From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <40AC9B08.7010602@member.fsf.org> Date: Thu, 20 May 2004 12:48:24 +0100 From: Lee Braiden MIME-Version: 1.0 To: linuxppc-dev@lists.linuxppc.org, debian-powerpc@lists.debian.org Subject: Re: SMP kernels on single processor machines References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Sender: owner-linuxppc-dev@lists.linuxppc.org List-Id: Jens Schmalzing wrote: >SMP kernels run >fine on single processor machines. I have repeatedly been told, >however, that this bears a considerable performance hit on some >hardware. Can anybody confirm or deny this? Even small hints would >be appreciated. > > A long time ago, I used to compile SMP into my kernels just on the coolness factor, and on the promise that 'one day, soon, I'll get me a decent machine' :) But I quit doing that at some point, after someone (authoritative, but I can't remember the details) pointed out that it added complexity, debugging issues, etc. Given that I *already* have problems with PPC kernels -- latency/lockups, (preempting?), alsa sound, video res, etc., I personally wouldn't go near this until I'm fairly confident that the other stuff is solid in its own right. But then, I'm just a luser, not a kernel maintainer ;D -- Lee Braiden lee_b@member.fsf.org ** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/