Messages in this thread |  | | Date | Thu, 08 Nov 2001 23:24:25 -0800 (PST) | Subject | Re: speed difference between using hard-linked and modular drives? | From | "David S. Miller" <> |
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From: Andrew Morton <akpm@zip.com.au> Date: Thu, 08 Nov 2001 23:16:08 -0800
Well on my setup, there are more hash buckets than there are pages in the system. So - basically empty. If memory serves me, never more than two pages in a bucket.
Ok, this is what I expected. The function is tuned for having N_HASH_CHAINS being roughly equal to N_PAGES.
If you want to experiment with smaller hash tables, there are some hacks in the FreeBSD sources that choose a different "salt" per inode. You xor the salt into the hash for each page on that inode. Something like this...
Franks a lot, David S. Miller davem@redhat.com - 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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