于 2014/3/4 17:05, Paolo Bonzini 写道:
Il 04/03/2014 09:54, Stefan Hajnoczi ha scritto:
Is there any other proposals to implement vm-snapshot?
See the discussion by Paolo and Andrea about post-copy migration, which
adds kernel memory management features for tracking userspace page
faults. Perhaps you can use that infrastructure to trap guest writes.
That infrastructure actually traps guest reads too. But it's fine, as
they are a superset of guest writes and the image will still be
consistent.
Paolo
I heard that Kernel going to have API to let userspace catch memory
operation, which originally
can be only caught by kernel code. I am not sure how it is now, but if
kernel have it, qemu
can use it more gracefully than modifing migration code.
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