Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932087AbVLPCfF (ORCPT ); Thu, 15 Dec 2005 21:35:05 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751184AbVLPCfF (ORCPT ); Thu, 15 Dec 2005 21:35:05 -0500 Received: from fsmlabs.com ([168.103.115.128]:52147 "EHLO spamalot.fsmlabs.com") by vger.kernel.org with ESMTP id S1751143AbVLPCfD (ORCPT ); Thu, 15 Dec 2005 21:35:03 -0500 X-ASG-Debug-ID: 1134700499-8050-87-0 X-Barracuda-URL: http://10.0.1.244:8000/cgi-bin/mark.cgi Date: Thu, 15 Dec 2005 18:40:27 -0800 (PST) From: Zwane Mwaikambo To: John Hawkes cc: Lee Revell , "Luck, Tony" , Tony Luck , Andrew Morton , linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org, Jack Steiner , Keith Owens , Dimitri Sivanich X-ASG-Orig-Subj: Re: [PATCH] ia64: disable preemption in udelay() Subject: Re: [PATCH] ia64: disable preemption in udelay() In-Reply-To: <00b201c601e6$30c87ff0$d6069aa3@johnhaonw7lw1r> Message-ID: References: <20051214232526.9039.15753.sendpatchset@tomahawk.engr.sgi.com> <20051215225040.GA9086@agluck-lia64.sc.intel.com> <1134698636.12086.222.camel@mindpipe> <00b201c601e6$30c87ff0$d6069aa3@johnhaonw7lw1r> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Barracuda-Spam-Score: 0.00 X-Barracuda-Spam-Status: No, SCORE=0.00 using global scores of TAG_LEVEL=1000.0 QUARANTINE_LEVEL=5.0 KILL_LEVEL=5.0 tests= X-Barracuda-Spam-Report: Code version 3.02, rules version 3.0.6341 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 633 Lines: 18 On Thu, 15 Dec 2005, John Hawkes wrote: > From: "Lee Revell" > > There are 10 drivers that udelay(10000) or more and a TON that > > udelay(1000). Turning those all into 1ms+ non preemptible sections will > > be very bad. > > What about 100usec non-preemptible sections? > John Hawkes 100usec should be ok as a non-preemptible udelay is this 1 specific driver? - 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/