Updated md multipath extensions available (vs 2.4.21pre5)

Hi Neil and Ingo,

I've rediffed the md-mp patch vs 2.4.21pre5.

The new diff also includes a bugfix where the multipath mode would not
correctly switch to a spare path if the only active path failed. It also
includes a slightly different fix for the "do not derefence sb if
disk_faulty".

Please consider for inclusion in 2.4.21. If it can't go in yet, please tell me
what kind of changes you'd like to have for 2.4.22 instead.

I understand that in particular the CLEAN_PATH ioctl might not be considered a
good thing; I gather that you seem to prefer the hot remove / hot add cycle
instead; I think the CLEAN_PATH ioctl is nicer though.

The patch, together with necessary changes to mdadm to take advantage of this
functionality is at ftp://ftp.suse.com/pub/people/lmb/md-mp/md-mp-2, as soon
as the mirrors have catched up.


Sincerely,
    Lars Marowsky-Brée <lmb@xxxxxxx>

-- 
Principal Squirrel 
SuSE Labs - Research & Development, SuSE Linux AG
  
"If anything can go wrong, it will." "Chance favors the prepared (mind)."
  -- Capt. Edward A. Murphy            -- Louis Pasteur
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