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  1. 16 6月, 2009 4 次提交
    • A
      md: raid0: Remove hash spacing and sector shift. · 8f79cfcd
      由 Andre Noll 提交于 
      The "sector_shift" and "spacing" fields of struct raid0_private_data
were only used for the hash table lookups. So the removal of the
hash table allows get rid of these fields as well which simplifies
create_strip_zones() and raid0_run() quite a bit.
Signed-off-by: NAndre Noll <maan@systemlinux.org>
Signed-off-by: NNeilBrown <neilb@suse.de>
      8f79cfcd
    • A
      md: raid0: Remove hash table. · 09770e0b
      由 Andre Noll 提交于 
      The raid0 hash table has become unused due to the changes in the
previous patch. This patch removes the hash table allocation and
setup code and kills the hash_table field of struct raid0_private_data.
Signed-off-by: NAndre Noll <maan@systemlinux.org>
Signed-off-by: NNeilBrown <neilb@suse.de>
      09770e0b
    • N
      md/raid0: two cleanups in create_stripe_zones. · d27a43ab
      由 NeilBrown 提交于 
      1/ remove current_start.  The same value is available in
     zone->dev_start and storing it separately doesn't gain anything.
2/ rename curr_zone_start to curr_zone_end as we are now more
     focused on the 'end' of each zone.  We end up storing the
     same number though - the old name was a little confusing
     (and what does 'current' mean in this context anyway).
Signed-off-by: NNeilBrown <neilb@suse.de>
      d27a43ab
    • A
      md: raid0: Replace hash table lookup by looping over all strip_zones. · dc582663
      由 Andre Noll 提交于 
      The number of strip_zones of a raid0 array is bounded by the number of
drives in the array and is in fact much smaller for typical setups. For
example, any raid0 array containing identical disks will have only
a single strip_zone.

Therefore, the hash tables which are used for quickly finding the
strip_zone that holds a particular sector are of questionable value
and add quite a bit of unnecessary complexity.

This patch replaces the hash table lookup by equivalent code which
simply loops over all strip zones to find the zone that holds the
given sector.

In order to make this loop as fast as possible, the zone->start field
of struct strip_zone has been renamed to zone_end, and it now stores
the beginning of the next zone in sectors. This allows to save one
addition in the loop.

Subsequent cleanup patches will remove the hash table structure.
Signed-off-by: NAndre Noll <maan@systemlinux.org>
Signed-off-by: NNeilBrown <neilb@suse.de>
      dc582663
  3. 15 6月, 2009 24 次提交
  5. 14 6月, 2009 12 次提交