linux-kernel - Re: Early hang with 2.6.21-rc4-rt1

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20070330090206.GA14324@elte.hu>
Date:	Fri, 30 Mar 2007 11:02:06 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Roland Dreier <rdreier@...co.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Early hang with 2.6.21-rc4-rt1


* Roland Dreier <rdreier@...co.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
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/