Messages in this thread | | | From | "Stephen C. Tweedie" <> | Date | Tue, 6 Apr 1999 22:22:28 +0100 (BST) | Subject | Re: [patch] arca-vm-2.2.5 |
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Hi,
On Tue, 6 Apr 1999 20:07:57 +0200 (CEST), Andrea Arcangeli <andrea@e-mind.com> said:
> I was looking at the inode pointer part of the hash function and I think > something like this should be better.
> -#define i (((unsigned long) inode)/(sizeof(struct inode) & ~ (sizeof(struct inode) - 1))) > +#define i (((unsigned long) inode-PAGE_OFFSET)/(sizeof(struct inode) & ~ (sizeof(struct inode) - 1)))
This just ends up adding or subtracting a constant to the hash function, so won't have any effect at all on the occupancy distribution of the hash buckets.
--Stephen
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