W dniu 2017-09-20 o 16:40, Eric Dumazet pisze:
On Wed, 2017-09-20 at 16:03 +0200, Paweł Staszewski wrote:
Nit much more after adding this patch
https://bugzilla.kernel.org/attachment.cgi?id=258529
This is why I suggested to replace the BUG() in another mail
So :
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index
f535779d9dc1dfe36934c2abba4e43d053ac5d6f..220cd12456754876edf2d3ef13195e82d70d5c74
100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -3331,7 +3331,15 @@ 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);
+ for (;;)
+ cpu_relax();
+ }
+ this_cpu_dec(*pref);
}
/**
Full panic
https://bugzilla.kernel.org/attachment.cgi?id=258531
I will change patch and apply but later today cause now cant use backup
router as testlab - Internet rush hours if something happens this will
be bed when second router will have bugged kernel :)
