Lines Matching full:obsolete

64  * "Big theory statement" for how we mark blocks obsolete.
67  * that vdev's mapping may no longer be referenced (aka "obsolete").  We
68  * keep track of how much of each mapping entry is obsolete.  When
69  * an entry becomes completely obsolete, we can remove it, thus reducing
72  *  - the entry-specific obsolete count
73  *  - the vdev-specific obsolete spacemap
74  *  - the pool-specific obsolete bpobj
78  * We track the obsolete space for the pool using several objects.  Each
96  *    when marking a DVA as obsolete.  Instead of modifying an arbitrary
98  *    to the end of this object.  When a DVA becomes obsolete, it is
99  *    added to the obsolete space map.  This happens when the DVA is
108  *    ds_deadlist and marked obsolete when they are freed.
111  *    in the pool that need to be marked obsolete.  When a snapshot is
112  *    destroyed, we move some of the ds_remap_deadlist to the obsolete
114  *    asynchronously process the obsolete bpobj, moving its entries to
115  *    the specific vdevs' obsolete space maps.
117  * == Summary of how we mark blocks as obsolete ==
133  * the precise counts of obsolete space for each mapping entry (by
134  * integrating the obsolete spacemap into the obsolete counts) and
148  * 1. Save the old obsolete space map and create a new mapping object
150  *    spa_condensing_indirect_phys with the "previous obsolete space map",
151  *    which is now read only.  Newly obsolete DVAs will be added to a
152  *    new (initially empty) obsolete space map, and will not be
155  * 2. Construct in memory the precise counts of obsolete space for each
156  *    mapping entry, by incorporating the obsolete space map into the
160  *    entries that are not completely obsolete (i.e. which don't have
161  *    obsolete count == mapping length).  (See
180  * obsolete.  With the default of 25%, the amount of space mapped
188  * Condense if the obsolete space map takes up more than this amount of
190  * consumed by the obsolete space map; the default of 1GB is small enough
321  * Mark the given offset and size as being obsolete.
343  * Mark the DVA vdev_id:offset:size as being obsolete in the given tx. This
420 	 * If nothing new has been marked obsolete, there is no
443 	 * obsolete, condense (unless the mapping is already small enough).
450 		zfs_dbgmsg("should condense vdev %llu because obsolete "
459 	 * If the obsolete space map takes up too much space on disk,
463 		zfs_dbgmsg("should condense vdev %llu because obsolete sm "
807  * Sync to the given vdev's obsolete space map any segments that are no longer
810  * If the obsolete space map doesn't exist yet, create and open it.
891  * Gets the obsolete spacemap object from the vdev's ZAP.  On success sm_obj
892  * will contain either the obsolete spacemap object or zero if none exists.
916  * Gets the obsolete count are precise spacemap object from the vdev's ZAP.
1905 	"Minimum obsolete percent of bytes in the mapping "
1914 	"Minimum size obsolete spacemap to attempt condensing");