From: Ingo Molnar <mingo@elte.hu>
To: kus Kusche Klaus <kus@keba.com>
Cc: linux-kernel@vger.kernel.org, dwalker@mvista.com
Subject: Re: Real-Time Preemption: Magic Sysrq p doesn't work
Date: Mon, 9 May 2005 16:02:58 +0200 [thread overview]
Message-ID: <20050509140257.GA4714@elte.hu> (raw)
In-Reply-To: <AAD6DA242BC63C488511C611BD51F367323204@MAILIT.keba.co.at>
* kus Kusche Klaus <kus@keba.com> wrote:
> I've been asked to analyze the various tools and possibilities
> available to debug an RT kernel.
>
> Up to now, what I've found is not too impressive:
> * Plain GDB can be used to display the current value of kernel variables
> symbolically, but no more: It won't tell anything about the kernel's
> current activity.
> * kgdb and kdb seem to be deeply incompatible with the RT patches (they
> mess with the scheduler, interrupts etc.), applying their patches to an
> RT tree fails quite impressively.
kgdb is in the -mm tree, and there are periodic ports to the -mm tree.
Someone used it too on PREEMPT_RT - with some success. There's no deep
incompatibility with the -RT kernel - just line-for-line collisions.
Ingo
next prev parent reply other threads:[~2005-05-09 14:03 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-05-09 13:07 kus Kusche Klaus
2005-05-09 14:02 ` Ingo Molnar [this message]
2005-05-09 15:37 ` Lee Revell
-- strict thread matches above, loose matches on Subject: below --
2005-05-09 10:58 kus Kusche Klaus
2005-05-09 12:13 ` Ingo Molnar
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