Re: tracking down i386 mount issue between Aug 2023 and now-- RELENG_13

On 1/16/2024 9:48 AM, mike tancsa wrote:
>
> I dont have truss on the box to attach to the process and ktrace 
> doesnt seem to show anything either.  Does this sort of hang ring a 
> bell for anyone ? Looking back at the git logs, a coarse search for 
> anything to do with mount, doesnt come up with much (2 below).   Also 
> since then a new version of clang so not quite where to start.
>
> Any guidance appreciated. Testing is difficult as the hang doesnt 
> always happen -- sometimes within a day, sometimes 5 days.  ssh is 
> usually borked as well as some processes.  I have a scaled down 
> telegraf agent collecting some basic stats, and the cpu is pegged at 
> 100%. These are single core devices so not sure what is pegging the 
> CPU.  RAM still shows some available so it doesnt seem to be memory 
> pressures.
>
>

Another data point, in one of the test boxes I have running in the lab, 
on the serial console before it became unresponsive, I am seeing


kern.ipc.maxpipekva exceeded; see tuning(7)
kern.ipc.maxpipekva exceeded; see tuning(7)
kern.ipc.maxpipekva exceeded; see tuning(7)
kern.ipc.maxpipekva exceeded; see tuning(7)
kern.ipc.maxpipekva exceeded; see tuning(7)
kern.ipc.maxpipekva exceeded; see tuning(7)
kern.ipc.maxpipekva exceeded; see tuning(7)
kern.ipc.maxpipekva exceeded; see tuning(7)
kern.ipc.maxpipekva exceeded; see tuning(7)
kern.ipc.maxpipekva exceeded; see tuning(7)
kern.ipc.maxpipekva exceeded; see tuning(7)

Beyond that printing out to the console, I cant do anything with the box 
as its not responsive.