path: root/.gitignore
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authorNeilBrown <>2006-01-06 00:20:36 -0800
committerLinus Torvalds <>2006-01-06 08:34:06 -0800
commit2604b703b6b3db80e3c75ce472a54dfd0b7bf9f4 (patch)
tree8c0e985c455ff35af24fbe60d8a3f5a276034370 /.gitignore
parenta24a8dd858e0ba50f06a9fd8f61fe8c4fe7a8d8e (diff)
[PATCH] md: remove personality numbering from md
md supports multiple different RAID level, each being implemented by a 'personality' (which is often in a separate module). These personalities have fairly artificial 'numbers'. The numbers are use to: 1- provide an index into an array where the various personalities are recorded 2- identify the module (via an alias) which implements are particular personality. Neither of these uses really justify the existence of personality numbers. The array can be replaced by a linked list which is searched (array lookup only happens very rarely). Module identification can be done using an alias based on level rather than 'personality' number. The current 'raid5' modules support two level (4 and 5) but only one personality. This slight awkwardness (which was handled in the mapping from level to personality) can be better handled by allowing raid5 to register 2 personalities. With this change in place, the core md module does not need to have an exhaustive list of all possible personalities, so other personalities can be added independently. This patch also moves the check for chunksize being non-zero into the ->run routines for the personalities that need it, rather than having it in core-md. This has a side effect of allowing 'faulty' and 'linear' not to have a chunk-size set. Signed-off-by: Neil Brown <> Signed-off-by: Andrew Morton <> Signed-off-by: Linus Torvalds <>
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