W
2006-06-02 10:19 ` Con Kolivas
2006-06-02 20:59 ` Chen, Kenneth W
2006-06-02 8:38 ` Chen, Kenneth W
2006-06-02 8:24 ` Chen, Kenneth W
2006-06-02 8:31 ` Chen, Kenneth W
2006-06-02 8:50 ` Chen, Kenneth W
2006-06-02 2:35 ` Chen, Kenneth W
2006-06-02 3:04 ` Con Kolivas
2006-06-02 3:23 ` Con Kolivas
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