Messages in this thread | | | Date | Tue, 26 Dec 2006 15:42:57 +0800 | From | Fengguang Wu <> | Subject | Re: [PATCH] Sanely size hash tables when using large base pages. |
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Hi Paul,
On Tue, Dec 26, 2006 at 03:16:52PM +0900, Paul Mundt wrote: > pidhash_shift = max(4, fls(megabytes * 4)); > pidhash_shift = min(12, pidhash_shift); > pidhash_size = 1 << pidhash_shift; > > + size = pidhash_size * sizeof(struct hlist_head); > + if (unlikely(size < PAGE_SIZE)) { > + size = PAGE_SIZE; > + pidhash_size = size / sizeof(struct hlist_head); > + pidhash_shift = 0;
But pidhash_shift is not the order of page ;-)
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