Messages in this thread |  | | | Date | Thu, 28 Jul 2005 18:31:57 +1000 | | From | Nick Piggin <> | | Subject | Re: Add prefetch switch stack hook in scheduler function |
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Keith Owens wrote: > On Thu, 28 Jul 2005 09:41:18 +0200, > Ingo Molnar <mingo@elte.hu> wrote:
>>i'm wondering, is the switch_stack at the same/similar place as >>next->thread_info? If yes then we could simply do a >>prefetch(next->thread_info). > > > No, they can be up to 30K apart. See include/asm-ia64/ptrace.h. > thread_info is at ~0xda0, depending on the config. The switch_stack > can be as high as 0x7bd0 in the kernel stack, depending on why the task > is sleeping. >
Just a minor point, I agree with David: I'd like it to be called prefetch_task(), because some architecture may want to prefetch other memory.
-- SUSE Labs, Novell Inc.
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