From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:42150) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZxFtU-0003A5-G7 for qemu-devel@nongnu.org; Fri, 13 Nov 2015 10:04:08 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZxFtO-0007Zo-QV for qemu-devel@nongnu.org; Fri, 13 Nov 2015 10:04:04 -0500 Received: from proxmox.maurer-it.com ([94.136.31.133]:37004) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZxFtO-0007Ze-Ja for qemu-devel@nongnu.org; Fri, 13 Nov 2015 10:03:58 -0500 References: <5645F9FD.2050807@proxmox.com> <5645FB32.1080108@redhat.com> From: Wolfgang Link Message-ID: <5645FBD7.5020101@proxmox.com> Date: Fri, 13 Nov 2015 16:03:51 +0100 MIME-Version: 1.0 In-Reply-To: <5645FB32.1080108@redhat.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] Problems with VM after kernel commit b18d5431acc7a2fd22767925f3a6f597aa4bd29e List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Paolo Bonzini , guangrong.xiao@linux.intel.com Cc: qemu-devel@nongnu.org Thanks you for the quick reply and the good news. Wolfgang On 11/13/2015 04:01 PM, Paolo Bonzini wrote: > > On 13/11/2015 15:55, Wolfgang Link wrote: >> Hi, >> >> We have problems with a HP ProLiant DL380 Gen9 and Vm's with large >> amount of memory, grater then 30GB. >> >> The problem is that the vm need about 10 sec to start to boot. >> and when it comes to syncing the cpu clock, it takes a long time to >> finish this task. >> What also occurs is the vcpus need at startup 100% cpu usage and take >> over 1 min. > This has been fixed already, and the fix is slowly propagating to the > stable kernels. > > The fixes are: > > - KVM: vmx: obey KVM_QUIRK_CD_NW_CLEARED (fixed already in 4.2) > > - KVM: x86: obey KVM_X86_QUIRK_CD_NW_CLEARED in kvm_set_cr0() (in 4.4, > will be backported) > > Paolo >