On Thu, 2007-07-12 at 18:31 +0200, Andrea Arcangeli wrote: > On Fri, Jul 13, 2007 at 12:44:49AM +1000, David Chinner wrote: > > That's crap. Just because a machine has lots of memory does not > > make it OK to waste lots of memory. > > It's not just wasted, it lowers overhead all over the place. Yes, the > benefit of wasting less pagecache may largely outweight the benefit of > having a larger page size, but if you've a lot of memory perhaps your > working set already fits in the cache, or perhaps you don't fit in the > cache regardless of the page size.
Have you guys seen Shaggy's page cache tails? http://kernel.org/pub/linux/kernel/people/shaggy/OLS-2006/kleikamp.pdf We've had the same memory waste issue on ppc64 with 64k hardware pages. -- Dave - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
