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Re: [Qemu-devel] Using TRIM to shrink qcow2 images
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From: |
Alexey Kardashevskiy |
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Subject: |
Re: [Qemu-devel] Using TRIM to shrink qcow2 images |
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Date: |
Fri, 04 Oct 2013 17:07:39 +1000 |
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User-agent: |
Mozilla/5.0 (X11; Linux i686 on x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.0 |
On 10/04/2013 05:05 PM, Paolo Bonzini wrote:
> Il 04/10/2013 08:22, Alexey Kardashevskiy ha scritto:
>>
>> btw I tried "discard=on" as you described (with if=virtio) and received
>> an error:
>> address@hidden ~]# fstrim -v /
>> fstrim: /: FITRIM ioctl failed: Operation not supported
>>
>> In my case if=virtio means virtio-blk. If I use virtio-scsi or ibmvscsi,
>> fstrim works just fine but failing virtio-blk bothers me a bit as we
>> might have a bug in ppc64, do not we? (we == ppc64 folks, of course :) )
>>
>
> No, virtio-blk does not support trim.
So the example was broken or if=virtio uses virtio-scsi (instead of
virtio-blk) on x86?
--
Alexey