Hi,
On 07/16/2018 10:20 AM, Alexander Duyck wrote: > On Sun, Jul 15, 2018 at 6:30 PM, Chopra, Manish > <manish.cho...@cavium.com> wrote: >> Hello Folks, >> >> I am trying to set below command to try mqprio offload on 4.18 kernel. It is >> throwing the flowing error. >> >> # tc qdisc add dev eth0 root mqprio num_tc 2 map 1 1 1 1 0 0 0 0 >> RTNETLINK answers: Numerical result out of range >> >> I can't really make out what's wrong with the above command, since this >> works fine with other OS kernels. >> Any thoughts if it is something broken on upstream kernel ? >> >> Thanks, >> Manish > > You might need to specify the traffic class for the 8 remaining > priorities. The full map size is 16 entries, not just 8. The default > value for the last 4 mapping entries is TC 3 which would be out of > range if you only have 2 TCs specified. In addition to that, you might hit the same bug we brought up [1] a while ago. If that is the case, a fix was just proposed here [2]. Note that other qdiscs might be broken as well, but we could only spot the issue with mqprio and netem so far. [1] https://patchwork.ozlabs.org/patch/867860/#1893405 [2] https://patchwork.ozlabs.org/patch/944565/ Regards, Jesus > > - Alex >
