From: Paolo Bonzini <pbonzini@redhat.com>
To: Christoph Hellwig <hch@lst.de>
Cc: qemu-devel <qemu-devel@nongnu.org>,
Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>,
Hannes Reinecke <hare@suse.de>
Subject: Re: [Qemu-devel] virtio-scsi spec, first public draft
Date: Thu, 05 May 2011 14:52:27 +0200 [thread overview]
Message-ID: <4DC29D8B.7030604@redhat.com> (raw)
In-Reply-To: <20110505125058.GA24197@lst.de>
On 05/05/2011 02:50 PM, Christoph Hellwig wrote:
> Please don't repeat the barrier mistake done in the Xen and virtio-blk/lguest
> protocols. It really doesn't make sense to put this kind of strict odering
> in. If we really want ordering let's do it using SCSI ordered tags at least
> to use a standard implementation.
>
> And SCSI already supports the FUA bit to force a write to be writethrough,
> even if the QEMU SCSI code doesn't implement.
You're right, I reviewed the history of barriers and you can consider
this gone.
Paolo
prev parent reply other threads:[~2011-05-05 12:52 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-04 22:28 [Qemu-devel] virtio-scsi spec, first public draft Paolo Bonzini
2011-05-05 9:43 ` Stefan Hajnoczi
2011-05-05 12:49 ` Paolo Bonzini
2011-05-05 14:29 ` Hannes Reinecke
2011-05-05 14:50 ` Paolo Bonzini
2011-05-06 12:31 ` Stefan Hajnoczi
2011-05-06 12:48 ` Paolo Bonzini
2011-05-05 12:50 ` Christoph Hellwig
2011-05-05 12:52 ` Paolo Bonzini [this message]
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