Re: [PATCH -mm] clean up duplicated alloc/free_thread_info

[FUJITA Tomonori]

On Tue, 3 Jun 2008 16:42:25 +1000
Paul Mackerras <paulus@xxxxxxxxx> 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.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/