Dne 31. 07. 19 v 11:39 Julian Andres Klode napsal(a):
I don't see how this has anything to do with lvmetad. There is no lvmetad
anymore.
The whole point of 'service' for 'pvscan' is to postone activation of DM
devices outside of udev rule processing.
So whatever is replacing systemd service in your's systemd-less system must
provide similar functionality.
There is currently no way to accept autoactivation capability within
udev-rule processing.
This has nothing to do with the part of the message you are replying too, and
is nonsense. The code to run pvscan directly is shipped, the change just moves
the decision whether to do that from compile-time to run-time.
As long as 'pvscan' is executed with 'auto-activation' option - it can't be
run from udev rule. Any proposal for this needs to first resolve,
how to ensure udev will not try to kill running command in the middle of work.
Until this is resolved - proposal of this can't be accepted upstream.
Dracut uses pretty 'navive' algorithm to run such command with whenever any
new device is found - it's added into lvm2 filters of visible device - once
it succeeds - it can proceed....
For the 'initramdisk' functionality this is IMHO good enough.
(Although there are several very ugly hacks in this code we would like to drop...)
That's a nasty hack.
Yes - we are aware it's ugly hack - but compared with complexity of properly
working event based activation - it's does not look so horrible...
Regards
Zdenek
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