linux-kernel - Re: [PATCH 2/5] virtio: support unlocked queue kick

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Message-ID: <20111006084218.GA16511@stefanha-thinkpad.localdomain>
Date:	Thu, 6 Oct 2011 09:42:18 +0100
From:	Stefan Hajnoczi <stefanha@...ux.vnet.ibm.com>
To:	Christoph Hellwig <hch@...radead.org>
Cc:	Rusty Russell <rusty@...tcorp.com.au>,
	Chris Wright <chrisw@...s-sol.org>,
	Jens Axboe <axboe@...nel.dk>, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/5] virtio: support unlocked queue kick

On Wed, Oct 05, 2011 at 03:54:05PM -0400, Christoph Hellwig wrote:
> Split virtqueue_kick to be able to do the actual notification outside the
> lock protecting the virtqueue.  This patch was originally done by
> Stefan Hajnoczi, but I can't find the original one anymore and had to
> recreated it from memory.  Pointers to the original or corrections for
> the commit message are welcome.

Here is the patch:
https://github.com/stefanha/linux/commit/a6d06644e3a58e57a774e77d7dc34c4a5a2e7496

Or as an email if you want to track it down in your inbox:
http://www.spinics.net/lists/linux-virtualization/msg14616.html

The code you posted is equivalent, the only additional thing my patch
did was to update doc comments in include/linux/virtio.h.  Feel free to
grab my patch or just the hunk.

Stefan
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