Messages in this thread | | | Date | Thu, 29 Oct 1998 04:22:31 +0100 (CET) | From | MOLNAR Ingo <> | Subject | Re: 4MB pages and framebuffer access, x11perf results, 2.1.125 |
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On Wed, 28 Oct 1998, Linus Torvalds wrote:
> layer how complicates it oevrmuch for little gain. The generated code was > fairly horrible when everything checked the 4M bit in the PMD (it's > actualy in the pgd, but I used the pmd macros to clean up the conceptual > idea).
i think the check could be done within pmd_bad() [pgd_bad()] conditions, which branches already exist for all relevant cases. Thus the code path would not differ for normal mappings.
> This is pretty non-negotiable, especially if you ever expect to be able to > back-port any chages like this into 2.2.x.
yep.
-- mingo
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