From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ross Lagerwall Subject: Re: [PATCH v3] x86: Fixup IRQs when CPUs go down during shutdown Date: Thu, 10 Dec 2015 09:21:27 +0000 Message-ID: <56694417.5050307@citrix.com> References: <1449237700-10602-1-git-send-email-ross.lagerwall@citrix.com> <5661B44A02000078000BC247@prv-mh.provo.novell.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <5661B44A02000078000BC247@prv-mh.provo.novell.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Jan Beulich Cc: Andrew Cooper , xen-devel@lists.xen.org List-Id: xen-devel@lists.xenproject.org On 12/04/2015 02:42 PM, Jan Beulich wrote: >>>> On 04.12.15 at 15:01, 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 > > Reviewed-by: Jan Beulich > Is this going to go onto staging? Thanks, -- Ross Lagerwall