[linux-lvm] Discussion: performance issue on event activation mode

[Martin Wilck]

On Wed, 2021-10-20 at 09:50 -0500, David Teigland wrote:
> 
> I was just providing some background history after you and Peter both
> mentioned the idea of using RUN instead of IMPORT.  That is, I gave
> up
> trying to use RUN many months ago because it wouldn't work, while
> IMPORT
> actually does what we need, to produce the vgname variable inside the
> rule.

I see. The problem with IMPORT (like RUN, actually) is that it's
required to finish quickly, which might not be the case if we encounter
resource shortage / contention as observed by Heming. If that happens,
the programs started may be killed by udevd, with unpredictable
results.

Regards
Martin