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sunrpc: don't keep expired entries in the auth caches.

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currently expired entries remain in the auth caches as long
as there is a reference.
This was needed long ago when the auth_domain cache used the same
cache infrastructure.  But since that (being a very different sort
of cache) was separated, this test is no longer needed.

So remove the test on refcnt and tidy up the surrounding code.

This allows the cache_dequeue call (which needed to be there to
drop a potentially awkward reference) can be moved outside of the
spinlock which is a better place for it.

Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
This commit is contained in:
NeilBrown 2010-02-03 17:31:31 +11:00 committed by J. Bruce Fields
parent e739cf1da4
commit 3af4974eb2
1 changed files with 5 additions and 8 deletions
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13
net/sunrpc/cache.c
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@ -397,31 +397,28 @@ static int cache_clean(void)
/* Ok, now to clean this strand */
cp = & current_detail->hash_table[current_index];
ch = *cp;
for (; ch; cp= & ch->next, ch= *cp) {
for (ch = *cp ; ch ; cp = & ch->next, ch = *cp) {
if (current_detail->nextcheck > ch->expiry_time)
current_detail->nextcheck = ch->expiry_time+1;
if (ch->expiry_time >= get_seconds() &&
ch->last_refresh >= current_detail->flush_time)
continue;
if (test_and_clear_bit(CACHE_PENDING, &ch->flags))
cache_dequeue(current_detail, ch);
if (atomic_read(&ch->ref.refcount) == 1)
break;
}
if (ch) {
*cp = ch->next;
ch->next = NULL;
current_detail->entries--;
rv = 1;
break;
}
write_unlock(&current_detail->hash_lock);
d = current_detail;
if (!ch)
current_index ++;
spin_unlock(&cache_list_lock);
if (ch) {
if (test_and_clear_bit(CACHE_PENDING, &ch->flags))
cache_dequeue(current_detail, ch);
cache_revisit_request(ch);
cache_put(ch, d);
}