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Re: bin/55383: lvm is called before raidframe

The following reply was made to PR bin/55383; it has been noted by GNATS.

From: (Michael van Elst)
Subject: Re: bin/55383: lvm is called before raidframe
Date: Sat, 13 Jun 2020 08:39:58 -0000 (UTC) writes:
 >	I have several raid volumes which do not autoconfigure for
 >	whatever reason, so I need to start raidframe.  Might have had
 >	something to do with having higher-number raid volumes as sub-raids
 >	of the lower number (raid2 == raid20 + raid21)?  I don't know.
 Hierarchical RAID sets don't autoconfigure. Add autocnfig time, the driver
 only searches disk partitions (and wedges) of type raid and assembles raid
 sets from these. For hierarchical raids that process would need to recurse.
 Most useful would be a mechanism that incrementally builds raid sets
 and scans disks for raid compoments when they attach (like we scan
 for wedges now). That would support hierarchical raids and also
 support hot-plug disks. If that's not needed for the root, it could
 be implemented as a devpubd hook. Of course devpubd should then run
 much earlier...
                                 Michael van Elst
                                 "A potential Snark may lurk in every tree."

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