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[Xen-devel] Re: [PATCH] sched: provide scheduler_ipi() callback in response to smp_send_reschedule()
- To: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
- From: Russell King - ARM Linux <linux@xxxxxxxxxxxxxxxx>
- Date: Mon, 17 Jan 2011 11:26:37 +0000
- Cc: linux-m32r-ja@xxxxxxxxxxxxxxxxx, linux-mips@xxxxxxxxxxxxxx, linux-ia64@xxxxxxxxxxxxxxx, linux-sh@xxxxxxxxxxxxxxx, Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>, Heiko Carstens <heiko.carstens@xxxxxxxxxx>, David Howells <dhowells@xxxxxxxxxx>, Paul Mackerras <paulus@xxxxxxxxx>, Helge Deller <deller@xxxxxx>, sparclinux@xxxxxxxxxxxxxxx, Linux-Arch <linux-arch@xxxxxxxxxxxxxxx>, linux-s390@xxxxxxxxxxxxxxx, Jesper Nilsson <jesper.nilsson@xxxxxxxx>, Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>, Hirokazu Takata <takata@xxxxxxxxxxxxxx>, x86@xxxxxxxxxx, "James E.J. Bottomley" <jejb@xxxxxxxxxxxxxxxx>, virtualization@xxxxxxxxxxxxxx, Ingo Molnar <mingo@xxxxxxxxxx>, Matt Turner <mattst88@xxxxxxxxx>, Fenghua Yu <fenghua.yu@xxxxxxxxx>, Mike Frysinger <vapier@xxxxxxxxxx>, user-mode-linux-devel@xxxxxxxxxxxxxxxxxxxxx, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>, Jeff Dike <jdike@xxxxxxxxxxx>, Chris Metcalf <cmetcalf@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx, Mikael Starvik <starvik@xxxxxxxx>, linux-m32r@xxxxxxxxxxxxxxxxx, Ivan Kokshaysky <ink@xxxxxxxxxxxxxxxxxxxx>, user-mode-linux-user@xxxxxxxxxxxxxxxxxxxxx, uclinux-dist-devel@xxxxxxxxxxxxxxxxxxxx, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx, Richard Henderson <rth@xxxxxxxxxxx>, Tony Luck <tony.luck@xxxxxxxxx>, linux-parisc@xxxxxxxxxxxxxxx, linux-cris-kernel@xxxxxxxx, linux-am33-list@xxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, Ralf Baechle <ralf@xxxxxxxxxxxxxx>, Kyle McMartin <kyle@xxxxxxxxxxx>, Paul Mundt <lethal@xxxxxxxxxxxx>, linux-alpha@xxxxxxxxxxxxxxx, Martin Schwidefsky <schwidefsky@xxxxxxxxxx>, linux390@xxxxxxxxxx, Koichi Yasutake <yasutake.koichi@xxxxxxxxxxxxxxxx>, linuxppc-dev@xxxxxxxxxxxxxxxx, "David S. Miller" <davem@xxxxxxxxxxxxx>
- Delivery-date: Tue, 18 Jan 2011 03:21:58 -0800
- List-id: Xen developer discussion <xen-devel.lists.xensource.com>
On Mon, Jan 17, 2011 at 12:07:13PM +0100, Peter Zijlstra wrote:
> diff --git a/arch/alpha/kernel/smp.c b/arch/alpha/kernel/smp.c
> index 42aa078..c4a570b 100644
> --- a/arch/alpha/kernel/smp.c
> +++ b/arch/alpha/kernel/smp.c
> @@ -587,6 +587,7 @@ handle_ipi(struct pt_regs *regs)
> case IPI_RESCHEDULE:
> /* Reschedule callback. Everything to be done
> is done by the interrupt return path. */
> + scheduler_ipi();
> break;
>
> case IPI_CALL_FUNC:
> diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
> index 9066473..ffde790 100644
> --- a/arch/arm/kernel/smp.c
> +++ b/arch/arm/kernel/smp.c
> @@ -579,6 +579,7 @@ asmlinkage void __exception do_IPI(struct pt_regs *regs)
> * nothing more to do - eveything is
> * done on the interrupt return path
> */
> + scheduler_ipi();
Maybe remove the comment "everything is done on the interrupt return path"
as with this function call, that is no longer the case.
Looks like the same is true for Alpha as well?
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