From: Ingo Molnar <mingo@elte.hu>
To: Manfred Spraul <manfred@colorfullife.com>,
"David S. Miller" <davem@davemloft.net>
Cc: paulmck@linux.vnet.ibm.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] kernel/cpu.c: create a CPU_STARTING cpu_chain notifier
Date: Mon, 8 Sep 2008 19:26:02 +0200 [thread overview]
Message-ID: <20080908172602.GF17881@elte.hu> (raw)
In-Reply-To: <200809081710.m88HAgXl015314@mail.q-ag.de>
* Manfred Spraul <manfred@colorfullife.com> wrote:
> Right now, there is no notifier that is called on a new cpu, before
> the new cpu begins processing interrupts/softirqs. Various kernel
> function would need that notification, e.g. kvm works around by
> calling smp_call_function_single(), rcu polls cpu_online_map.
>
> The patch adds a CPU_STARTING notification. It also adds a helper
> function that sends the message to all cpu_chain handlers.
>
> Tested on x86-64.
>
> All other archs are untested. Especially on sparc, I'm not sure if I
> got it right.
applied to tip/sched/cpu-hotplug - thanks Manfred, nice cleanup. (FYI, i
fixed up the 3 problems that checkpatch reported)
David, can you see any problems with the Sparc32 bits?
Ingo
next prev parent reply other threads:[~2008-09-08 17:26 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-07 14:57 [PATCH] kernel/cpu.c: create a CPU_STARTING cpu_chain notifier Manfred Spraul
2008-09-08 17:26 ` Ingo Molnar [this message]
2008-09-08 18:50 ` Paul E. McKenney
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