From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 10421 invoked by alias); 27 Jan 2012 14:52:41 -0000 Received: (qmail 10407 invoked by uid 22791); 27 Jan 2012 14:52:39 -0000 X-SWARE-Spam-Status: No, hits=-2.8 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00 X-Spam-Check-By: sourceware.org Received: from localhost (HELO sourceware.org) (127.0.0.1) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Fri, 27 Jan 2012 14:52:27 +0000 From: "dsmith at redhat dot com" To: systemtap@sourceware.org Subject: [Bug uprobes/13539] occasional oops, kernel SEGV, RHEL5, :uprobes:uprobe_free_process+0xba/0x131 Date: Fri, 27 Jan 2012 14:52:00 -0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: systemtap X-Bugzilla-Component: uprobes X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: dsmith at redhat dot com X-Bugzilla-Status: RESOLVED X-Bugzilla-Priority: P2 X-Bugzilla-Assigned-To: systemtap at sourceware dot org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: X-Bugzilla-URL: http://sourceware.org/bugzilla/ Auto-Submitted: auto-generated Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 Mailing-List: contact systemtap-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Post: List-Help: , Sender: systemtap-owner@sourceware.org X-SW-Source: 2012-q1/txt/msg00059.txt.bz2 http://sourceware.org/bugzilla/show_bug.cgi?id=13539 --- Comment #10 from David Smith 2012-01-27 14:51:13 UTC --- (In reply to comment #9) > (In reply to comment #8) > > When testing this on RHEL6 (2.6.32-220.4.1.el6.x86_64.debug), I just saw the > > following (which is still better than an oops): > > > > BUG: MAX_LOCKDEP_KEYS too low! > > turning off the locking correctness validator. > > See the last section in linux/Documentation/lockdep-design.txt -- in summary, > the leading causes are (1) every module load/unload leaks lock classes, and (2) > statically initialized locks create separate classes. > > It might be possible for us to reduce the latter effect, but we can't help the > former. Either way, it's not any sign that we have a problem, just that we've > caused lockdep to exceed its internal maximum. Right. If that list of systemtap modules is loaded concurrently, I think I'll need to look at the testcase. I'd bet that wasn't intended. -- Configure bugmail: http://sourceware.org/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug.