[Re: [OE-core] Dilemma on changes - merge or not to merge (e.g. 6.4)] On 16/08/2023 (Wed 09:55) Rasmus Villemoes wrote:
> On 15/08/2023 15.08, Paul Gortmaker via lists.openembedded.org wrote: > > [Dilemma on changes - merge or not to merge (e.g. 6.4)] On 14/08/2023 (Mon > > 10:54) Richard Purdie wrote: > > > >> Remaining are: > >> * an error upon boot on preempt-rt on qemux86-64 > >> (e.g. > >> https://autobuilder.yoctoproject.org/typhoon/#/builders/72/builds/7616/steps/36/logs/stdio) > >> We'll probably just have to ignore it in parselogs as it has been?? > >> around for a while and nobody seems interested in fixing it upstream. > > > > Just back from vacation and I see an internal report of 10-ish at boot > > it seems to be rate-limited to 10 per boot, so it should never appear > more than those 10ish times: > > static bool report_idle_softirq(void) > { > ... > if (ratelimit >= 10) > return false; > ... > ratelimit++; > ... Amusingly enough - you were looking right at the problem. Just a few stable kernels ago, it was inadvertently ratelimited to zero. :-P https://lists.openembedded.org/g/openembedded-core/message/186343 Paul. -- > } > > (it's all non-atomic/lockfree, so ofc it could just happen to get > emitted 11 or 12 times if the stars align just right...) > > > > > NOHZ tick-stop error: local softirq work is pending, handler #80!!! > > > > ..on the 6.1.43-rt10-yocto-preempt-rt kernel, on real hardware. So it > > seems we can't blame that one entirely on v6.4 kernel (or qemu). > > > > We used to get (late 3.x and 4.x era) pretty common "NOHZ: local softirq > > pending" messages even on common/popular distro kernels. But I haven't > > seen those for a long time and they didn't scream "error" or have the > > alarmist three exclamation marks either. > > FWIW, we're also seeing exactly that "NOHZ tick-stop error" message on > 6.4.6-rt8 running on a couple of different imx8mp based boards. > > Rasmus >
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