[Bugs] [Bug 1191030] New: Use rcu to protect concurrent access to data structures in GlusterD

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1191030

            Bug ID: 1191030
           Summary: Use rcu to protect concurrent access to data
                    structures in GlusterD
           Product: GlusterFS
           Version: mainline
         Component: glusterd
          Severity: medium
          Priority: high
          Assignee: kaushal at redhat.com
          Reporter: kaushal at redhat.com
                CC: bugs at gluster.org, gluster-bugs at redhat.com



GlusterD has issues with concurrent access to data structures, which exist even
with the usage of big-lock. To fix these issues, we will use RCU as the
synchronization protection mechanism and use the userspace-rcu library to help
with the implementation.

More details regarding the existing issues and RCU can be found in the mailing
thread archived at
http://www.gluster.org/pipermail/gluster-devel/2014-December/043382.html

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