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author	Yan, Zheng <zheng.z.yan@intel.com>
	Sat, 3 May 2014 02:46:50 +0000 (10:46 +0800)
committer	Yan, Zheng <zheng.z.yan@intel.com>
	Tue, 6 May 2014 23:10:16 +0000 (07:10 +0800)
commit	22abd7b00698bec773ed5f20c70bd5361dd0229c
tree	a74b6d15537cd9f44fc8e5d2397b734b0d9d2730	tree \| snapshot
parent	6e3501bd31a72f5ef68a8f1213ab2b2c7e92f853	commit \| diff

mds: cancel fragmenting dirfrags when cluster is degraded

when cluster is degraded, acquiring locking can take long time.
It is not good to keep dirfrags in frozen state for a long time.

To allow cancelling fragment operation at any time, this commit
also reorganizes the codes that freeze/fetch dirfrags.

Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>

src/mds/MDCache.cc		diff \| blob \| history
src/mds/MDCache.h		diff \| blob \| history

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