From: Wenji Huang <wenji.huang@oracle.com>
To: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Cc: systemtap@sources.redhat.com
Subject: Bug: duplicate marker entry in Modules.marker
Date: Wed, 19 Mar 2008 03:02:00 -0000 [thread overview]
Message-ID: <47E080D0.2030800@oracle.com> (raw)
In-Reply-To: <20080129160005.GA5561@Krystal>
Hi Mathieu,
When I use marker in 2.6.25-rc5, found there could be duplicate marker
entries in Modules.marker.
It can be reproduced through these steps:
1. define trace_mark(mark1, "format 1, %d",var1). There is the
entry in Modules.marker.
mark1 vmlinux format 1, %d
2. build and boot the kernel
3. modify the marker, such as trace_mark(mark1, "format 2,
%d",var1). There are two entries:
mark1 vmlinux format 1, %d
mark1 vmlinux format 2, %d
Although marker supports multi handlers, the only one marker is defined
in kernel and stap script kernel.mark("mark1")
will be triggered two times.
Best regards,
Wenji
next prev parent reply other threads:[~2008-03-19 3:02 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-29 16:00 Markers usage Mathieu Desnoyers
2008-01-29 16:15 ` Frank Ch. Eigler
2008-03-19 3:02 ` Wenji Huang [this message]
2008-03-19 3:07 ` Bug: duplicate marker entry in Modules.marker Roland McGrath
2008-03-19 7:53 ` Wenji Huang
2008-03-19 8:03 ` Roland McGrath
2008-03-20 1:05 ` Mathieu Desnoyers
2008-03-20 8:29 ` Roland McGrath
2008-03-20 8:38 Roland McGrath
2008-03-20 9:02 ` Wenji Huang
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