linux-kernel - Re: [PATCH] virtio_blk: allow re-reading config space at runtime

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Message-ID: <20110118122751.GA27997@lst.de>
Date:	Tue, 18 Jan 2011 13:27:51 +0100
From:	Christoph Hellwig <hch@....de>
To:	Rusty Russell <rusty@...tcorp.com.au>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] virtio_blk: allow re-reading config space at runtime

On Tue, Jan 18, 2011 at 11:38:50AM +1030, Rusty Russell wrote:
> I think we need to do better than this.  What would it take?

I don't think we have much choice.  We're getting called from irq
context, so we'll need to allocate memory to offload things.  That's
unless we keep a thread around that we just need to wake up, which
would be a huge waste of ressources.

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