[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Qemu-devel] [PATCH 3/3] add live dumping capability

From: Paolo Bonzini
Subject: Re: [Qemu-devel] [PATCH 3/3] add live dumping capability
Date: Thu, 09 Jul 2009 16:06:18 +0200
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1b3pre) Gecko/20090513 Fedora/3.0-2.3.beta2.fc11 Lightning/1.0pre Thunderbird/3.0b2

With the previous cleanups in place, it is easy to trigger
restart when the state machine goes from the COMPLETING to the
COMPLETED state. Besides this, the patch is just simple
scaffolding for the monitor command and to migrate to a file
rather than a pipe (which is a bit simpler because we do not
need non-blocking I/O).

Then this isn't live migration.

Sorry, I cannot understand this remark.

This is functionally equivalent to migrate "exec:dd of=filename", no?

Yes, except for restarting at the end.

If you were truly dumping an actual core file and things remained
"live", that would be compelling, but it would be a lot easier to just
implement that as an external process. If you just used a table that
mapped section names and versions to length, you only really need to
understand the format of ram and cpu save sections.

I already have the code to read ram and cpu save sections. I don't need the "core file" to be ELF; I just need the live state to be dumped with as small downtime as possible, and the live migration support provides that.


reply via email to

[Prev in Thread] Current Thread [Next in Thread]