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Re: [Qemu-devel] [PATCH 1/2] Add virtagent file system freeze/thaw
From: |
Jes Sorensen |
Subject: |
Re: [Qemu-devel] [PATCH 1/2] Add virtagent file system freeze/thaw |
Date: |
Tue, 01 Feb 2011 15:36:35 +0100 |
User-agent: |
Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.13) Gecko/20101209 Fedora/3.1.7-0.35.b3pre.fc14 Lightning/1.0b3pre Thunderbird/3.1.7 |
On 02/01/11 15:34, Stefan Hajnoczi wrote:
> On Tue, Feb 1, 2011 at 2:26 PM, Jes Sorensen <address@hidden> wrote:
>> I have to admit you lost me here, where do you get that 500ms time from?
>> Is that the XMLRPC polling time or? I just used the example code from
>> other agent calls.
>
> 500 ms is made up. I was thinking, "what would a reasonable polling
> interval be?" and picked a sub-second number.
>
> Can you explain how the timeout in fsfreeze can happen? It's probably
> because I don't know the virtagent details.
Ah ok.
>From what I understand, the XMLRPC code is setup to timeout if the guest
doesn't reply within a certain amount of time. In that case, the caller
needs to poll to wait for the guest to complete the freeze. This really
should only happen if you have a guest with a large number of very large
file systems. I don't know how likely it is to happen in real life.
Cheers,
Jes
[Qemu-devel] Re: [PATCH 1/2] Add virtagent file system freeze/thaw, Adam Litke, 2011/02/01
[Qemu-devel] Re: [PATCH 1/2] Add virtagent file system freeze/thaw, Michael Roth, 2011/02/01
Re: [Qemu-devel] [PATCH 1/2] Add virtagent file system freeze/thaw, Stefan Hajnoczi, 2011/02/02