Date: Sat, 28 May 2011 18:03:54 -0700 From: Marcel Moolenaar <marcel@xcllnt.net> To: Nathan Whitehorn <nwhitehorn@freebsd.org> Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org Subject: Re: svn commit: r222434 - head/sys/powerpc/include Message-ID: <ABBF39C3-A934-41F2-A3C3-FB2B3DCF6149@xcllnt.net> In-Reply-To: <4DE19678.3050701@freebsd.org> References: <201105290040.p4T0exUt007185@svn.freebsd.org> <4DE19678.3050701@freebsd.org>
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On May 28, 2011, at 5:42 PM, Nathan Whitehorn wrote: > On 05/28/11 19:40, Marcel Moolenaar wrote: >> Author: marcel >> Date: Sun May 29 00:40:59 2011 >> New Revision: 222434 >> URL: http://svn.freebsd.org/changeset/base/222434 >>=20 >> Log: >> The P4080 has 8 cores. Bump MAXCPU to 8 to match. >=20 > Can we just bump this straight to 32, like on other archs? We're very = near to supporting many-way POWER6 and POWER7 systems anyway, and a = single-socket POWER7 can already have 32 CPUs. We could, but I'm not sure I should be concerned about the "scaling" of the various arrays in the kernel due to MAXCPU. This with an eye on small embedded devices that do 2-way SMP. I've never liked this constant anyway to be honest. It's either too big or too small. I don't think it'll ever be right :-) --=20 Marcel Moolenaar marcel@xcllnt.net
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