[ClusterLabs] corosync SCHED_RR stuck at 100% cpu usage with kernel 4.19, priority inversion/livelock?

[Jan Pokorný]

On 20/02/19 21:16 +0100, Klaus Wenninger wrote:
> On 02/20/2019 08:51 PM, Jan Pokorný wrote:
>> On 20/02/19 17:37 +0000, Edwin Török wrote:
>>> strace for the situation described below (corosync 95%, 1 vCPU):
>>> https://clbin.com/hZL5z
>> I might have missed that earlier or this may be just some sort
>> of insignificant/misleading clue:
>> 
>>> strace: Process 4923 attached with 2 threads
>>> strace: [ Process PID=4923 runs in x32 mode. ]
> 
> A lot of reports can be found that strace seems to get this wrong
> somehow.

Haven't ever seen that (incl. today's attempts), but could be:
https://lkml.org/lkml/2016/4/7/823

It's no fun when debugging tools generate more questions than
they are meant to answer.

>> but do you indeed compile corosync using x32 ABI?  (moreover
>> while pristine x86_64 libqb is used, i.e., using 64bit pointers?)
>> 
>> Perhaps would be good to state any such major divergencies if
>> so unless I missed that.

-- 
Jan (Poki)
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