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[INET]: Consolidate the xxx_evictor

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The evictors collect some statistics for ipv4 and ipv6,
so make it return the number of evicted queues and account
them all at once in the caller.

The XXX_ADD_STATS_BH() macros are just for this case,
but maybe there are places in code, that can make use of
them as well.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pavel Emelyanov
2007-10-15 02:40:06 -07:00
committed by David S. Miller
parent 1e4b82873a
commit 8e7999c44e
7 changed files with 52 additions and 80 deletions
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32
net/ipv4/inet_fragment.c
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@@ -140,3 +140,35 @@ void inet_frag_destroy(struct inet_frag_queue *q, struct inet_frags *f,
}
EXPORT_SYMBOL(inet_frag_destroy);
int inet_frag_evictor(struct inet_frags *f)
{
struct inet_frag_queue *q;
int work, evicted = 0;
work = atomic_read(&f->mem) - f->ctl->low_thresh;
while (work > 0) {
read_lock(&f->lock);
if (list_empty(&f->lru_list)) {
read_unlock(&f->lock);
break;
}
q = list_first_entry(&f->lru_list,
struct inet_frag_queue, lru_list);
atomic_inc(&q->refcnt);
read_unlock(&f->lock);
spin_lock(&q->lock);
if (!(q->last_in & COMPLETE))
inet_frag_kill(q, f);
spin_unlock(&q->lock);
if (atomic_dec_and_test(&q->refcnt))
inet_frag_destroy(q, f, &work);
evicted++;
}
return evicted;
}
EXPORT_SYMBOL(inet_frag_evictor);