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

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Message-Id: <201101190956.10137.rusty@rustcorp.com.au>
Date:	Wed, 19 Jan 2011 09:56:09 +1030
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	Christoph Hellwig <hch@....de>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] virtio_blk: allow re-reading config space at runtime

On Tue, 18 Jan 2011 10:57:51 pm Christoph Hellwig wrote:
> 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.

Yes, but can we keep a workqueue struct around?

Rusty.
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