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Date:      Sat, 14 Jan 2017 22:57:45 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-bugs@FreeBSD.org
Subject:   [Bug 216087] NFSv4.1 client recovery from NFSERR_BADSESSION might starve recovery thread
Message-ID:  <bug-216087-8@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D216087

            Bug ID: 216087
           Summary: NFSv4.1 client recovery from NFSERR_BADSESSION might
                    starve recovery thread
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs@FreeBSD.org
          Reporter: rmacklem@FreeBSD.org

Created attachment 178895
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D178895&action=
=3Dedit
Patch to give exclusive locker of nfsc_lock priority over shared lockers

When the NFSv4.1 client is doing recovery from a server crash/reboot, the
recovery thread "nfscl" must acquire an exclusive lock on the clientid
(nfsc_lock). This patch gives exclusive lockers priority over shared locker=
s,
so that the "nfscl" recovery won't be starved out (livelocked) by shared
lockers.

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