From mboxrd@z Thu Jan 1 00:00:00 1970 From: Julien Grall Subject: [PATCH v3] xen: domain_update_node_affinity: Bail out early if no VCPUs are allocated Date: Fri, 8 Aug 2014 14:06:48 +0100 Message-ID: <1407503208-20218-1-git-send-email-julien.grall@linaro.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail6.bemta14.messagelabs.com ([193.109.254.103]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1XFjsn-0006zF-JT for xen-devel@lists.xenproject.org; Fri, 08 Aug 2014 13:06:57 +0000 Received: by mail-we0-f175.google.com with SMTP id t60so5653102wes.34 for ; Fri, 08 Aug 2014 06:06:55 -0700 (PDT) List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: xen-devel@lists.xenproject.org Cc: Juergen Gross , Keir Fraser , ian.campbell@citrix.com, Ian Jackson , Dario Faggioli , Julien Grall , tim@xen.org, George Dunlap , stefano.stabellini@citrix.com, Jan Beulich List-Id: xen-devel@lists.xenproject.org The commit "move domain to cpupool0 before destroying it" make Xen crashes when a domain is destroyed with d->vcpus allocated but no VCPU initialized. Assertion '!cpumask_empty(dom_cpumask)' failed at domain.c:452 Xen call trace: [<00207bd8>] domain_update_node_affinity+0x10c/0x238 (PC) [<00000004>] 00000004 (LR) [<00226870>] sched_move_domain+0x3cc/0x42c [<0020925c>] domain_kill+0xc8/0x178 [<00206a0c>] do_domctl+0xaac/0x15e4 [<002529c0>] do_trap_hypervisor+0xc5c/0xf94 [<002559f0>] return_from_trap+0/0x4 Bail out early if there is d->VCPU is not allocated or VCPU 0 has not been initialized. Signed-off-by: Julien Grall Cc: George Dunlap Cc: Dario Faggioli Cc: Juergen Gross Cc: Ian Campbell Cc: Ian Jackson Cc: Jan Beulich Cc: Keir Fraser Cc: Tim Deegan --- This patch should be backported to Xen 4.4 Changes in v4: - Drop the check in common/schedule.c before calling domain_update_node_affinity - Comment the check in domain_update_node_affinity Changes in v3: - Change commit message - Bail out early rather than modifying the ASSERT --- xen/common/domain.c | 4 ++++ xen/common/schedule.c | 4 +--- 2 files changed, 5 insertions(+), 3 deletions(-) diff --git a/xen/common/domain.c b/xen/common/domain.c index d7a84cf..ca6174a 100644 --- a/xen/common/domain.c +++ b/xen/common/domain.c @@ -415,6 +415,10 @@ void domain_update_node_affinity(struct domain *d) struct vcpu *v; unsigned int cpu; + /* Do we have vcpus already? If not, no need to update node-affinity */ + if ( !d->vcpu || !d->vcpu[0] ) + return; + if ( !zalloc_cpumask_var(&dom_cpumask) ) return; if ( !zalloc_cpumask_var(&dom_cpumask_soft) ) diff --git a/xen/common/schedule.c b/xen/common/schedule.c index 9a49769..55503e0 100644 --- a/xen/common/schedule.c +++ b/xen/common/schedule.c @@ -310,9 +310,7 @@ int sched_move_domain(struct domain *d, struct cpupool *c) SCHED_OP(old_ops, free_vdata, vcpudata); } - /* Do we have vcpus already? If not, no need to update node-affinity */ - if ( d->vcpu ) - domain_update_node_affinity(d); + domain_update_node_affinity(d); domain_unpause(d); -- 1.7.10.4