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xen-devel
Re: [Xen-devel] RE: [PATCH] irq: Exclude percpu IRQs from being fixed up
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To: |
"Li, Xin" <xin.li@xxxxxxxxx> |
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Subject: |
Re: [Xen-devel] RE: [PATCH] irq: Exclude percpu IRQs from being fixed up |
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From: |
Ian Campbell <Ian.Campbell@xxxxxxxxxx> |
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Date: |
Tue, 3 May 2011 12:55:36 +0100 |
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Cc: |
Jeremy Fitzhardinge <jeremy@xxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, "Dong, Eddie" <eddie.dong@xxxxxxxxx>, "'Zhang, Fengzhe'" <IMCEAEX-_O=INTEL_OU=EXCHANGE+20ADMINISTRATIVE+20GROUP+20+28FYDIBOHF23SPDLT+29_CN=RECIPIENTS_CN=FZHAN17@xxxxxxxxx>, Jan Beulich <JBeulich@xxxxxxxxxx> |
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Delivery-date: |
Tue, 03 May 2011 04:59:49 -0700 |
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<FC2FB65B4D919844ADE4BE3C2BB739AD5A2035D1@xxxxxxxxxxxxxxxxxxxxxxxxxxxx> |
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Organization: |
Citrix Systems, Inc. |
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References: |
<1A42CE6F5F474C41B63392A5F80372B2335E978D@xxxxxxxxxxxxxxxxxxxxxxxxxxxx> <4D5BF2FE02000078000322EB@xxxxxxxxxxxxxxxxxx> <4D5C68AF.3030807@xxxxxxxxx> <4D5CE1DE0200007800032557@xxxxxxxxxxxxxxxxxx> <4D5CDB77.2010607@xxxxxxxxx> <FC2FB65B4D919844ADE4BE3C2BB739AD5A2035D1@xxxxxxxxxxxxxxxxxxxxxxxxxxxx> |
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xen-devel-bounces@xxxxxxxxxxxxxxxxxxx |
On Thu, 2011-04-28 at 12:05 +0100, Li, Xin wrote:
> > >>>
> > >> IRQ_PER_CPU switch is not found in current Kconfig. I'm not sure if this
> > >
> > > kernel/irq/Kconfig (introduced as a generic option in 2.6.38-rc2). In
> > > prior kernel you'd have to add a respective Kconfig item in
> > > drivers/xen/Kconfig.
> > >
> > >> feature is going to be brought back in the short term. I remove the
> > >> ifdef to set IRQ_PER_CPU flag in desc by default but still leave the IRQ
> > >> handling logic unchanged. This is a temporary solution to fix system
> > >> crash on poweroff. And this is the fix with minimum impact among the
> > >> several solutions we tried.
> > >
> > > But it's more a hack than a fix. And making per-CPU IRQs properly
> >
> > Yes, that's true. Switching on IRQ_PER_CPU can make this patch neat. But
> > that isn't my call.
>
> Jeremy, would you consider the change to fix this issue?
There was no response to the several issues/questions I raised in
<1297933765.16356.1344.camel@xxxxxxxxxxxxxxxxxxxxxx>.
Ian.
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