[Bugs] [Bug 1519598] New: Reduce lock contention on protocol client manipulating fd

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1519598

            Bug ID: 1519598
           Summary: Reduce lock contention on protocol client manipulating
                    fd
           Product: GlusterFS
           Version: mainline
         Component: protocol
          Assignee: bugs at gluster.org
          Reporter: zhhuan at gmail.com
                CC: bugs at gluster.org



Description of problem:

Current use of a per-client mutex to protect fdctx introduces lock contentions
when there are dozens of file operations active.

Need to break the lock down and use finer grain spinlock to reduce contention.

Version-Release number of selected component (if applicable):
mainline

How reproducible:


Steps to Reproduce:
1.
2.
3.

Actual results:


Expected results:


Additional info:

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