From: Christoph Hellwig <hch@lst.de>
To: Hannes Reinecke <hare@suse.de>
Cc: Paolo Bonzini <pbonzini@redhat.com>,
Alexander Graf <agraf@suse.de>,
qemu-devel@nongnu.org, kvm@vger.kernel.org,
Stefan Haynoczi <stefanha@linux.vnet.ibm.com>
Subject: Re: [Qemu-devel] [PATCH][v7] megasas: LSI Megaraid SAS emulation
Date: Tue, 19 Jul 2011 18:08:43 +0200 [thread overview]
Message-ID: <20110719160843.GA3414@lst.de> (raw)
In-Reply-To: <1311074364-3489-1-git-send-email-hare@suse.de>
I've mentioned this a few times before, but just to make sure it's not
lost:
This is a really bad idea for adding to qemu. It's not a controller that
actually speaks a plain SCSI protocol to disks, but a RAID controller, that
has it's own command set for data plan operation, and minimal support for
a few SCSI CDBs around it. I also supports passthrough channels for
CDROMs and other periphals, but using those with disks is not recommended
by LSI, thus explicitly disabled in most drivers and most certainly not
tested. So it fits the qemu model, especially if using scsi-generic
undeneath pretty badly and I don't think it helps us in practice.
next prev parent reply other threads:[~2011-07-19 16:08 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-19 11:19 [Qemu-devel] [PATCH][v7] megasas: LSI Megaraid SAS emulation Hannes Reinecke
2011-07-19 16:08 ` Christoph Hellwig [this message]
2011-07-19 16:39 ` Alexander Graf
2011-07-20 6:50 ` Hannes Reinecke
2012-01-08 21:56 ` Gerhard Wiesinger
2012-01-09 0:10 ` Andreas Färber
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