On Fri, 2016-07-01 at 15:38 +0800, Ding Tianhong wrote: ... > net/ipv6/addrconf.c | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c > index f555f4f..e294a3d 100644 > --- a/net/ipv6/addrconf.c > +++ b/net/ipv6/addrconf.c > @@ -3284,6 +3284,12 @@ restart: > spin_unlock_bh(&addrconf_hash_lock); > } > > + /* > + * It is safe here to schedule out to avoid softlocking if preempt > + * is disabled. > + */ > + cond_resched(); > + > write_lock_bh(&idev->lock); > > addrconf_del_rs_timer(idev);
Seeing you apparently cooked your patch against an old kernel (which one ?) ... I tried vanilla net-next kernel, and apparently I could not trigger the softlockup you mentioned. Are you sure current kernel has a bug to begin with ? Thanks.
