Joe Thornber 71fd5ae25d dm persistent data: remove space map ref_count entries if redundant ...

Save space by removing entries from the space map ref_count tree if
they're no longer needed.

Ref counts are stored in two places: a bitmap if the ref_count is
below 3, or a btree of uint32_t if 3 or above.

When a ref_count that was above 3 drops below we can remove it from
the tree and save some metadata space.  This removal was commented out
before because I was unsure why this was causing under-populated btree
nodes.  Earlier patches have fixed this issue.

Signed-off-by: Joe Thornber <[email protected]>
Signed-off-by: Mike Snitzer <[email protected]>
Signed-off-by: Alasdair G Kergon <[email protected]>

2012-03-28 18:41:27 +01:00

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dm-block-manager.c

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dm-block-manager.h

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dm-btree-internal.h

dm persistent data: remove redundant value_size arg from value_ptr

2012-03-28 18:41:25 +01:00

dm-btree-remove.c

dm persistent data: remove redundant value_size arg from value_ptr

2012-03-28 18:41:25 +01:00

dm-btree-spine.c

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dm-btree.c

dm persistent data: remove redundant value_size arg from value_ptr

2012-03-28 18:41:25 +01:00

dm-btree.h

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dm-persistent-data-internal.h

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dm-space-map-checker.c

device-mapper: using EXPORT_SYBOL in dm-space-map-checker.c needs export.h

2011-11-07 10:29:10 -08:00

dm-space-map-checker.h

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dm-space-map-common.c

dm persistent data: remove space map ref_count entries if redundant

2012-03-28 18:41:27 +01:00

dm-space-map-common.h

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dm-space-map-disk.c

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dm-space-map-disk.h

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dm-space-map-metadata.c

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dm-space-map-metadata.h

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dm-space-map.h

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dm-transaction-manager.c

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dm-transaction-manager.h

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Kconfig

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Makefile

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