[Bugs] [Bug 1518582] Reduce lock contention on fdtable lookup

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1518582



--- Comment #2 from Worker Ant <bugzilla-bot at gluster.org> ---
COMMIT: https://review.gluster.org/18887 committed in master by \"Zhang Huan\"
<zhanghuan at open-fs.com> with a commit message- libglusterfs: use rwlock for
fdtable

To resolve a fd from client requests, need to take a mutex lock for the
fdtable to do the lookup. When a client is busy doing read and write,
the mutex lock could introduce contention. Therefore, use rwlock instead
of mutex to reduce the contention.

Change-Id: Ic833aed738a178a7ea1abafed7eb13814989d28c
BUG: 1518582
Signed-off-by: Zhang Huan <zhanghuan at open-fs.com>

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