From: Rusty Russell <rusty@rustcorp.com.au>
To: Dominik Brodowski <linux@dominikbrodowski.de>
Cc: Zwane Mwaikambo <zwane@linuxpower.ca>,
lkml - Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] [CPU-HOTPLUG] convert cpucontrol to be a rwsem
Date: Thu, 04 Nov 2004 12:57:17 +1100 [thread overview]
Message-ID: <1099533437.7143.5.camel@localhost.localdomain> (raw)
In-Reply-To: <20041102222819.GA16414@dominikbrodowski.de>
On Tue, 2004-11-02 at 23:28 +0100, Dominik Brodowski wrote:
> Except that we don't want to (and can't[*]) disable preemption in the
> cpufreq case. Therefore, we __need__ to disable CPU hotplug specifically,
> and not meddle with other issues like preemption, scheduling, CPUs which are
> in the allowed_map, and so on. So back to the original patch: Rusty, do you
> agree with it?
Sure. I consider it a trivial change. The reason it wasn't a rwsem in
the first place is that there weren't many places which needed to grab
it, and none were time-sensitive.
Thanks!
Rusty.
--
A bad analogy is like a leaky screwdriver -- Richard Braakman
prev parent reply other threads:[~2004-11-04 4:55 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-11-01 8:43 [PATCH] [CPU-HOTPLUG] convert cpucontrol to be a rwsem Dominik Brodowski
2004-11-01 9:05 ` Nick Piggin
2004-11-01 14:00 ` Zwane Mwaikambo
2004-11-01 18:04 ` Lee Revell
2004-11-01 23:48 ` Rusty Russell
2004-11-02 14:54 ` Lee Revell
2004-11-02 0:16 ` Zwane Mwaikambo
2004-11-02 22:28 ` Dominik Brodowski
2004-11-04 1:57 ` Rusty Russell [this message]
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