From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751175Ab1ARM16 (ORCPT ); Tue, 18 Jan 2011 07:27:58 -0500 Received: from verein.lst.de ([213.95.11.210]:40835 "EHLO verein.lst.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750706Ab1ARM15 (ORCPT ); Tue, 18 Jan 2011 07:27:57 -0500 Date: Tue, 18 Jan 2011 13:27:51 +0100 From: Christoph Hellwig To: Rusty Russell Cc: linux-kernel@vger.kernel.org Subject: Re: [PATCH] virtio_blk: allow re-reading config space at runtime Message-ID: <20110118122751.GA27997@lst.de> References: <20110114160137.GA18721@lst.de> <201101181138.50421.rusty@rustcorp.com.au> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <201101181138.50421.rusty@rustcorp.com.au> User-Agent: Mutt/1.3.28i X-Spam-Score: 0 () Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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.