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Re: [Qemu-ppc] [PATCH 7/8] pseries: savevm support for PAPR virtual SCSI
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-ppc] [PATCH 7/8] pseries: savevm support for PAPR virtual SCSI |
Date: |
Mon, 03 Jun 2013 08:23:21 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130514 Thunderbird/17.0.6 |
Il 03/06/2013 07:46, Alexey Kardashevskiy ha scritto:
> Ok. I implemented {save|load}_request for IBMVSCSI, started testing - the
> destination system behaves very unstable, sometime it is a fault in
> _raw_spin_lock or it looks okay but any attempt to read the filesystem
> leads to 100% cpu load in qemu process and no response from the guest.
>
> I tried virtio-scsi as well (as it was referred as a good example), it
> fails in exactly the same way. So I started wondering - when did you try it
> last time? :)
Perhaps a year ago. Gerd must have tested usb-storage later than that
though.
> My test is:
> 1. create qcow2 image 8GB, put it to 2GB USB disk.
> 2. put 1.8GB "dummy" image onto the same USB disk.
> 3. run qemu with qcow2 image.
> 4. do "mkfs.ext4 /dev/sda" in the guest. It creates 300MB file when there
> is enough space.
> 5. wait till the source qemu gets stopped due to io error (info status
> confirms this).
> 6. migrate.
> 7. remove "dummy".
> 8. "c"ontinue in the destination guest.
Sounds good. We really need testcases for this. I'll take a look when
I come back from vacation.
Paolo