From mboxrd@z Thu Jan  1 00:00:00 1970
From: Avi Kivity <avi@redhat.com>
Subject: Re: [Qemu-devel] 9p broken?
Date: Tue, 31 Jul 2012 15:16:57 +0300
Message-ID: <5017CCB9.3020300@redhat.com>
References: <50167F9B.5050003@redhat.com> <87a9ygs9rl.fsf@skywalker.in.ibm.com>
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Cc: qemu-devel <qemu-devel@nongnu.org>, KVM list <kvm@vger.kernel.org>
To: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
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On 07/31/2012 09:51 AM, Aneesh Kumar K.V wrote:
> Avi Kivity <avi@redhat.com> writes:
> 
>> Having an annoying bug on i386 kvm I decided to debug it buy running an
>> i386 guest on my x86_64 host, use 9p to access a guest image, and run it
>> using nested kvm.
>>
>> However, 9p appears to be broken: first, the configure test fails (patch
>> sent).  Second, while mount works, ls on the mount point causes qemu to
>> crash with
> 
> I missed that you have already sent a patch for configure fix. That
> looks better that what i sent. I will ack that patch 
> 
>>
>> (gdb) bt
>> #0  error_set (errp=0x7fffe95fb128, fmt=0x5555558d4568 "{ 'class':
>> 'VirtFSFeatureBlocksMigration', 'data': { 'path': %s, 'tag': %s } }") at
>> /home/tlv/akivity/qemu/error.c:32
>> #1  0x000055555567cb06 in v9fs_attach (opaque=0x7fffe95e3020) at
>> /home/tlv/akivity/qemu/hw/9pfs/virtio-9p.c:988
>> #2  0x000055555561d19f in coroutine_trampoline (i0=1449767888, i1=21845)
>> at /home/tlv/akivity/qemu/coroutine-ucontext.c:138
>> #3  0x00007ffff5a93ef0 in ?? ()	from /lib64/libc.so.6
>> #4  0x00007fffffffce00 in ?? ()
>> #5  0x0000000000000000 in ?? (
>>
>> **errp already points to a VirtFSFeatureBlocksMigration error;
>> v9fs_attach() has been called a second time (the first time,
>> understandably, on mount; the second on ls).
>>
> 
> Why are we calling attach a second time ?. I am also not able to reproduce this
> 
> root@qemu-img-64:~# mount -t 9p -otrans=virtio,version=9p2000.L v_tmp /mnt
> root@qemu-img-64:~# ls /mnt/a.c
> /mnt/a.c
> 

I'm just doing ls /mnt (even tab completion: ls /mn<TAB> crashes qemu).

-- 
error compiling committee.c: too many arguments to function