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yaml --- r: 214814 b: refs/heads/master c: 6d0722a h: refs/heads/master v: v3
git-mirror · Sep 30, 2010 · 6320cd3 · 6320cd3
1 parent 8c27118
commit 6320cd3
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Showing 2 changed files with 5 additions and 5 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 9812cb12c9d58c5d9aead84eb2e7864c68c80302
+refs/heads/master: 6d0722a2cec2c23db3b0855ff8bb433175a16b44
diff --git a/trunk/net/ipv4/ip_gre.c b/trunk/net/ipv4/ip_gre.c
@@ -64,13 +64,13 @@
    We cannot track such dead loops during route installation,
    it is infeasible task. The most general solutions would be
    to keep skb->encapsulation counter (sort of local ttl),
-   and silently drop packet when it expires. It is the best
+   and silently drop packet when it expires. It is a good
    solution, but it supposes maintaing new variable in ALL
    skb, even if no tunneling is used.
 
-   Current solution: HARD_TX_LOCK lock breaks dead loops.
-
-
+   Current solution: xmit_recursion breaks dead loops. This is a percpu
+   counter, since when we enter the first ndo_xmit(), cpu migration is
+   forbidden. We force an exit if this counter reaches RECURSION_LIMIT
 
    2. Networking dead loops would not kill routers, but would really
    kill network. IP hop limit plays role of "t->recursion" in this case,