From: Ingo Molnar <mingo@elte.hu>
To: Roland Dreier <rdreier@cisco.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Early hang with 2.6.21-rc4-rt1
Date: Fri, 30 Mar 2007 11:02:06 +0200 [thread overview]
Message-ID: <20070330090206.GA14324@elte.hu> (raw)
In-Reply-To: <ada648mo4md.fsf@cisco.com>
* Roland Dreier <rdreier@cisco.com> wrote:
> Great, thanks ... I'm not sure which of the 2 patches fixed things,
> but I now got the following trace. I've not really analyzed this, but
> it definitely looks like tun_init() is doing something fishy...
> ("149776 us maximum-latency"!!)
best would be to enable FUNCTION_TRACING and to do:
echo 1 > /proc/sys/kernel/trace_enabled
echo 1 > /proc/sys/kernel/mcount_enabled
this will give you an exact trace of what happened, in
/proc/latency_trace.
Ingo
next prev parent reply other threads:[~2007-03-30 9:02 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-25 5:03 Early hang with 2.6.21-rc4-rt1 Roland Dreier
2007-03-25 5:29 ` Roland Dreier
2007-03-25 7:29 ` Ingo Molnar
2007-03-25 7:34 ` Ingo Molnar
2007-03-25 8:06 ` Ingo Molnar
2007-03-25 16:27 ` Roland Dreier
2007-03-25 7:31 ` Ingo Molnar
2007-03-25 14:35 ` Roland Dreier
2007-03-25 17:01 ` Roland Dreier
2007-03-27 19:22 ` Ingo Molnar
2007-03-27 19:24 ` Ingo Molnar
2007-03-27 19:42 ` Roland Dreier
2007-03-30 9:02 ` Ingo Molnar [this message]
2007-03-30 9:24 ` Ingo Molnar
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