Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261179AbVCOMBE (ORCPT ); Tue, 15 Mar 2005 07:01:04 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261180AbVCOMBE (ORCPT ); Tue, 15 Mar 2005 07:01:04 -0500 Received: from mx2.elte.hu ([157.181.151.9]:61653 "EHLO mx2.elte.hu") by vger.kernel.org with ESMTP id S261179AbVCOMBD (ORCPT ); Tue, 15 Mar 2005 07:01:03 -0500 Date: Tue, 15 Mar 2005 13:00:53 +0100 From: Ingo Molnar To: Steven Rostedt Cc: Lee Revell , Andrew Morton , linux-kernel@vger.kernel.org Subject: Re: [patch] Real-Time Preemption, -RT-2.6.11-rc3-V0.7.38-01 Message-ID: <20050315120053.GA4686@elte.hu> References: <20050311153817.GA32020@elte.hu> <1110574019.19093.23.camel@mindpipe> <1110578809.19661.2.camel@mindpipe> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.1i X-ELTE-SpamVersion: MailScanner 4.31.6-itk1 (ELTE 1.2) SpamAssassin 2.63 ClamAV 0.73 X-ELTE-VirusStatus: clean X-ELTE-SpamCheck: no X-ELTE-SpamCheck-Details: score=-4.9, required 5.9, autolearn=not spam, BAYES_00 -4.90 X-ELTE-SpamLevel: X-ELTE-SpamScore: -4 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 970 Lines: 22 * Steven Rostedt wrote: > I've realized that my previous patch had too many problems with the > way the journaling system works. So I went back to my first approach > but added the journal_head lock as one global lock to keep the buffer > head size smaller. I only added the state lock to the buffer head. > I've tested this for some time now, and it works well (for the test at > least). I'll recompile it with PREEMPT_DESKTOP to see if that works > too. good progress - but the global lock may be a scalability worry on upstream though. Would it be possible to just mirror much of the current lock logic, but with spinlocks instead of bitlocks? And there should be no #ifdefs on PREEMPT_RT. 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/