From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: KVM Test result, KVM62-RC2 Date: Tue, 26 Feb 2008 11:53:58 +0200 Message-ID: <47C3E1B6.5000300@qumranet.com> References: <10EA09EFD8728347A513008B6B0DA77A02D3B6A3@pdsmsx411.ccr.corp.intel.com> <200802261744.26259.sheng.yang@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: kvm-devel@lists.sourceforge.net To: "Yang, Sheng" Return-path: In-Reply-To: <200802261744.26259.sheng.yang@intel.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: kvm-devel-bounces@lists.sourceforge.net Errors-To: kvm-devel-bounces@lists.sourceforge.net List-Id: kvm.vger.kernel.org Yang, Sheng wrote: >> One new issue: >> 1. qcow based smp linux guests likely hang >> https://sourceforge.net/tracker/index.php?func=detail&aid=1901980&group_ >> id=180599&atid=893831 >> We found the issue while booting qcow based rhel5.1 smp guest. It likely >> hangs at the first booting. If using raw disk image, the problem will >> not happen. >> >> > > This issue(i8254 don't connected to ioapic) happened from time to time on when > I debug IOAPIC and PIT related things. I think it caused by guest kernel > can't receive PIT interrupt in time. And I have done a experiment with in > kernel PIT patch, and it works well to fix this issue. > > I guess this may due to qcow need some more time, and the accumulate time > causing PIT interrupt delayed? > I think time calibration happens before any disk access by the kernel. -- error compiling committee.c: too many arguments to function ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/