[IPV6]: Don't redo xfrm_lookup for cached dst entries

[linux-2.6] / net / core / dst.c

diff --git a/net/core/dst.c b/net/core/dst.c
index fc434ade5270e1b99770a9a5f91b2a8747a50093..334790da9f160cd6852a35e5186db16cbb3d14b1 100644 (file)
--- a/net/core/dst.c
+++ b/net/core/dst.c
@@ -45,6 +45,7 @@ static struct timer_list dst_gc_timer =
 static void dst_run_gc(unsigned long dummy)
 {
        int    delayed = 0;
+       int    work_performed;
        struct dst_entry * dst, **dstp;
 
        if (!spin_trylock(&dst_lock)) {
@@ -52,9 +53,9 @@ static void dst_run_gc(unsigned long dummy)
                return;
        }
 
-
        del_timer(&dst_gc_timer);
        dstp = &dst_garbage_list;
+       work_performed = 0;
        while ((dst = *dstp) != NULL) {
                if (atomic_read(&dst->__refcnt)) {
                        dstp = &dst->next;
@@ -62,6 +63,7 @@ static void dst_run_gc(unsigned long dummy)
                        continue;
                }
                *dstp = dst->next;
+               work_performed = 1;
 
                dst = dst_destroy(dst);
                if (dst) {
@@ -86,9 +88,14 @@ static void dst_run_gc(unsigned long dummy)
                dst_gc_timer_inc = DST_GC_MAX;
                goto out;
        }
-       if ((dst_gc_timer_expires += dst_gc_timer_inc) > DST_GC_MAX)
-               dst_gc_timer_expires = DST_GC_MAX;
-       dst_gc_timer_inc += DST_GC_INC;
+       if (!work_performed) {
+               if ((dst_gc_timer_expires += dst_gc_timer_inc) > DST_GC_MAX)
+                       dst_gc_timer_expires = DST_GC_MAX;
+               dst_gc_timer_inc += DST_GC_INC;
+       } else {
+               dst_gc_timer_inc = DST_GC_INC;
+               dst_gc_timer_expires = DST_GC_MIN;
+       }
        dst_gc_timer.expires = jiffies + dst_gc_timer_expires;
 #if RT_CACHE_DEBUG >= 2
        printk("dst_total: %d/%d %ld\n",