linux-kernel - Re: BFS vs. mainline scheduler benchmarks and measurements

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Date:	Thu, 10 Sep 2009 12:09:46 +0200
From:	Jens Axboe <jens.axboe@...cle.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Mike Galbraith <efault@....de>,
	Con Kolivas <kernel@...ivas.org>, linux-kernel@...r.kernel.org
Subject: Re: BFS vs. mainline scheduler benchmarks and measurements

On Thu, Sep 10 2009, Ingo Molnar wrote:
> 
> * Jens Axboe <jens.axboe@...cle.com> wrote:
> 
> > I went to try -tip btw, but it crashes on boot. Here's the 
> > backtrace, typed manually, it's crashing in 
> > queue_work_on+0x28/0x60.
> > 
> > Call Trace:
> >         queue_work
> >         schedule_work
> >         clocksource_mark_unstable
> >         mark_tsc_unstable
> >         check_tsc_sync_source
> >         native_cpu_up
> >         relay_hotcpu_callback
> >         do_forK_idle
> >         _cpu_up
> >         cpu_up
> >         kernel_init
> >         kernel_thread_helper
> 
> hm, that looks like an old bug i fixed days ago via:
> 
>   00a3273: Revert "x86: Make tsc=reliable override boot time stability checks"
> 
> Have you tested tip:master - do you still know which sha1?

It was -tip pulled this morning, 2-3 hours ago. I don't have the sha
anymore, but it was a fresh pull today.

-- 
Jens Axboe

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