From mboxrd@z Thu Jan 1 00:00:00 1970 From: Vitaly Kuznetsov Subject: Re: Failure to boot HVM guest with more than 32 VCPUS Date: Thu, 13 Aug 2015 10:20:11 +0200 Message-ID: <874mk3fvlw.fsf@vitty.brq.redhat.com> References: <87mvxwq20c.fsf@vitty.brq.redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: (Xudong Hao's message of "Thu, 13 Aug 2015 00:48:23 +0000") List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: "Hao, Xudong" Cc: "xen-devel@lists.xen.org" List-Id: xen-devel@lists.xenproject.org "Hao, Xudong" writes: >> -----Original Message----- >> From: Vitaly Kuznetsov [mailto:vkuznets@redhat.com] >> Sent: Wednesday, August 12, 2015 5:40 PM >> To: Hao, Xudong >> Cc: xen-devel@lists.xen.org >> Subject: Re: [Xen-devel] Failure to boot HVM guest with more than 32 >> VCPUS >> >> "Hao, Xudong" writes: >> >> > Hi, >> > >> > In X86_64 platform, we noticed an issue that Xen boot a RHEL6u6 or >> > Fedora22 guest, when configure the VCPU more than 32, the guest will >> > fail to boot up. >> >> The issue is well-known for RHEL6.6 (and is fixed in 6.7 and in 6.6.z) >> but Fedora22 should boot. The log below is from RHEL6.6, can you please >> provide one from Fedora? >> > > Vitaly, > > Thanks for quick response. Is the fix in guest pv driver? The fix is in RHEL6 kernel, prior to it there is no support for vcpu_info outside of shared_info and so only 32 vcpus are supported. > Will catch Fedora22 log. Please do, this is probably a different issue. -- Vitaly