NetBSD Problem Report #47117

From campbell@mumble.net  Tue Oct 23 22:11:32 2012
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Date: Tue, 23 Oct 2012 22:10:53 +0000 (UTC)
From: Taylor R Campbell <campbell+netbsd@mumble.net>
Reply-To: Taylor R Campbell <campbell+netbsd@mumble.net>
To: gnats-bugs@gnats.NetBSD.org
Subject: lockstat output doesn't show caller of genfs_lock or vn_lock
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>Number:         47117
>Category:       kern
>Synopsis:       lockstat output doesn't show caller of genfs_lock or vn_lock
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          change-request
>Submitter-Id:   net
>Arrival-Date:   Tue Oct 23 22:15:00 +0000 2012
>Originator:     Taylor R Campbell <campbell+netbsd@mumble.net>
>Release:        NetBSD 6.99.14
>Organization:
>Environment:
Architecture: any
Machine: any
>Description:

	The vast majority of the rwlocks in lockstat output are vnode
	locks, for which it only displays genfs_lock as the taker of
	the lock.  It might be nice if it were easier to see who wanted
	the lock in order to get an idea of which operations the
	contention lies in.

>How-To-Repeat:

	Run lockstat while doing file system stuff.  Fail to attain
	enlightenment.  Put on a sad face.

>Fix:

	Yes, please!

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