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os/bluestore: add support for allocating 0-sized extent
authorxie xingguo <xie.xingguo@zte.com.cn>
Wed, 6 Jul 2016 07:13:38 +0000 (15:13 +0800)
committerxie xingguo <xie.xingguo@zte.com.cn>
Sun, 10 Jul 2016 13:25:52 +0000 (21:25 +0800)
commitaf82dbcbeb965a7524d72f597e21433771892f9a
tree78c3591a673165218789f74d658a4d1d599f66f4
parent39458dd30879120f60c01b36d3ac65a1bb44ee81
os/bluestore: add support for allocating 0-sized extent

For testing, we may choose randomized length of extent to allocate,
which means we could trim down the length to 0.

Signed-off-by: xie xingguo <xie.xingguo@zte.com.cn>
src/os/bluestore/BitMapAllocator.cc