From: Mikael Pettersson <mikpe@csd.uu.se>
To: Robert Love <rml@tech9.net>
Cc: alan@redhat.com, mingo@elte.hu, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] 2.4-ac task->cpu abstraction and optimization
Date: Thu, 12 Sep 2002 08:52:24 +0200 [thread overview]
Message-ID: <15744.14760.938667.636159@kim.it.uu.se> (raw)
In-Reply-To: <1031782906.982.33.camel@phantasy>
Robert Love writes:
> Alan,
>
> Implement "task_cpu()" and "set_task_cpu()" as wrappers for reading and
> writing task->cpu, respectively.
>
> Additionally, introduce a nice optimization: on UP, task_cpu() can
> hard-code to "0" and set_task_cpu() can be a no-op.
>
> Patch is against 2.4.20-pre5-ac4, please apply.
This is fairly similar to the "up-opt" patch I have been using for my
2.4 standard (not -ac) kernels since last winter, available as
<http://www.csd.uu.se/~mikpe/linux/patches/2.4/patch-up-opt-2.4.20-pre6>.
It's not a direct substitute for yours, since -ac changes kernel/sched.c
quite a bit, and it has some unnecessary patches to SMP code, but other
than that, I totally agree with the intention of your patch.
/Mikael
next prev parent reply other threads:[~2002-09-12 6:47 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-09-11 22:21 [PATCH] 2.4-ac task->cpu abstraction and optimization Robert Love
2002-09-12 6:52 ` Mikael Pettersson [this message]
2002-09-12 18:23 ` Robert Love
2002-09-12 18:37 ` Mikael Pettersson
2002-09-12 20:22 ` Alan Cox
[not found] <15744.57073.2852.707839@kim.it.uu.se.suse.lists.linux.kernel>
[not found] ` <200209122022.g8CKMJS15137@devserv.devel.redhat.com.suse.lists.linux.kernel>
2002-09-12 20:55 ` Andi Kleen
2002-09-12 21:58 ` Alan Cox
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