[Patch 4/6] per task delay accounting taskstats interface: fixdrop listener only on socket close

[Shailabh Nagar]

Remove listeners from per-cpu listener lists only if they've closed the
socket (resulting in an ECONNREFUSED failure of genetlink unicast). 
For other errors returned by genlmsg_unicast like -EAGAIN which results 
from the receiver's buffer having insufficient space, userspace gets an 
ENOBUF warning and the kernel can continue.

Signed-Off-By: Shailabh Nagar <nagar@xxxxxxxxxxxxxx>
Signed-Off-By: Balbir Singh <balbir@xxxxxxxxxx>
Signed-Off-By: Chandra Seetharaman <sekharan@xxxxxxxxxx>

 kernel/taskstats.c |    2 +-
 1 files changed, 1 insertion(+), 1 deletion(-)

Index: linux-2.6.18-rc1/kernel/taskstats.c
===================================================================
--- linux-2.6.18-rc1.orig/kernel/taskstats.c	2006-07-10 23:44:54.000000000 -0400
+++ linux-2.6.18-rc1/kernel/taskstats.c	2006-07-10 23:44:56.000000000 -0400
@@ -139,7 +139,7 @@ static int send_cpu_listeners(struct sk_
 	down_write(&listeners->sem);
 	list_for_each_entry_safe(s, tmp, &listeners->list, list) {
 		ret = genlmsg_unicast(skb, s->pid);
-		if (ret) {
+		if (ret == -ECONNREFUSED) {
 			list_del(&s->list);
 			kfree(s);
 			rc = ret;


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