Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754577AbYJCDTa (ORCPT ); Thu, 2 Oct 2008 23:19:30 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754165AbYJCDTW (ORCPT ); Thu, 2 Oct 2008 23:19:22 -0400 Received: from one.firstfloor.org ([213.235.205.2]:46890 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754160AbYJCDTV (ORCPT ); Thu, 2 Oct 2008 23:19:21 -0400 Date: Fri, 3 Oct 2008 05:25:04 +0200 From: Andi Kleen To: Arjan van de Ven Cc: Greg KH , Andi Kleen , Thomas Gleixner , LKML , Linus Torvalds , Andrew Morton , Ingo Molnar , Benjamin Herrenschmidt , Steven Rostedt , Jon Masters , Sven Dietrich Subject: Re: [RFC patch 0/5] genirq: add infrastructure for threaded interrupt handlers Message-ID: <20081003032504.GF8318@one.firstfloor.org> References: <20081001223213.078984344@linutronix.de> <873ajfoy1a.fsf@basil.nowhere.org> <20081002213146.GA9201@kroah.com> <20081002153305.057cf6d9@infradead.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20081002153305.057cf6d9@infradead.org> User-Agent: Mutt/1.4.2.1i Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1259 Lines: 35 On Thu, Oct 02, 2008 at 03:33:05PM -0700, Arjan van de Ven wrote: > On Thu, 2 Oct 2008 14:31:46 -0700 > Greg KH wrote: > > > On Thu, Oct 02, 2008 at 04:46:09PM +0200, Andi Kleen wrote: > > > Thomas Gleixner writes: > > > > > > > > - move long running handlers out of the hard interrupt context > > > > > > I'm not sure I'm really looking forward to this brave new world > > > of very long running interrupt handlers. e.g. what do you > > > do for example when some handler blocks for a very long time? > > > > We have this issue today with some irqs (USB is known for issue > > here...) > > > > So I don't think this is a big issue, and in the end, a better idea as > > it might force us to confront some of the big abusers and fix them. > > > > one of the things irq threads gives you is that 'top' will show you > which ones are eating cpu ;-) oprofile does that job fine already and is imho any time preferable for detailed analysis. -andi -- ak@linux.intel.com -- 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/