Re: VM-related Oops: 2.4.15pre1

David Woodhouse (dwmw2@infradead.org)
Mon, 19 Nov 2001 08:44:28 +0000

jmerkey@vger.timpanogas.org said:
> This is true. They Generate what's called a "split lock" bus
> transaction where the bus will hold LOCK# low across the several clock
> cycles to complete the write. They are **VERY** heavy, BTW, and
> really cause nasty performance hits.

Is it worth making put_unaligned and get_unaligned on x86 avoid this by
loading/storing the two halves of the required datum separately, then? 

--
dwmw2




-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/