kernel-panic by kernel 4.14 when linuximq should start.
Roland-F opened this issue · comments
Hello,
with the kernel 4.14 i will get during the startup of my system an kernel-panic (As already told you for the kernel 4.14 series -> #66)
I figured now out the exactly point, when the fault comes up.
The commands will be:
tc qdisc add dev imq0 root handle 10: htb default 6 r2q 1
tc class add dev imq0 parent 10: classid 10:7 htb rate 50000kbit
tc qdisc add dev imq0 parent 10:7 sfq perturb 10
tc qdisc add dev imq1 root handle 20: htb default 4 r2q 1
tc class add dev imq1 parent 20: classid 20:7 htb rate 10000kbit
tc qdisc add dev imq1 parent 20:7 sfq perturb 10
tc class add dev imq1 parent 20:7 classid 20:1 htb rate 200kbit ceil 10000kbit prio 0
(Normaly there will follow some more lines from me configuration)
and exactly when the last line will be activated, the kernel-panic appears.
I use now also iproute2 in version 4.14.1 together with an kernel 4.14.14.
Has someone an identical problem and has maybe solved this already?
It will be great if there come some hints to me, how to solve this.
Try to use your physdev instead imq device.
[root@linux01 ~]# tc qdisc add dev eth0 root handle 20: htb default 4 r2q 1
[root@linux01 ~]# tc class add dev eth0 parent 20: classid 20:7 htb rate 10000kbit
[root@linux01 ~]# tc qdisc add dev eth0 parent 20:7 sfq perturb 10
[root@linux01 ~]# tc class add dev eth0 parent 20:7 classid 20:1 htb rate 200kbit ceil 10000kbit prio 0
Segmentation fault (core dumped)You will see the same. It's a kernel bug.
[Sat Jan 20 12:43:06 2018] BUG: scheduling while atomic: tc/4421/0x00000202
Please report to netdev about this issue.
Fault reported in NETDEV group and give the information, that the fault is also in Kernel 4.15 (4.15.1) inside.
Ask them also to solve that problem including the backport for the 4.14 kernel-line.
Hope that the fix come with the next version (4.15.2 and 4.14.18).
When the next version is out and fix the problem (Kernel 4.14 and 4.15) for me, i will report this here.
Function will not working with 4.15.2 and 4.14.18 as patch for that is not include.
Pre-Patch for the Kernel 4.15 is on: https://patchwork.ozlabs.org/patch/844372/
This patch will work by me and Linuximq can be activated suessfull.
For Kernel 4.14 i have no address as between 4.14 and 4.15 are a lot of things be changed.
Kernel 4.15.3 has the fix included. This will working also for me (No seperate patch need).
Not solved in kernel 4.14.20.
Still open there.
Also Kernel 4.14.23 will not fix the problem :-(
Today is the need patch updated in Kernel 4.14 stable. So the next version (4.14.24) should fix the problem.
Fixed with kernel 4.14.24 and higher.