From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: [ kernel 3.5 ] Kernel bug when using kvm Date: Mon, 16 Jul 2012 17:40:53 +0300 Message-ID: <500427F5.80709@redhat.com> References: <5003FA12.7010907@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Cc: kvm@vger.kernel.org To: nicolas prochazka Return-path: Received: from mx1.redhat.com ([209.132.183.28]:43019 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751292Ab2GPOk4 (ORCPT ); Mon, 16 Jul 2012 10:40:56 -0400 In-Reply-To: Sender: kvm-owner@vger.kernel.org List-ID: On 07/16/2012 05:37 PM, nicolas prochazka wrote: > No, It is not 100% reproductible, I'm trying to find the case, but : > Now when i start a qemu-kvm , > there is a kvm-pit/xxxx which takes a lot of cpu time ( ~ 20 %) , ( > not with kernel 3.3.8 ) > > for the complete stack trace, which kernel options should i set, > i've already kernel debug . Should be following the BUG message. Is what you posted everything you got? > > Regards, > Nicolas Prochazka. > > 2012/7/16 Avi Kivity : >> On 07/16/2012 02:06 PM, nicolas prochazka wrote: >>> Hello, >>> with linux kernel 3.5rc6 and 3.5rc7 >>> I do not test with other kernel 3.5. >>> On linux kernel 3.3.8 , threre is no problem. >>> >>> If I start qemu-kvm process, system is overload and >>> dmesg : >>> >>> BUG: unable to handle kernel paging request at 000000010000003b >>> IP: [] tid_fd_revalidate+0x84/0x1a0 >>> PGD 66989a067 PUD 0 >>> Oops: 0000 [#1] SMP >>> CPU 3 >>> Modules linked in: [last unloaded: kvm] >> >> Is this repeatable? >> >> Please post a complete stack trace. >> >> >> >> >> -- >> error compiling committee.c: too many arguments to function >> >> > -- error compiling committee.c: too many arguments to function