Re: [PATCH] IPv6: Refine IPv6 Address Validation Timer

From: David S. Miller (davem@redhat.com)
Date: Fri Sep 27 2002 - 04:25:15 EST


   From: YOSHIFUJI Hideaki / $B5HF#1QL@(B <yoshfuji@linux-ipv6.org>
   Date: Fri, 27 Sep 2002 18:12:56 +0900 (JST)

This patch has problems.
    
   @@ -1626,24 +1635,32 @@
                    for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) {
                            unsigned long age;
    
   - if (ifp->flags & IFA_F_PERMANENT)
   + spin_lock(&ifp->lock);
   + if (ifp->flags & IFA_F_PERMANENT) {
   + spin_unlock(&ifp->lock);
                                    continue;
   + }

This is completely unnecessary. Nobody modifies the
IFA_F_PERMANENT flag after the addr entry has been added
to the hash table and this runs under the addrconf hash
lock already.

Alexey will have to comment on the rest.
-
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