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Re: [Qemu-devel] qmp block-mirror hang, lots of nfs op/s on nfs source d
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From: |
Paolo Bonzini |
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Subject: |
Re: [Qemu-devel] qmp block-mirror hang, lots of nfs op/s on nfs source disk |
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Date: |
Mon, 11 May 2015 13:46:54 +0200 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.5.0 |
On 11/05/2015 13:38, Alexandre DERUMIER wrote:
> Hi,
>
> I'm currently playing with drive-mirror, (qemu 2.2)
>
> and I have qmp hang when drive-mirror is starting.
>
> just after qmp "drive-mirror" exec, qmp socket or hmp are not
> responding.
>
> After some times it's working again, and I can see result of
> query-block-jobs.
>
>
> The source volume is on nfs (v4), and it seem that the bigger the
> volume is, the bigger I need to wait before the mirror begin.
That is because drive-mirror checks the whole disk for allocated areas.
We are aware of that and Fam (CCed) is working on it. Thanks for the
report nevertheless!
Paolo