On Mon, Aug 06, 2007 at 12:10:53PM -0700, Andrew Morton wrote: > On Mon, 6 Aug 2007 20:59:26 +0200 Andi Kleen <[EMAIL PROTECTED]> wrote: > > > > precious page flag > > > > I always cringe when I hear that. It's really more than node/sparsemem > > use too many bits. If we get rid of 32bit NUMA that problem would be > > gone for the node at least because it could be moved into the mostly > > unused upper 32bit part on 64bit architectures. > > Removing 32-bit NUMA is attractive - NUMAQ we can probably live without, > not sure about summit. But superh is starting to use NUMA now, due to > varying access times of various sorts of memory, and one can envisage other > embedded setups doing that. > > Plus I don't think there are many flags left in the upper 32-bits. ia64 > swooped in and gobbled lots of them, although it's not immediately clear > how many were consumed. > > > The alternative would be to investigate again what it does to the > > kernel to just use different lookup methods for this. > > That's cringeworthy too, I expect.
Perhaps the node info could be pulled out into a parallel and effectively read-only array of shorts. -- Mathematics is the supreme nostalgia of our time. - 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/
