I may be seeing similar issues. Have you tried leaving top -SHa running
and seeing what threads are using CPU when it hangs? I did and saw pid
17 [zfskern{txg_thread_enter}] using lots of CPU but no disk activity
happening. Do you see similar?
Steve
On 05/22/18 04:17, Alexander Leidinger wrote:
Hi,
does someone else experience deadlocks / hangs in ZFS?
What I see is that if on a 2 socket / 4 cores -> 16 threads system I do
a lot in parallel (e.g. updating ports in several jails), then the
system may get into a state were I can login, but any exit (e.g. from
top) or logout of shell blocks somewhere. Sometimes it helps to CTRL-C
all updates to get the system into a good shape again, but most of the
times it doesn't.
On another system at the same rev (333966) with a lot less CPUs (and AMD
instead of Intel), I don't see such a behavior.
Bye,
Alexander.
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