Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755746AbYFWXwW (ORCPT ); Mon, 23 Jun 2008 19:52:22 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752010AbYFWXwE (ORCPT ); Mon, 23 Jun 2008 19:52:04 -0400 Received: from mx2.mail.elte.hu ([157.181.151.9]:58542 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750895AbYFWXwB (ORCPT ); Mon, 23 Jun 2008 19:52:01 -0400 Date: Tue, 24 Jun 2008 01:51:41 +0200 From: Ingo Molnar To: Anton Vorontsov Cc: linux-ide@vger.kernel.org, Bartlomiej Zolnierkiewicz , Alan Cox , Sergei Shtylyov , linux-kernel@vger.kernel.org, Thomas Gleixner , Steven Rostedt Subject: Re: [PATCH -rt] ide: fix interrupts processing issue with preempt-able hardirqs Message-ID: <20080623235141.GB17297@elte.hu> References: <20080623234037.GA6793@polina.dev.rtsoft.ru> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20080623234037.GA6793@polina.dev.rtsoft.ru> User-Agent: Mutt/1.5.18 (2008-05-17) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.3 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 967 Lines: 22 * Anton Vorontsov wrote: > IDE interrupt handler relies on the fact that, if necessary, hardirqs > will re-trigger on ISR exit. With fully preemtable IRQs this seems to > be not true, since if hardirq thread is currently running, and the > same IRQ raised again, then this IRQ will be simply lost. actually no, that should not happen - if -rt loses an IRQ then something broke in the threaded IRQ code. It's supposed to be a drop-in, compatible IRQ flow with no driver changes needed. ( also, please do not Cc: mainline maintainers to RFC -rt patches, let the -rt maintainers sort out the need for any patch propagation - once the patches are sufficiently cooked. Thanks. ) Ingo -- 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/