Re: With Linux 5.5: Filesystem full while still 90 GiB free

[Martin Steigerwald <martin@lichtvoll.de>]

Chris Murphy - 30.01.20, 20:31:40 CET:
> > > Is that mount option sufficient? Or does it take a filtered
> > > balance?
> > > What's the most minimal balance needed? I'm hoping -dlimit=1
> > > 
> > > I can't figure out a way to trigger this though, otherwise I'd be
> > > doing more testing.
> > 
> > I haven't checked but I think the suggested workarounds affect
> > statfs as a side effect. Also as the reservations are temporary,
> > the numbers change again after a sync.
> 
> Yeah I'm being careful to qualify to mortal users that any workarounds
> are temporary and uncertain. I'm not even certain what the pattern
> is, people with new file systems have hit it. A full balance seems to
> fix it, and then soon after the problem happens again. I don't do any
> balancing these days, for over a year now, so I wonder if that's why
> I'm not seeing it.
> 
> But yeah a small number of people are hitting it, but it also stops
> any program that does a free space check (presumably using statfs).
> 
> A more reliable/universal work around in the meantime is still useful;
> in particular if it doesn't require changing mount options, or only
> requires it temporarily (e.g. not added  to /etc/fstab, where it can
> be forgotten for the life of that system).

I did not balance either. Except maybe for a very short time during 
holding trainings in order to show to people how it works.

I never bought into balancing regularily.

Thanks,
-- 
Martin