Re: Deadlocks / hangs in ZFS

From: Slawa Olhovchenkov <slw_at_zxy.spb.ru>
Date: Tue, 22 May 2018 15:29:24 +0300
On Tue, May 22, 2018 at 08:17:00AM -0400, Steve Wills wrote:

> 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?

Can you try https://reviews.freebsd.org/D7538 and report?

> 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.
> > 
> _______________________________________________
> freebsd-current_at_freebsd.org mailing list
> https://lists.freebsd.org/mailman/listinfo/freebsd-current
> To unsubscribe, send any mail to "freebsd-current-unsubscribe_at_freebsd.org"
Received on Tue May 22 2018 - 10:29:35 UTC

This archive was generated by hypermail 2.4.0 : Wed May 19 2021 - 11:41:16 UTC