Date: Tue, 08 Nov 2005 18:47:47 +0100 From: David Landgren <david@landgren.net> To: freebsd-smp@freebsd.org Subject: Re: Multi CPU support in 6.0 Message-ID: <4370E4C3.5000204@landgren.net> In-Reply-To: <20051108164520.GA81940@xor.obsecurity.org> References: <01d301c5e3ae$b2461840$b3db87d4@multiplay.co.uk> <20051107152718.GA4743@tara.freenix.org> <10EFEEF4-D1D4-45FC-991C-60A4E60FB391@bnc.net> <20051108164520.GA81940@xor.obsecurity.org>
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And Kris Kennaway did write: > On Mon, Nov 07, 2005 at 05:15:55PM +0100, Achim Patzner wrote: > >>Am 07.11.2005 um 16:27 schrieb Ollivier Robert: >> [...] >>I remember someone writing that the intermediate state of -CURRENT >>while removing the giant lock around the kernel wasn't viable with >>more than four CPUs as it would completely deadlock from time to >>time. I guess we're a bit further down the road... > > > That certainly seems to be the case. You want to use FreeBSD 6.0, > which has excellent performance and stability on SMP in my testing, > even with 14 CPUs. FreeBSD 5.4 is definitely not up to it, since VFS > is under Giant. Well I'm going to take the plunge and bring an HP Netserver LT 6000 with 6 CPUs up from 5.4-STABLE to 6. Are there any obvious additions or subtractions from a 5.x kernel configuration file? Is ADAPTIVE_GIANT now obsolete? Thanks for the tips, David
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