From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?ISO-8859-2?Q?Rafa=B3_Bilski?= Subject: [Bug 6426] Working Longhaul driver removed from kernel Date: Sat, 22 Apr 2006 22:42:55 +0200 Message-ID: <444A954F.5030408@interia.pl> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: cpufreq-bounces@lists.linux.org.uk Errors-To: cpufreq-bounces+glkc-cpufreq=m.gmane.org+glkc-cpufreq=m.gmane.org@lists.linux.org.uk Content-Type: text/plain; charset="us-ascii"; format="flowed" To: cpufreq@lists.linux.org.uk > http://bugzilla.kernel.org/show_bug.cgi?id=6426 > > ------- Additional Comments From davej at codemonkey.org.uk 2006-04-22 10:50 ------- > You got lucky. It's completely broken (In part due to the quirky hardware > design of longhaul), and needs significant effort to fix. > (There needs to be infrastructure work done to quiesce dma from IDE/SCSI during > speed transitions, otherwise real bad things can happen ranging from lock-ups, > to disk corruption.) > > It's possible you never hit it because you were using conservative which doesn't > change the speed very often, however in some cases a single transition is enough > to hit the bug. > I try to hang my machine. It's imposible with cpufreq. In worst case there is 2-10 secs freeze. But only when delta f is big (example 532<->997). Only way to hang machine is "modprobe viafb" with hw accel enabled. ---------------------------------------------------------------------- Swietnie zdjecia do poogladania >>> http://link.interia.pl/f192b