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ceph: fix cache revoke race
authorYan, Zheng <zheng.z.yan@intel.com>
Fri, 22 Nov 2013 05:50:45 +0000 (13:50 +0800)
committerYan, Zheng <zheng.z.yan@intel.com>
Tue, 21 Jan 2014 05:29:32 +0000 (13:29 +0800)
handle following sequence of events:

- non-auth MDS revokes Fc cap. queue invalidate work
- auth MDS issues Fc cap through request reply. i_rdcache_gen gets
  increased.
- invalidate work runs. it finds i_rdcache_revoking != i_rdcache_gen,
  so it does nothing.

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

No differences found
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