Re: [PATCH 4/4] dmapool: Improve memory usage for devices whichcan't cross boundaries

From: David Miller
Date: Wed Sep 26 2007 - 17:14:55 EST

From: Matthew Wilcox <willy@xxxxxxxxxxxxxxx>
Date: Wed, 26 Sep 2007 15:01:19 -0400

> The previous implementation simply refused to allocate more than a
> boundary's worth of data from an entire page. Some users didn't know
> this, so specified things like SMP_CACHE_BYTES, not realising the
> horrible waste of memory that this was. It's fairly easy to correct
> this problem, just by ensuring we don't cross a boundary within a page.
> This even helps drivers like EHCI (which can't cross a 4k boundary)
> on machines with larger page sizes.
> Signed-off-by: Matthew Wilcox <willy@xxxxxxxxxxxxxxx>

This one looks good to me:

Acked-by: David S. Miller <davem@xxxxxxxxxxxxx>
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at