From: Paolo Bonzini <pbonzini@redhat.com>
To: Alexey Kardashevskiy <aik@ozlabs.ru>
Cc: Kevin Wolf <kwolf@redhat.com>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>
Subject: Re: [Qemu-devel] savevm/loadvm
Date: Wed, 09 Oct 2013 09:47:06 +0200 [thread overview]
Message-ID: <525509FA.1070105@redhat.com> (raw)
In-Reply-To: <52550275.7000007@ozlabs.ru>
Il 09/10/2013 09:15, Alexey Kardashevskiy ha scritto:
> Sorry for my ignorance (I never ever touched this part of qemu) but how can
> you possibly avoid block.c while doing savevm? The qcow2 driver must not
> use posix read()/write(), right? So no matter how, all writes end up in
> bdrv_co_do_writev() which changes blocks number. Or use
> raw_aio_readv()/raw_aio_writev() API directly? Please give some more hints.
> Thanks.
I think Kevin was suggesting using qcow_aio_writev directly, or
something like that. But it is not trivial, especially because
save_vm_state takes byte offsets instead of sectors. So for now I'd
still go for the more hacky solution.
Paolo
next prev parent reply other threads:[~2013-10-09 7:47 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-08 8:40 [Qemu-devel] savevm/loadvm Alexey Kardashevskiy
2013-10-08 9:04 ` Paolo Bonzini
2013-10-08 9:23 ` Kevin Wolf
2013-10-08 9:33 ` Paolo Bonzini
2013-10-09 7:15 ` Alexey Kardashevskiy
2013-10-09 7:47 ` Paolo Bonzini [this message]
2013-10-10 3:50 ` Alexey Kardashevskiy
2013-10-16 6:51 ` Alexey Kardashevskiy
2013-11-01 13:22 ` Alexey Kardashevskiy
2013-11-01 14:16 ` Max Reitz
2013-11-03 0:34 ` Alexey Kardashevskiy
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