* [PATCH] powerpc: stop_this_cpu: remove the cpu from the online map.
@ 2009-11-25 21:48 Valentine Barshak
2009-12-07 21:58 ` Valentine
0 siblings, 1 reply; 2+ messages in thread
From: Valentine Barshak @ 2009-11-25 21:48 UTC (permalink / raw)
To: linuxppc-dev
Remove the CPU from the online map to prevent smp_call_function
from sending messages to a stopped CPU.
Signed-off-by: Valentine Barshak <vbarshak@ru•mvista.com>
---
arch/powerpc/kernel/smp.c | 3 +++
1 file changed, 3 insertions(+)
diff -pruN linux-2.6.orig/arch/powerpc/kernel/smp.c linux-2.6/arch/powerpc/kernel/smp.c
--- linux-2.6.orig/arch/powerpc/kernel/smp.c 2009-11-26 00:22:15.000000000 +0300
+++ linux-2.6/arch/powerpc/kernel/smp.c 2009-11-26 00:26:48.000000000 +0300
@@ -218,6 +218,9 @@ void crash_send_ipi(void (*crash_ipi_cal
static void stop_this_cpu(void *dummy)
{
+ /* Remove this CPU */
+ set_cpu_online(smp_processor_id(), false);
+
local_irq_disable();
while (1)
;
^ permalink raw reply [flat|nested] 2+ messages in thread* Re: [PATCH] powerpc: stop_this_cpu: remove the cpu from the online map.
2009-11-25 21:48 [PATCH] powerpc: stop_this_cpu: remove the cpu from the online map Valentine Barshak
@ 2009-12-07 21:58 ` Valentine
0 siblings, 0 replies; 2+ messages in thread
From: Valentine @ 2009-12-07 21:58 UTC (permalink / raw)
To: linuxppc-dev
Ben, is this OK?
Other architectures do the same thing.
Thanks,
Val.
Valentine Barshak wrote:
> Remove the CPU from the online map to prevent smp_call_function
> from sending messages to a stopped CPU.
>
> Signed-off-by: Valentine Barshak <vbarshak@ru•mvista.com>
> ---
> arch/powerpc/kernel/smp.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff -pruN linux-2.6.orig/arch/powerpc/kernel/smp.c linux-2.6/arch/powerpc/kernel/smp.c
> --- linux-2.6.orig/arch/powerpc/kernel/smp.c 2009-11-26 00:22:15.000000000 +0300
> +++ linux-2.6/arch/powerpc/kernel/smp.c 2009-11-26 00:26:48.000000000 +0300
> @@ -218,6 +218,9 @@ void crash_send_ipi(void (*crash_ipi_cal
>
> static void stop_this_cpu(void *dummy)
> {
> + /* Remove this CPU */
> + set_cpu_online(smp_processor_id(), false);
> +
> local_irq_disable();
> while (1)
> ;
> _______________________________________________
> Linuxppc-dev mailing list
> Linuxppc-dev@lists•ozlabs.org
> https://lists.ozlabs.org/listinfo/linuxppc-dev
^ permalink raw reply [flat|nested] 2+ messages in thread
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2009-11-25 21:48 [PATCH] powerpc: stop_this_cpu: remove the cpu from the online map Valentine Barshak
2009-12-07 21:58 ` Valentine
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