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Message-Id: <201205092320.q49NKH5Q091457@red.freebsd.org>
Date: Wed, 9 May 2012 23:20:17 GMT
From: Ryan Stone <rstone@FreeBSD.org>
To: freebsd-gnats-submit@FreeBSD.org
Subject: lockstat provider probes don't always fire
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>Number:         167763
>Category:       kern
>Synopsis:       lockstat provider probes don't always fire
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    markj
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed May 09 23:30:01 UTC 2012
>Closed-Date:    
>Last-Modified:  Mon Apr 21 17:17:59 UTC 2014
>Originator:     Ryan Stone
>Release:        8.2-RELEASE
>Organization:
>Environment:
>Description:
If a lock is acquired or released in the inlined fastpath, the appropriate lockstat probe will not fire if the .c file has not included "opt_kdtrace.h".  This is because the mtx_(un)lock macros do not call the probe if KDTRACE_HOOKS is not defined.
>How-To-Repeat:

>Fix:
KDTRACE_HOOKS may have to move into "opt_global.h"

>Release-Note:
>Audit-Trail:
over to gnn
Responsible-Changed-From-To: freebsd-bugs->gnn 
Responsible-Changed-By: rstone 
Responsible-Changed-When: Wed May 9 23:43:38 UTC 2012 
Responsible-Changed-Why:  
over to gnn 

http://www.freebsd.org/cgi/query-pr.cgi?pr=167763 
Responsible-Changed-From-To: gnn->markj 
Responsible-Changed-By: gnn 
Responsible-Changed-When: Mon Apr 21 17:17:41 UTC 2014 
Responsible-Changed-Why:  
Hand over to the person doing most of the DTrace work. 

http://www.freebsd.org/cgi/query-pr.cgi?pr=167763 
>Unformatted:
