This is a note to let you know that I've just added the patch titled net_sched: make qdisc_tree_decrease_qlen() work for non mq to the 4.1-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: net_sched-make-qdisc_tree_decrease_qlen-work-for-non-mq.patch and it can be found in the queue-4.1 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From foo@baz Wed Dec 30 19:52:45 PST 2015 From: Eric Dumazet <edumazet@xxxxxxxxxx> Date: Tue, 15 Dec 2015 09:43:12 -0800 Subject: net_sched: make qdisc_tree_decrease_qlen() work for non mq From: Eric Dumazet <edumazet@xxxxxxxxxx> [ Upstream commit 225734de70cd0a9e0b978f3583a4a87939271d5e ] Stas Nichiporovich reported a regression in his HFSC qdisc setup on a non multi queue device. It turns out I mistakenly added a TCQ_F_NOPARENT flag on all qdisc allocated in qdisc_create() for non multi queue devices, which was rather buggy. I was clearly mislead by the TCQ_F_ONETXQUEUE that is also set here for no good reason, since it only matters for the root qdisc. Fixes: 4eaf3b84f288 ("net_sched: fix qdisc_tree_decrease_qlen() races") Reported-by: Stas Nichiporovich <stasn77@xxxxxxxxx> Tested-by: Stas Nichiporovich <stasn77@xxxxxxxxx> Signed-off-by: Eric Dumazet <edumazet@xxxxxxxxxx> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- net/sched/sch_api.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/net/sched/sch_api.c +++ b/net/sched/sch_api.c @@ -950,7 +950,7 @@ qdisc_create(struct net_device *dev, str } lockdep_set_class(qdisc_lock(sch), &qdisc_tx_lock); if (!netif_is_multiqueue(dev)) - sch->flags |= TCQ_F_ONETXQUEUE | TCQ_F_NOPARENT; + sch->flags |= TCQ_F_ONETXQUEUE; } sch->handle = handle; Patches currently in stable-queue which might be from edumazet@xxxxxxxxxx are queue-4.1/ipv6-sctp-clone-options-to-avoid-use-after-free.patch queue-4.1/tcp-restore-fastopen-with-no-data-in-syn-packet.patch queue-4.1/net_sched-make-qdisc_tree_decrease_qlen-work-for-non-mq.patch queue-4.1/net-fix-ip-early-demux-races.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html