Re: [Qemu-devel] qemu seabios issue with vhost-scsi

[Gleb Natapov <gleb@redhat.com>]

On Thu, May 23, 2013 at 08:53:55AM +0800, Asias He wrote:
> On Wed, May 22, 2013 at 05:36:08PM -0700, Badari wrote:
> > Hi,
> > 
> > While testing vhost-scsi in the current qemu git, ran into an earlier issue
> > with seabios. I had to disable scsi support in seabios to get it working.
> > 
> > I was hoping this issue got resolved when vhost-scsi support got
> > merged into qemu. Is this still being worked on ?
> 
> Hmm, can you try seabios.git? Not sure if seabios shipped by qemu picked
> up the fixes for vhost-scsi.
> 
Nothing in seabios should crash qemu.

> > Thanks,
> > Badari
> > 
> > [root ~]# gdb /root/qemu/x86_64-softmmu/qemu-system-x86_64
> > GNU gdb (GDB) Red Hat Enterprise Linux (7.2-60.el6)
> > Copyright (C) 2010 Free Software Foundation, Inc.
> > License GPLv3+: GNU GPL version 3 or later
> > <http://gnu.org/licenses/gpl.html>
> > This is free software: you are free to change and redistribute it.
> > There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
> > and "show warranty" for details.
> > This GDB was configured as "x86_64-redhat-linux-gnu".
> > For bug reporting instructions, please see:
> > <http://www.gnu.org/software/gdb/bugs/>...
> > Reading symbols from /root/qemu/x86_64-softmmu/qemu-system-x86_64...done.
> > (gdb) run  --cpu qemu64 --enable-kvm  -m 4096 -drive
> > file=/var/lib/libvirt/images/lnx.img,if=ide,cache=writethrough
> > -device vhost-scsi-pci,wwpn=naa.6001405bd4e8476d,event_idx=off -vnc
> > :10 -boot d
> > Starting program: /root/qemu/x86_64-softmmu/qemu-system-x86_64 --cpu
> > qemu64 --enable-kvm  -m 4096 -drive
> > file=/var/lib/libvirt/images/window.img,if=ide,cache=writethrough
> > -device vhost-scsi-pci,wwpn=naa.6001405bd4e8476d,event_idx=off -vnc
> > :10 -boot d
> > warning: no loadable sections found in added symbol-file
> > system-supplied DSO at 0x7ffff7ffa000
> > [Thread debugging using libthread_db enabled]
> > [New Thread 0x7ffff1c1c700 (LWP 4725)]
> > [New Thread 0x7ffff1239700 (LWP 4726)]
> > [New Thread 0x7fffeb7ff700 (LWP 4729)]
> > 
> > Program received signal SIGSEGV, Segmentation fault.
> > [Switching to Thread 0x7ffff1239700 (LWP 4726)]
> > 0x00005555556b3191 in scsi_device_find (bus=0x5555565abb50, channel=0, id=0,
> >     lun=0) at hw/scsi/scsi-bus.c:1744
> > 1744        QTAILQ_FOREACH_REVERSE(kid, &bus->qbus.children,
> > ChildrenHead, sibling) {
> > Missing separate debuginfos, use: debuginfo-install
> > cyrus-sasl-gssapi-2.1.23-13.el6_3.1.x86_64
> > cyrus-sasl-lib-2.1.23-13.el6_3.1.x86_64
> > cyrus-sasl-md5-2.1.23-13.el6_3.1.x86_64
> > cyrus-sasl-plain-2.1.23-13.el6_3.1.x86_64 db4-4.7.25-17.el6.x86_64
> > glib2-2.22.5-7.el6.x86_64 glibc-2.12-1.107.el6.x86_64
> > gnutls-2.8.5-10.el6.x86_64 keyutils-libs-1.4-4.el6.x86_64
> > krb5-libs-1.10.3-10.el6.x86_64 libcom_err-1.41.12-14.el6.x86_64
> > libcurl-7.19.7-35.el6.x86_64 libgcrypt-1.4.5-9.el6_2.2.x86_64
> > libgpg-error-1.7-4.el6.x86_64 libidn-1.18-2.el6.x86_64
> > libpng-1.2.49-1.el6_2.x86_64 libselinux-2.0.94-5.3.el6.x86_64
> > libssh2-1.4.2-1.el6.x86_64 libtasn1-2.3-3.el6_2.1.x86_64
> > ncurses-libs-5.7-3.20090208.el6.x86_64 nspr-4.9.2-1.el6.x86_64
> > nss-3.14.0.0-12.el6.x86_64 nss-softokn-freebl-3.12.9-11.el6.x86_64
> > nss-util-3.14.0.0-2.el6.x86_64 openldap-2.4.23-31.el6.x86_64
> > openssl-1.0.0-27.el6.x86_64 pixman-0.26.2-4.el6.x86_64
> > zlib-1.2.3-29.el6.x86_64
> > (gdb) bt
> > #0  0x00005555556b3191 in scsi_device_find (bus=0x5555565abb50,
> > channel=0, id=
> >     0, lun=0) at hw/scsi/scsi-bus.c:1744
> > #1  0x00005555557a59f0 in virtio_scsi_device_find (vdev=0x5555565aba38, vq=
> >     0x5555565d1150) at /root/qemu/hw/scsi/virtio-scsi.c:56
> > #2  virtio_scsi_handle_cmd (vdev=0x5555565aba38, vq=0x5555565d1150)
> >     at /root/qemu/hw/scsi/virtio-scsi.c:376
> > #3  0x00005555557b3410 in access_with_adjusted_size (addr=16, value=
> >     0x7ffff1238b78, size=2, access_size_min=<value optimized out>,
> >     access_size_max=<value optimized out>, access=
> >     0x5555557b4b80 <memory_region_write_accessor>, opaque=0x5555565ab8f0)
> >     at /root/qemu/memory.c:364
> > #4  0x00005555557b3a3b in memory_region_iorange_write (
> >     iorange=<value optimized out>, offset=<value optimized out>,
> >     width=<value optimized out>, data=2) at /root/qemu/memory.c:439
> > #5  0x00005555557b29a6 in kvm_handle_io (env=0x555556520aa0)
> >     at /root/qemu/kvm-all.c:1485
> > #6  kvm_cpu_exec (env=0x555556520aa0) at /root/qemu/kvm-all.c:1634
> > #7  0x000055555576108e in qemu_kvm_cpu_thread_fn (arg=0x555556520aa0)
> >     at /root/qemu/cpus.c:759
> > #8  0x00007ffff6059851 in start_thread () from /lib64/libpthread.so.0
> > #9  0x00007ffff5da790d in clone () from /lib64/libc.so.6
> > 
> > 
> 
> -- 
> Asias

--
			Gleb.