Nit much more after adding this patch
https://bugzilla.kernel.org/attachment.cgi?id=258529
W dniu 2017-09-20 o 15:44, Eric Dumazet pisze:
On Wed, 2017-09-20 at 15:39 +0200, Paweł Staszewski wrote:
W dniu 2017-09-20 o 15:34, Eric Dumazet pisze:
Could you try this debug patch ?
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index
f535779d9dc1dfe36934c2abba4e43d053ac5d6f..1eaa3553a724dc8c048f67b556337072d5addc82
100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -3331,7 +3331,14 @@ void netdev_run_todo(void);
*/
static inline void dev_put(struct net_device *dev)
{
- this_cpu_dec(*dev->pcpu_refcnt);
+ int __percpu *pref = READ_ONCE(dev->pcpu_refcnt);
+
+ if (!pref) {
+ pr_err("no pcpu_refcnt on dev %p(%s) state %d dismantle %d\n",
+ dev, dev->name, dev->reg_state, dev->dismantle);
+ BUG();
+ }
+ this_cpu_dec(*pref);
}
/**
You want me to add this patch to what kernel version ?
currently im after git bisect reset - so mainline stable
Simply us the latest net-next as mentioned in the thread title, thanks.
