From mboxrd@z Thu Jan 1 00:00:00 1970 From: Julien Grall Subject: Re: [PATCH v9 12/12] xen/arm: gic_events_need_delivery and irq priorities Date: Wed, 18 Jun 2014 12:47:53 +0100 Message-ID: <53A17C69.80306@linaro.org> References: <1402409240-28114-12-git-send-email-stefano.stabellini@eu.citrix.com> <1403087805.14448.9.camel@kazak.uk.xensource.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1403087805.14448.9.camel@kazak.uk.xensource.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: Ian Campbell , Stefano Stabellini Cc: julien.grall@citrix.com, xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org On 06/18/2014 11:36 AM, Ian Campbell wrote: > AIUI there is no relationship here with "xen/arm: make accesses to > desc->status flags atomic" which fixes an issue which already present > before this series. The error was not really there before. We were "safe" because the flags were cleared before EOIing the IRQ. Here, we are clearing after EOIing (it has been made by the guest). So this race condition can happen more often. Regards, -- Julien Grall