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From: Gerd Hoffmann <kraxel@redhat.com>
To: Alexander Graf <agraf@suse.de>
Cc: Kevin Wolf <kwolf@redhat.com>,
	Juan Quintela <quintela@redhat.com>,
	Joerg Roedel <Joerg.Roedel@amd.com>,
	QEMU-devel Developers <qemu-devel@nongnu.org>,
	Stefan Hajnoczi <stefanha@gmail.com>,
	"tj@kernel.org" <tj@kernel.org>,
	Sebastian Herbszt <herbszt@gmx.de>,
	Roland Elek <elek.roland@gmail.com>
Subject: Re: [Qemu-devel] [PATCH 00/10] AHCI emulation support v2
Date: Fri, 19 Nov 2010 15:36:42 +0100	[thread overview]
Message-ID: <4CE68B7A.3060503@redhat.com> (raw)
In-Reply-To: <61136B5B-9282-4667-9AD8-545456CD7FDB@suse.de>

   Hi,

> Also to catch up on Gerd's point - whatever refactoring we do, we
> will basically have to break migration. There is no way we can change
> all the internal state and structure and maintain binary
> compatibility with the old save states.

On the other hand it would be a *real* pity to drag the ide migration 
mess into ahci ...

Ideally each ide-drive should save its state itself, and likewise each 
ide/ahci controller.  Maybe it would be a good first step to move to 
such a model in the savevm data format, but keep the current ide data 
structures for a while so we can easily accept migrations in the old 
savevm format for the time being.

Then a relase or two away from today we'll drop support for the old ide 
savevm format, so we can finally tranform the ide data structures to 
something sane?

Juan?  Comments?

cheers,
   Gerd

      parent reply	other threads:[~2010-11-19 14:37 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-11-18  3:27 [Qemu-devel] [PATCH 00/10] AHCI emulation support v2 Alexander Graf
2010-11-18  3:27 ` [Qemu-devel] [PATCH 01/10] ide: split ide command interpretation off Alexander Graf
2010-11-18  3:27 ` [Qemu-devel] [PATCH 02/10] ide: fix whitespace gap in ide_exec_cmd Alexander Graf
2010-11-18  3:27 ` [Qemu-devel] [PATCH 03/10] ide: add support for ide bus ops Alexander Graf
2010-11-18  3:27 ` [Qemu-devel] [PATCH 04/10] ide: add DMA hooks to " Alexander Graf
2010-11-18  3:27 ` [Qemu-devel] [PATCH 05/10] ide: add ncq identify data for ahci sata drives Alexander Graf
2010-11-18  3:27 ` [Qemu-devel] [PATCH 06/10] pci: add storage class for sata Alexander Graf
2010-11-18  3:27 ` [Qemu-devel] [PATCH 07/10] pci: add ich7 pci id Alexander Graf
2010-11-18  3:27 ` [Qemu-devel] [PATCH 08/10] ahci: add ahci emulation Alexander Graf
2010-11-18  8:01   ` [Qemu-devel] " Gerd Hoffmann
2010-11-18 18:05     ` Alexander Graf
2010-11-19  9:12       ` Gerd Hoffmann
2010-11-19 10:08         ` Roedel, Joerg
2010-11-18  3:27 ` [Qemu-devel] [PATCH 09/10] ahci: add -drive support Alexander Graf
2010-11-18  3:27 ` [Qemu-devel] [PATCH 10/10] ahci: spawn controller on demand Alexander Graf
2010-11-18 10:00 ` [Qemu-devel] Re: [PATCH 00/10] AHCI emulation support v2 Stefan Hajnoczi
2010-11-18 13:26 ` [Qemu-devel] " Kevin Wolf
2010-11-18 18:43   ` Alexander Graf
2010-11-18 20:06     ` Ryan Harper
2010-11-18 23:24       ` Alexander Graf
2010-11-19  9:12         ` Stefan Hajnoczi
2010-11-21  2:32           ` Alexander Graf
2010-11-19  9:15     ` Kevin Wolf
2010-11-19 11:56       ` Gerd Hoffmann
2010-11-19 12:27         ` Kevin Wolf
2010-11-19 13:08       ` Alexander Graf
2010-11-19 13:46         ` Kevin Wolf
2010-11-21  2:19           ` Alexander Graf
2010-11-22  8:45             ` Kevin Wolf
2010-11-19 14:36         ` Gerd Hoffmann [this message]

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