Re: [Qemu-devel] [PATCH v2 00/15] SCSI s/g + SCSI migration + virtio-scsi

[Hu Tao]

On Thu, Jan 19, 2012 at 04:53:30PM +0100, Paolo Bonzini wrote:
> On 01/18/2012 08:39 AM, Hu Tao wrote:
> >Hi Paolo,
> >
> >I found a problem that a virtio-scsi disk gets offline during mkfs.
> >The scsi disk is of 100G or bigger, and the corresponding image
> >is a freshly created qcow2 image. If the disk is small enough, or
> >not freshly created, the problem doesn't appear.
> 
> Hi Hu,
> 
> I cannot reproduce this with a 100G qcow2 image (created with
> "qemu-img create scsi.qcow2 100G" just before launching the host),
> with a partition starting at sector 2048 and extending to the end of
> the disk.  mkfs (ext4) takes less than 1 minute and extends the
> qcow2 file to a little less than 2 gigs.

I've re-tested today, with host kernel 2.6.35.6-45.fc14.x86_64,
2.6.32-71.el6.x86_64, 3.1.0 and 3.3.0-rc1+, qemu version and guest
configuration remain the same, including guest kernel. It apears
that the problem appears only when the host kernel version is 3.1.0.

> 
> Can you send the partition table ("file -s /dev/sda" should be
> enough) and any output you get from the dmesg?

#file -s /dev/sda
/dev/sda: x86 boot sector; partition 1: ID=0x83, starthead 1, startsector 63, 
209712447 sectors, extended partition table (last)\011, code offset 0x0

-- 
Thanks,
Hu Tao

dmesg-virtio-scsi-error-sd-offline-during-mkfs
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