From: Andrew Cooper <andrew.cooper3@citrix.com>
To: Ross Lagerwall <ross.lagerwall@citrix.com>, xen-devel@lists.xen.org
Cc: Jan Beulich <jbeulich@suse.com>
Subject: Re: [PATCH v3] x86: Fixup IRQs when CPUs go down during shutdown
Date: Fri, 4 Dec 2015 14:39:00 +0000 [thread overview]
Message-ID: <5661A584.5070209@citrix.com> (raw)
In-Reply-To: <1449237700-10602-1-git-send-email-ross.lagerwall@citrix.com>
On 04/12/15 14:01, Ross Lagerwall wrote:
> Commit fc0c3fa2ad5c ("x86/IO-APIC: fix setup of Xen internally used IRQs
> (take 2)") introduced a regression on some hardware where Xen would hang
> during shutdown, repeating the following message:
> APIC error on CPU0: 08(08), Receive accept error
>
> This appears to be because an interrupt (in this case from the serial
> console) destined for a CPU other than the boot CPU is left unhandled so
> an APIC error on CPU 0 is generated instead.
>
> To fix this, before taking down the non-boot CPUs, call fixup_irqs()
> with a CPU mask of only the boot CPU to reset the IRQ affinities
> correctly.
>
> Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
next prev parent reply other threads:[~2015-12-04 14:39 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-04 14:01 [PATCH v3] x86: Fixup IRQs when CPUs go down during shutdown Ross Lagerwall
2015-12-04 14:39 ` Andrew Cooper [this message]
2015-12-04 14:42 ` Jan Beulich
2015-12-10 9:21 ` Ross Lagerwall
2015-12-10 9:28 ` Jan Beulich
2015-12-10 9:38 ` Ross Lagerwall
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