[Bugs] [Bug 1315727] New: Tier: Synchronization required in tier_run function

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1315727

            Bug ID: 1315727
           Summary: Tier: Synchronization required in tier_run function
           Product: GlusterFS
           Version: mainline
         Component: tiering
          Assignee: bugs at gluster.org
          Reporter: rkavunga at redhat.com
        QA Contact: bugs at gluster.org
                CC: bugs at gluster.org



Description of problem:

Two threads one for promotion and another for demotion writing/reading a
variable without taking locks which can lead into inconsistency.

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

mainline

How reproducible:

never tried

Steps to Reproduce:
1.
2.
3.

Actual results:


Expected results:


Additional info:

Also serialization is required for defrag->defrag_status variable.

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