From mboxrd@z Thu Jan 1 00:00:00 1970 From: Frank Rowand Subject: Re: the current status of RT_PREEMPT for mips Date: Tue, 10 Feb 2009 17:16:41 -0800 Message-ID: <499226F9.5000307@am.sony.com> References: <20955.222.92.8.142.1234138032.squirrel@mail.lemote.com> Reply-To: frank.rowand@am.sony.com Mime-Version: 1.0 Content-Type: text/plain; charset="GB2312" Content-Transfer-Encoding: 7bit Cc: linux-rt-users@vger.kernel.org, linux-kernel@vger.kernel.org To: wuzj@lemote.com Return-path: Received: from outbound-va3.frontbridge.com ([216.32.180.16]:63909 "EHLO VA3EHSOBE002.bigfish.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752952AbZBKBRW (ORCPT ); Tue, 10 Feb 2009 20:17:22 -0500 In-Reply-To: <20955.222.92.8.142.1234138032.squirrel@mail.lemote.com> Sender: linux-rt-users-owner@vger.kernel.org List-ID: wuzj@lemote.com wrote: > HI! > > I'm planning to port RE_PREEMPT to loongson2f(a mipsel compatible > processor), the "FAQ" web page of RTWiKi(rt.wiki.kernel.org) shows that > "There are systems representing the x86, x86_64, ARM, MIPS, and Power > architectures using the CONFIG_PREEMPT_RT patch.", does it means that > RT_PREEMPT support MIPS architecture? because i can not find any more > information about it, I tried to use the latest RT_PREEMPT on qemu > 0.9.1/mipssim, it can not boot, so I come to get your help, could you give > any current status of RT_PREEMPT for mips? such as: > > 1. does the latest RT_PREEMPT(for linux 2.6.26.8) support MIPS > architecture? or any older one support it? > 2. if Yes, which MIPS processors have been successfully running RT_PREEMPT? > > looking forward to your reply, thanks! > > Best Regards, > falcon I do not have information for current versions of the kernel, but last year I was running 2.6.24-rt1 on a Toshiba tx4937 to do some experiments. I have a few trivial patches for the latency tracer, but if you use a newer kernel they are not needed because ftrace replaced the latency tracer in 2.6.24-rt2. -Frank Rowand Sony Corporation of America