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Btrfs-progs: man: nodesize must be power of 2 now

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This updates mkfs.btrfs's man page with the new limitation that nodesize must
be a power of 2 as well.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Liu Bo 2017-06-27 15:25:45 -06:00 committed by David Sterba
parent bf95b303f4
commit c58d13eeba
1 changed files with 2 additions and 2 deletions
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Documentation/mkfs.btrfs.asciidoc
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@ -76,8 +76,8 @@ Alias for --nodesize. Deprecated.
*-n|--nodesize <size>*::
Specify the nodesize, the tree block size in which btrfs stores metadata. The
default value is 16KiB (16384) or the page size, whichever is bigger. Must be a
multiple of the sectorsize, but not larger than 64KiB (65536). Leafsize always
equals nodesize and the options are aliases.
multiple of the sectorsize and a power of 2, but not larger than 64KiB (65536).
Leafsize always equals nodesize and the options are aliases.
+
Smaller node size increases fragmentation but lead to higher b-trees which in
turn leads to lower locking contention. Higher node sizes give better packing