On Fri, Dec 06, 2002 at 02:44:29AM +0100, Andrea Arcangeli wrote:
> Or it hurts when you can't allocate an inode because such 100M are in
> pagetables on a 64G box and you still have 60G free of highmem.
This is the zone vs. zone watermark stuff that penalizes/fails
allocations made with a given GFP mask from being satisfied by
fallback. This is largely old news wrt. various kinds of inability
to pressure those ZONE_NORMAL (maybe also ZONE_DMA) consumers.
Admission control for fallback is valuable, sure. I suspect the
question akpm raised is about memory utilization. My own issues are
centered around allocations targeted directly at ZONE_NORMAL,
which fallback prevention does not address, so the watermark patch
is not something I'm personally very concerned about.
64GB isn't getting any testing that I know of; I'd hold off until
someone's actually stood up and confessed to attempting to boot
Linux on such a beast. Or until I get some more RAM. =)
Bill
-
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/
This archive was generated by hypermail 2b29 : Sat Dec 07 2002 - 22:00:25 EST