Messages in this thread | | | Date | Fri, 1 Aug 2008 16:17:43 +0200 | From | Andi Kleen <> | Subject | Re: [PATCH 2/2] x86: implement multiple queues for smp function call IPIs |
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> So ... how about my original suggestion, to add a (default-off) boot > option that reduces the queues to 1? I.e. lets have something in place > from day 1 on that could be quirk-handler-driven, should the need arise. > "apic=simpleipi" or something like that. > > In a year or two, once this all has proven itself fine on a broad range > of systems, we'll laugh out loud at being so cautious and can remove the > boot option for good ;-)
I agree that adding a boot option to turn it off is a good idea (assuming it doesn't take too much code to implement) Adding such paranoid boot options early has saved my ass a few times in the past.
Only tricky bit is use if () not "modulo variable", because the if () will be much faster than a division through an arbitary number.
-Andi
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