Messages in this thread |  | | Date | Thu, 22 Aug 2002 15:30:13 +0100 (BST) | From | Hugh Dickins <> | Subject | RE: Hyperthreading |
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On Thu, 22 Aug 2002, Nir Soffer wrote: > > Grepping for MPENTIUM4 in the tree only shows up that it causes the > kernel to be compiled with -march=i686, much like M686 and MPENTIUMIII. > Are there more subtle ways it affects the kernel that I missed? (in the > 2.4.x tree)
arch/i386/config.in is where the processor characteristics CONFIG_X86_... are derived from processor type. There's only one difference between the CONFIG_MPENTIUMIII configs and the CONFIG_MPENTIUM4 configs (in 2.4.18 or 2.4.19 or 2.4.20-pre4): CONFIG_X86_L1_CACHE_SHIFT 5 or 7.
Alan, that reminds me: 2.4.20-ac sets CONFIG_X86_L1_CACHE_SHIFT 7 when CONFIG_MPENTIUMIII: looks wrong, but perhaps there's a reason?
Hugh
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