Date: Thu, 13 Feb 2014 12:51:50 -0800 From: Vijay Singh <vijju.singh@gmail.com> To: hackers@freebsd.org Subject: Debugging rw lock Message-ID: <CALCNsJS6vFJU18F3VRR-T2RdtGNxd3fycUCkQ63BmGp29DAUMw@mail.gmail.com>
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I am running into an issue where an rw lock is read locked and never
unlocked, and causes a system to livelock. I was wondering if its possible
to figure out which thread owns the read lock?
It's the tcp pcbinfo lock.
(kgdb-amd64-7.4-08) show_rwlock rw
name : tcp
class: rw
flags: {SLEEP, INITED, WITNESS, RECURSE, UPGRADABLE}
state: RLOCK: 1 locks
waiters: writers
Any help is appreciated.
-vijay
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