From: Nick Piggin <npiggin@suse.de>
Date: Fri, 23 Feb 2007 16:37:43 +0100

quoted text
> So I introduce a new method for resizing hash tables with RCU, and apply
> that to the dentry hash.

Thanks for doing this work Nick.  I'm going to take your ideas
and apply them to an ipv4 routing cache dynamic growth patch I
worked on a while ago.

One minor nit:

quoted text
> +struct dentry_hash {
> +	unsigned int shift;
> +	unsigned long mask;
> +	struct hlist_head *table;
> +};

I don't see any reason to make 'mask' an unsigned long
and this makes this structure take up 8 bytes more than
necessary on 64-bit.
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