Re: devfs persistence

From: Michael Marxmeier (
Date: Fri May 05 2000 - 17:34:48 EST

Brian Kress wrote:
> LVM has to run a userspace program vgscan to load the location
> of the lvm partitions into kernelspace. It does this by scanning
> EVERY device in /dev for an LVM signature. While I really like LVM,
Nope. Only block devices.

> this part strikes me as rather unclean. Devfs does help with this
> a bit, since then at least its not scanning non-existant devices. An

/proc/partitions is used. So again only known block devices are
And this needs to be done in order to detect pv signature and
construct the volume groups.

> MD style kernel-based autodetect for LVM would be really nice, but I
> think Heinz is really busy (since LVM 0.8 for 2.2.x still hasn't
> shown up).

IMHO there is no need to rush and bloat the kernel.
It is not too hard to place vgscan/vgchange in the kernel but
there are other options (like a temporary root block device)
which should be considered.
IMHO the initrd aproach should work reasonable for now.


Michael Marxmeier           Marxmeier Software AG
E-Mail:      Besenbruchstrasse 9
Phone : +49 202 2431440     42285 Wuppertal, Germany
Fax   : +49 202 2431420

- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to Please read the FAQ at

This archive was generated by hypermail 2b29 : Sun May 07 2000 - 21:00:18 EST