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From: | Anthony Liguori |
Subject: | Re: [Qemu-devel] Live migration - exec: support to be reintroduced? |
Date: | Wed, 05 Nov 2008 08:14:01 -0600 |
User-agent: | Thunderbird 2.0.0.17 (X11/20080925) |
Avi Kivity wrote:
Daniel P. Berrange wrote:We used it to implement save-to-file, exec'ing 'dd'. I'd rather prefer that we had a more explicit 'migrate to a file' capability rather than the hack of execing dd.(qemu) acceptfd blahreceives an file descriptor from the monitor using SCM_RIGHTS and assigns it to the tag 'blah'(qemu) migrate fd:blah migrates to the fd denominated by the tag 'blah' (qemu) closefd blah
This could be generally useful for other things too (like char device redirection).
I'm not sure how many people would really use it though, you're talking about serious unix-fu here.
Regards, Anthony Liguori
You can use literal numbers instead of tags to refer to file descriptors inherited from the environment:(qemu) migrate fd:17
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