Re: ipv6 not bringing up due to qdisc_tx_is_noop failing
On Wed, Mar 16, 2016 at 7:07 PM, Hannes Frederic Sowa wrote: > Hello, Hi, > > On 16.03.2016 16:29, Nikolay Borisov wrote: >> >> I have stack traces which do show this sequence of events, so my >> questions now are: >> >> 1. What's the difference between netdev_queue->qdisc and >> netdev_queue->qdisc_sleeping. Git blaming indicates those member haves >> existed even before the git history was started. > > qdisc_sleeping is the qdisc you configure before the device is brought up. > It should transition during carrier up to the normal qdisc. > >> 2. Shouldn't the netdev_queue->qdisc also be updated during >> attach_one_default_qdisc? > > Yes, do you have carrier up on your card? Actually no, the interface indeed shows no carrier yet ibping to other hosts on the infiniband network works and ibstats shows the link as being in up state. Do you have any ideas how to debug this further? > > Is this a regression, did this work for you and stopped working with a > specific kernel version? I don't think this is a regression. > > Thanks and bye, > Hannes >
Re: ipv6 not bringing up due to qdisc_tx_is_noop failing
On 16.03.2016 18:14, Nikolay Borisov wrote: On Wed, Mar 16, 2016 at 7:07 PM, Hannes Frederic Sowa wrote: On 16.03.2016 16:29, Nikolay Borisov wrote: I have stack traces which do show this sequence of events, so my questions now are: 1. What's the difference between netdev_queue->qdisc and netdev_queue->qdisc_sleeping. Git blaming indicates those member haves existed even before the git history was started. qdisc_sleeping is the qdisc you configure before the device is brought up. It should transition during carrier up to the normal qdisc. 2. Shouldn't the netdev_queue->qdisc also be updated during attach_one_default_qdisc? Yes, do you have carrier up on your card? Actually no, the interface indeed shows no carrier yet ibping to other hosts on the infiniband network works and ibstats shows the link as being in up state. Do you have any ideas how to debug this further? Probably something in the driver should call netif_carrier_on if carrier is connectivity is available. I don't have enough knowledge about IB how carrier detection is done there. Is this a regression, did this work for you and stopped working with a specific kernel version? I don't think this is a regression. Okay, thanks. Bye, Hannes
Re: ipv6 not bringing up due to qdisc_tx_is_noop failing
Hello, On 16.03.2016 16:29, Nikolay Borisov wrote: I have stack traces which do show this sequence of events, so my questions now are: 1. What's the difference between netdev_queue->qdisc and netdev_queue->qdisc_sleeping. Git blaming indicates those member haves existed even before the git history was started. qdisc_sleeping is the qdisc you configure before the device is brought up. It should transition during carrier up to the normal qdisc. 2. Shouldn't the netdev_queue->qdisc also be updated during attach_one_default_qdisc? Yes, do you have carrier up on your card? Is this a regression, did this work for you and stopped working with a specific kernel version? Thanks and bye, Hannes
