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From: | Jay Zhou |
Subject: | Re: [Qemu-devel] [PATCH] migration: optimize the downtime |
Date: | Mon, 31 Jul 2017 15:04:27 +0800 |
User-agent: | Mozilla/5.0 (Windows NT 6.1; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 |
Hi Dave, On 2017/7/25 18:34, Dr. David Alan Gilbert wrote:
After checking the codes of the newest libvirt, I think it is the same in the qemuMigrationWaitForCompletion function, which is used to poll qemu every 50ms.Checking with Jiri Denemark (added to cc), newer libvirt should use events when available - but that polling code is there to cope with older qemu's. So with a newer qemu, i think it should spot the COMPLETED event.
I do tests on the newest libvirt(v3.6.0) + newest qemu(v2.9.90, v2.10.0-rc0-29-ga588c49-dirty). The log added indicates that the source side libvirt spots the COMPLETE event after the cleanup of the source side qemu, i.e. 300ms still exists. BTW, I'm not very familiar with libvirt, if there is something special to configure or I'm missing something, please let me know. Thanks, Jay
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