From: Marcelo Tosatti <mtosatti@redhat.com>
To: Donald Parsons <dparsons@brightdsl.net>
Cc: kvm@vger.kernel.org
Subject: Re: kvm-85rc5 Segmentation fault for m >= 2046 GB
Date: Mon, 13 Apr 2009 01:42:39 -0300 [thread overview]
Message-ID: <20090413044239.GA14609@amt.cnet> (raw)
In-Reply-To: <1239574452.3950.37.camel@falcon>
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
>
> --
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next prev parent reply other threads:[~2009-04-13 4:42 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-12 22:14 kvm-85rc5 Segmentation fault for m >= 2046 GB Donald Parsons
2009-04-13 4:42 ` Marcelo Tosatti [this message]
2009-04-13 15:19 ` Donald Parsons
2009-04-14 2:48 ` Donald Parsons
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