Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932630AbWHMAp6 (ORCPT ); Sat, 12 Aug 2006 20:45:58 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932633AbWHMAp6 (ORCPT ); Sat, 12 Aug 2006 20:45:58 -0400 Received: from smtp.osdl.org ([65.172.181.4]:39901 "EHLO smtp.osdl.org") by vger.kernel.org with ESMTP id S932630AbWHMAp5 (ORCPT ); Sat, 12 Aug 2006 20:45:57 -0400 Date: Sat, 12 Aug 2006 17:45:49 -0700 From: Andrew Morton To: David Miller Cc: axboe@suse.de, linux-kernel@vger.kernel.org Subject: Re: softirq considered harmful Message-Id: <20060812174549.9a8f8aeb.akpm@osdl.org> In-Reply-To: <20060812.174324.77324010.davem@davemloft.net> References: <20060810110627.GM11829@suse.de> <20060812162857.d85632b9.akpm@osdl.org> <20060812.174324.77324010.davem@davemloft.net> X-Mailer: Sylpheed version 2.2.7 (GTK+ 2.8.17; x86_64-unknown-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 788 Lines: 20 On Sat, 12 Aug 2006 17:43:24 -0700 (PDT) David Miller wrote: > From: Andrew Morton > Date: Sat, 12 Aug 2006 16:28:57 -0700 > > > Maybe I missed the discussion. But if not, this is yet another case of > > significant changes getting into mainline via a git merge and sneaking > > under everyone's radar. > > Scsi has been doing command completions via a per-cpu softirq handler > for as long as we've had an SMP more advanced than lock_kernel() :-) Is that also adding 150 usecs to each IO operation? - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/