From: David Gibson <david@gibson.dropbear.id.au>
To: Anthony Liguori <aliguori@us.ibm.com>
Cc: Alexey Kardashevskiy <aik@ozlabs.ru>,
qemu-devel@nongnu.org, Alexander Graf <agraf@suse.de>,
qemu-ppc@nongnu.org, Paolo Bonzini <pbonzini@redhat.com>,
Paul Mackerras <paulus@samba.org>
Subject: Re: [Qemu-devel] [PATCH 03/17] savevm: Implement VMS_DIVIDE flag
Date: Tue, 9 Jul 2013 09:57:01 +1000 [thread overview]
Message-ID: <20130708235701.GE2696@voom.redhat.com> (raw)
In-Reply-To: <877gh029hi.fsf@codemonkey.ws>
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On Mon, Jul 08, 2013 at 01:27:05PM -0500, Anthony Liguori wrote:
> Alexey Kardashevskiy <aik@ozlabs.ru> writes:
>
> > From: David Gibson <david@gibson.dropbear.id.au>
> >
> > The vmstate infrastructure includes a VMS_MULTIPY flag, and associated
> > VMSTATE_VBUFFER_MULTIPLY helper macro. These can be used to save a
> > variably sized buffer where the size in bytes of the buffer isn't directly
> > accessible as a structure field, but an element count from which the size
> > can be derived is.
>
> Why? What's the point of sending the total size vs. the element
> count?
Because it's more convenient to work with the total size at runtime,
and because the VMSTATE stuff works with actual structure fields,
there's not really a way to convert it at migrate time, short of this.
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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next prev parent reply other threads:[~2013-07-09 2:21 UTC|newest]
Thread overview: 92+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-27 6:45 [Qemu-devel] [PATCH 00/17 v3] spapr: migration, pci, msi, power8 Alexey Kardashevskiy
2013-06-27 6:45 ` [Qemu-devel] [PATCH 01/17] pseries: move interrupt controllers to hw/intc/ Alexey Kardashevskiy
2013-07-02 20:54 ` Andreas Färber
2013-07-08 18:15 ` Anthony Liguori
2013-07-08 18:34 ` Alexander Graf
2013-06-27 6:45 ` [Qemu-devel] [PATCH 02/17] pseries: rework XICS Alexey Kardashevskiy
2013-06-27 11:47 ` David Gibson
2013-06-27 12:17 ` Alexey Kardashevskiy
2013-07-02 0:06 ` David Gibson
2013-07-02 0:21 ` Alexander Graf
2013-07-02 2:08 ` Alexey Kardashevskiy
2013-07-08 18:24 ` Anthony Liguori
2013-07-08 18:22 ` Anthony Liguori
2013-07-09 3:40 ` Alexey Kardashevskiy
2013-07-09 4:48 ` Benjamin Herrenschmidt
2013-07-09 13:58 ` Anthony Liguori
2013-07-10 3:06 ` Alexey Kardashevskiy
2013-07-10 3:26 ` Benjamin Herrenschmidt
2013-07-10 12:09 ` Anthony Liguori
2013-06-27 6:45 ` [Qemu-devel] [PATCH 03/17] savevm: Implement VMS_DIVIDE flag Alexey Kardashevskiy
2013-07-08 18:27 ` Anthony Liguori
2013-07-08 23:57 ` David Gibson [this message]
2013-07-09 14:06 ` Anthony Liguori
2013-07-09 14:38 ` David Gibson
2013-06-27 6:45 ` [Qemu-devel] [PATCH 04/17] target-ppc: Convert ppc cpu savevm to VMStateDescription Alexey Kardashevskiy
2013-07-08 18:29 ` Anthony Liguori
2013-07-09 5:14 ` Alexey Kardashevskiy
2013-07-09 14:08 ` Anthony Liguori
2013-07-09 15:11 ` David Gibson
2013-07-10 3:31 ` Benjamin Herrenschmidt
2013-07-10 7:49 ` David Gibson
2013-07-15 13:24 ` Paolo Bonzini
2013-06-27 6:45 ` [Qemu-devel] [PATCH 05/17] pseries: savevm support for XICS interrupt controller Alexey Kardashevskiy
2013-07-08 18:31 ` Anthony Liguori
2013-07-09 0:06 ` Alexey Kardashevskiy
2013-07-09 0:49 ` Anthony Liguori
2013-07-09 0:59 ` Alexey Kardashevskiy
2013-07-09 1:25 ` Anthony Liguori
2013-07-09 3:37 ` Alexey Kardashevskiy
2013-07-15 13:05 ` Paolo Bonzini
2013-07-15 13:13 ` Alexey Kardashevskiy
2013-07-15 13:17 ` Paolo Bonzini
2013-07-09 7:17 ` David Gibson
2013-07-15 13:10 ` Paolo Bonzini
2013-06-27 6:45 ` [Qemu-devel] [PATCH 06/17] pseries: savevm support for VIO devices Alexey Kardashevskiy
2013-07-08 18:35 ` Anthony Liguori
2013-06-27 6:45 ` [Qemu-devel] [PATCH 07/17] pseries: savevm support for PAPR VIO logical lan Alexey Kardashevskiy
2013-07-08 18:36 ` Anthony Liguori
2013-06-27 6:45 ` [Qemu-devel] [PATCH 08/17] pseries: savevm support for PAPR TCE tables Alexey Kardashevskiy
2013-07-08 18:39 ` Anthony Liguori
2013-07-08 21:45 ` Benjamin Herrenschmidt
2013-07-08 22:15 ` Anthony Liguori
2013-07-08 22:41 ` Benjamin Herrenschmidt
2013-07-09 7:20 ` David Gibson
2013-07-09 15:22 ` Anthony Liguori
2013-07-10 7:42 ` David Gibson
2013-07-09 16:26 ` Anthony Liguori
2013-07-15 13:26 ` Paolo Bonzini
2013-07-15 15:06 ` Anthony Liguori
2013-06-27 6:45 ` [Qemu-devel] [PATCH 09/17] pseries: rework PAPR virtual SCSI Alexey Kardashevskiy
2013-07-08 18:42 ` Anthony Liguori
2013-07-15 13:11 ` Paolo Bonzini
2013-06-27 6:45 ` [Qemu-devel] [PATCH 10/17] pseries: savevm support for " Alexey Kardashevskiy
2013-06-27 6:45 ` [Qemu-devel] [PATCH 11/17] pseries: savevm support for pseries machine Alexey Kardashevskiy
2013-07-08 18:45 ` Anthony Liguori
2013-07-08 18:50 ` Alexander Graf
2013-07-08 19:01 ` Anthony Liguori
2013-07-08 21:48 ` Benjamin Herrenschmidt
2013-07-08 22:23 ` Anthony Liguori
2013-06-27 6:45 ` [Qemu-devel] [PATCH 12/17] pseries: savevm support for PCI host bridge Alexey Kardashevskiy
2013-07-08 18:45 ` Anthony Liguori
2013-06-27 6:45 ` [Qemu-devel] [PATCH 13/17] target-ppc: Add helper for KVM_PPC_RTAS_DEFINE_TOKEN Alexey Kardashevskiy
2013-06-27 6:45 ` [Qemu-devel] [PATCH 14/17] pseries: Support for in-kernel XICS interrupt controller Alexey Kardashevskiy
2013-07-08 18:50 ` Anthony Liguori
2013-07-09 3:21 ` Alexey Kardashevskiy
2013-07-09 7:21 ` David Gibson
2013-07-10 3:24 ` Benjamin Herrenschmidt
2013-07-10 7:48 ` David Gibson
2013-06-27 6:45 ` [Qemu-devel] [PATCH 15/17] pseries: savevm support with KVM Alexey Kardashevskiy
2013-06-27 6:45 ` [Qemu-devel] [PATCH 16/17] ppc64: Enable QEMU to run on POWER 8 DD1 chip Alexey Kardashevskiy
2013-07-04 5:54 ` Andreas Färber
2013-07-04 6:26 ` [Qemu-devel] [Qemu-ppc] " Benjamin Herrenschmidt
2013-07-04 6:42 ` [Qemu-devel] " Prerna Saxena
2013-07-10 11:19 ` Alexander Graf
2013-06-27 6:46 ` [Qemu-devel] [PATCH 17/17] spapr-pci: rework MSI/MSIX Alexey Kardashevskiy
2013-07-04 2:31 ` [Qemu-devel] [PATCH 00/17 v3] spapr: migration, pci, msi, power8 Alexey Kardashevskiy
2013-07-04 2:40 ` Anthony Liguori
2013-07-04 2:48 ` Alexey Kardashevskiy
2013-07-08 18:01 ` Anthony Liguori
2013-07-09 6:37 ` Alexey Kardashevskiy
2013-07-09 15:26 ` Anthony Liguori
2013-07-09 14:04 ` Anthony Liguori
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