RE: Anticipatory prefaulting in the page fault handler V1
From: Christoph Lameter
Date: Wed Dec 08 2004 - 13:01:20 EST
On Wed, 8 Dec 2004, Luck, Tony wrote:
> >If a fault occurred for page x and is then followed by page
> >x+1 then it may be reasonable to expect another page fault
> >at x+2 in the future.
> What if the application had used "madvise(start, len, MADV_RANDOM)"
> to tell the kernel that this isn't "reasonable"?
We could use that as a way to switch of the preallocation. How expensive
is that check?
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/