[stgt] RFC [PATCH] Implement PERSISTENT RESERVE IN/OUT

[FUJITA Tomonori]

On Wed, 20 Aug 2008 22:08:02 +0200
Arne Redlich <agr at powerkom-dd.de> wrote:

> > +struct scsi_pr {
> > +	/* Persistent Reservation Generation */
> > +	uint32_t PRgeneration;
> > +	uint8_t pr_key[PR_RESERVATION_SZ][PR_KEY_SZ];
> > +};
> > +
> 
> Too bad the most interesting part is missing - an efficient way to
> lookup the registered keys. I could imagine using a hashtable, but then
> again finding a good hash function is not easy - (u64)key % tablesize
> possibly? So:

I guess that we might need a hash table plus something.

I don't care much about the PR performance (for now at least) as long
as users who don't use PR don't suffer performance drop.
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