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    SubjectRe: [PATCH -mm] clean up duplicated alloc/free_thread_info
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    On Tue, 3 Jun 2008 16:42:25 +1000
    Paul Mackerras <paulus@samba.org> wrote:

    > Pekka Enberg writes:
    >
    > > Yeah, I too have wondered why some architectures use kmalloc() whereas
    > > others use the page allocator. Is THREAD_SIZE significantly smaller
    > > than PAGE_SIZE for those?
    >
    > 64-bit powerpc uses 16k kernel stacks and either 4k or 64k page size.
    > If the page size is 64k then we don't want to allocate a whole page
    > for a kernel stack.

    On powerpc, the patch defines __HAVE_ARCH_THREAD_INFO_ALLOCATOR on the
    THREAD_SHIFT < PAGE_SHIFT case so it doesn't change anything.


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