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author | Pavel Emelyanov <xemul@openvz.org> | 2007-10-15 09:40:06 (GMT) |
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committer | David S. Miller <davem@sunset.davemloft.net> | 2007-10-15 19:26:42 (GMT) |
commit | 8e7999c44ee95e1e90ac91c83557a04e2948f160 (patch) | |
tree | 4295add7b91114fd43eef37d70b664858776dd0d /net/ipv4/inet_fragment.c | |
parent | 1e4b82873af0f21002e37a81ef063d2e5410deb3 (diff) | |
download | linux-8e7999c44ee95e1e90ac91c83557a04e2948f160.tar.xz |
[INET]: Consolidate the xxx_evictor
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>
Diffstat (limited to 'net/ipv4/inet_fragment.c')
-rw-r--r-- | net/ipv4/inet_fragment.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/net/ipv4/inet_fragment.c b/net/ipv4/inet_fragment.c index 15fb2c4..484cf51 100644 --- a/net/ipv4/inet_fragment.c +++ b/net/ipv4/inet_fragment.c @@ -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); |