Re: [RFC][PATCH 6/8] mm: handle_speculative_fault()

[Christoph Lameter]

On Tue, 5 Jan 2010, Andi Kleen wrote:

> > Oh well. Somebody who is bored might look at trying to make the wrapper
> > code in arch/x86/lib/semaphore_32.S work on x86-64 too. It should make the
> > successful rwsem cases much faster.
>
> Maybe, maybe not.

What we saw in the past was that the cost of acquiring exclusive
access to the contended cachelines containing mmap_sem and rss counters
was most important.

--
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/