From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marcelo Tosatti Subject: Re: kvm-85rc5 Segmentation fault for m >= 2046 GB Date: Mon, 13 Apr 2009 01:42:39 -0300 Message-ID: <20090413044239.GA14609@amt.cnet> References: <1239574452.3950.37.camel@falcon> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: kvm@vger.kernel.org To: Donald Parsons Return-path: Received: from mx2.redhat.com ([66.187.237.31]:41243 "EHLO mx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752341AbZDMEmy (ORCPT ); Mon, 13 Apr 2009 00:42:54 -0400 Content-Disposition: inline In-Reply-To: <1239574452.3950.37.camel@falcon> Sender: kvm-owner@vger.kernel.org List-ID: On Sun, Apr 12, 2009 at 06:14:12PM -0400, Donald Parsons wrote: > Required info: > Intel Core 2 Duo E6600 > kvm version kvm-85rc5 seg faults (rc[13] fine; rc[24]?) > Host kernel version: 2.6.29.1 SMP x86_64 (on Fedora 10) > Guest: Fedora 11 beta x86_64 (host and guest updated) > qemu cmd line: > /usr/local/kvm/bin/qemu-system-x86_64 fc11Beta.img -m 2048 & > Problem still present with either of -no-kvm-irqchip or > -no-kvm-pit switch > Problem also appears with the -no-kvm switch > > In trying to make the core file smaller I found the > seg fault disappeared for anything less than 2048 > and still appeared for other values above 2048. > (Interesting thing, m=2046 and 2047 got a little further, window > changed size before seg fault). Everything up to 2045 > worked. > Seg fault occurs quite early, last thing seen is: > "Press F12 for boot menu" > followed by segfault about 3.5 to 4 seconds later. > > Seems to be a problem with http://www.linux-kvm.org/page/Bugs > where it says about core files "Then get a backtrace of > the error with" followed by nothing? # gdb -c core.xxx qemu/x86_64-softmmu/qemu-system-x86_64 (gdb) bt Yes, the page is missing information, will be fixed. > > dmesg shows: > > (these for m>=2048) > qemu-system-x86[9392] general protection ip:43c8e9 sp:7fffdfd955d0 > error:0 in qemu-system-x86_64[400000+1f2000] > qemu-system-x86[9394] general protection ip:43c8e9 sp:7fffee13e970 > error:0 in qemu-system-x86_64[400000+1f2000] > qemu-system-x86[9462] general protection ip:43c8e9 sp:7fff21ce3510 > error:0 in qemu-system-x86_64[400000+1f2000] > qemu-system-x86[9522] general protection ip:43c8e9 sp:7fff7b4d4d10 > error:0 in qemu-system-x86_64[400000+1f2000] > qemu-system-x86[9525] general protection ip:43c8e9 sp:7fff11aba2f0 > error:0 in qemu-system-x86_64[400000+1f2000] > > (next one m=2046) > qemu-system-x86[9540] general protection ip:43c8f4 sp:7fffd6020850 > error:0 in qemu-system-x86_64[400000+1f2000] > (next one m=2047) > qemu-system-x86[9314] general protection ip:43c8f4 sp:7fffdcfe1810 > error:0 in qemu-system-x86_64[400000+1f2000] > > Don > > -- > To unsubscribe from this list: send the line "unsubscribe kvm" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html