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CONTAP-302811: Flexcache locking latency seen with writeback enabled flexcache

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core
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Issue

On the cache of a Write-Back enabled Flexcache, If the file is not closed, then the read comes in with the stateid used for write and it works. If the file is closed, then the read comes in with the request for a shared read lock and that results in the cache going to the origin for a retrieve.

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