From mboxrd@z Thu Jan 1 00:00:00 1970 From: Manfred Gruber Subject: Re: PI mutex support on ARM Date: Wed, 5 Sep 2007 18:36:02 +0200 Message-ID: <200709051836.02683.m.gruber@tirol.com> References: <200708201453.14641.m.gruber@tirol.com> <200709041348.42229.m.gruber@tirol.com> <3efb10970709050557i24dbdc3bub65a5eea249ae8f1@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Cc: linux-rt-users@vger.kernel.org, tglx@linutronix.de, mingo@elte.hu, williams@redhat.com To: "Remy Bohmer" Return-path: Received: from viefep18-int.chello.at ([213.46.255.22]:25125 "EHLO viefep33-int.chello.at" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1756796AbXIEQgG (ORCPT ); Wed, 5 Sep 2007 12:36:06 -0400 In-Reply-To: <3efb10970709050557i24dbdc3bub65a5eea249ae8f1@mail.gmail.com> Content-Disposition: inline Sender: linux-rt-users-owner@vger.kernel.org List-Id: linux-rt-users.vger.kernel.org hi Remy ! Am Wednesday 05 September 2007 schrieben Sie: > Hello Manfred, > > > My question if I run the pi_stress, my watchdog triggers, if watchdog is > > disabled i get this: > > Is this the correct behaviour ? Or does it show a problem ? > > Depends on the priority of your watchdog-feeder thread. If it is not > running in RT mode, with a priority higher than used in the pi-stress > test, then yes it is normal that the watchdog kicks in. pi-stress > takes 100% CPU-load, and leaves no room for non-RT processes. > > The output you get seems normal to me... Ok, thanks. The only difference between you patch and now 2.6.23-rc4-rt1 is that now a raw_ spinlock is used. So i think when using your patch on 2.6.21.5-rt20, because a customer has this kernel running, i have there also to use a raw_spinlock ? thanks, regards manfred