Re: Add prefetch switch stack hook in scheduler function

From: Nick Piggin
Date: Thu Jul 28 2005 - 03:50:28 EST

Ingo Molnar wrote:
* Nick Piggin <nickpiggin@xxxxxxxxxxxx> wrote:

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.

such as?

Not sure. thread_info? Maybe next->timestamp or some other fields
in next, something in next->mm?

I didn't really have a concrete example, but in the interests of
being future proof...

SUSE Labs, Novell Inc.

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