Messages in this thread | | | Date | Wed, 16 Apr 2003 13:35:39 -0700 | From | Andrew Morton <> | Subject | Re: Reduce struct page by 8 bytes on 64bit |
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Matthew Wilcox <willy@debian.org> wrote: > > Jacob's would break if we hashed to different spinlocks. But we don't, we > shift right by 8, so we get the same spinlock for atomic things that are on > the same "cacheline" (i think PA cachelines are actually 64 or 128 bytes, > depending on model). >
Are you prepared to cast this in stone?
If so then I think Jacob's approach would be preferable, don't you agree?
It needs some compiler-detection magic around the anon union though. - 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/
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