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由 Omar Sandoval 提交于
Now we can finally hook up everything so we can actually use free space tree. The free space tree is enabled by passing the space_cache=v2 mount option. On the first mount with the this option set, the free space tree will be created and the FREE_SPACE_TREE read-only compat bit will be set. Any time the filesystem is mounted from then on, we must use the free space tree. The clear_cache option will also clear the free space tree. Signed-off-by: NOmar Sandoval <osandov@fb.com> Signed-off-by: NChris Mason <clm@fb.com>
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