From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Chubb Date: Fri, 14 Mar 2003 21:57:55 +0000 Subject: Re: [Linux-ia64] Pre-emption patch for IA-64 Message-Id: List-Id: References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-ia64@vger.kernel.org >>>>> "Jesse" = Jesse Barnes writes: Jesse> Just FYI, I tried 2.5.64 out on my Bug Sur, and it seems to work ok Jesse> with the following exceptions: Jesse> o the AT keyboard support seems broken (characters are slow to show Jesse> up on the screen and are sometimes repeated) Jesse> o agp support for 460GX causes a link failure AT keyboard and PS/2 mouse both! Jesse> But by using a USB keyboard and turning off agp support, I was able to Jesse> get an SMP+preempt kernel going, and it seems fine. On a dual McKinley prototype machine I was able to get lockups with preempt under heavy I/O and cpu load (e.g., make -j4 in glibc). I'm waiting for production model McKinleys SMP to retry, as I couldn't reproduce the problem on production-model Itanium 1, and there were no symptoms that I could debug. Also FYI, if you're using posix threads in userland, the port of the next generation library is almost complete, and, with the kernel preemption patch, will give much lower latencies for heavily threaded code, depending on exactly what you're doing. -- Dr Peter Chubb peterc@gelato.unsw.edu.au You are lost in a maze of BitKeeper repositories, all almost the same.