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Re: [Qemu-devel] Query regarding bdrv_co_discard
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From: |
Stefan Hajnoczi |
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Subject: |
Re: [Qemu-devel] Query regarding bdrv_co_discard |
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Date: |
Wed, 3 Sep 2014 11:35:54 +0100 |
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User-agent: |
Mutt/1.5.23 (2014-03-12) |
On Tue, Sep 02, 2014 at 02:09:44AM -0700, Sanjay Kumar2 wrote:
> Please let me know how to test bdrv_co_discard interface. I mean what steps I
> need to do on KVM host and inside guest to do end to end testing of this
> interface. I have implemented a network protocol based block driver and
> defined bdrv_co_discard interface as well which free the blocks on the remote
> storage device.
Use a virtio-scsi storage controller and then the guest can send SCSI
discard commands. Make sure to use the -drive ...,discard=unmap option,
otherwise discard commands are silently ignored.
Stefan
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