linux-kernel - Re: endless loop in native_flush_tlb_others in smp

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Date:	Tue, 11 Mar 2008 17:55:40 +0800
From:	"Jike Song" <albcamus@...il.com>
To:	Chr <chunkeey@....de>
Cc:	"Linux Kernel" <linux-kernel@...r.kernel.org>,
	venkatesh.pallipadi@...el.com, "Ingo Molnar" <mingo@...e.hu>,
	"Thomas Gleixner" <tglx@...utronix.de>, len.brown@...el.com
Subject: Re: endless loop in native_flush_tlb_others in smp_64.c

CC added

On Tue, Mar 11, 2008 at 6:16 AM, Chr <chunkeey@....de> wrote:
> Hi,
Hi Chr,
>
>  ever since I moved to 2.6.25-rcY (Y should be between 2 and 5!).
>  I've seen several, but really hard-to-catch instant freezes on my
>  AMD64 Athlon X2 4200+ system...

Here I guess 2.6.24 is fine for you?

>
>  Most of them happend in X.org so at first I thought it had something to do
>  with the NVIDIA module... BUT, one time it froze "a way before" the module
>  could get loaded (and desynced my raid.......).
>
>  ---
>  SYSRQ-P revealed that the CPU were looping inside:
>
>  smp_64.c native_flush_tlb_others:
>  assembler code:
>  < 1ee:   f3 90                   pause
>  < 1f0:   f6 45 00 03             testb  $0x3,0x0(%rbp)
>  < 1f4:   75 f8                   jne    1ee <native_flush_tlb_others+0x5f>
>
>  also known as: (in C)
>
>  while (!cpus_empty(f->flush_cpumask))
>         cpu_relax();
>
>  So... has anyone a good idea what's happening here exactly? Or is there
>  already another topic or even a patch available?
>
>  Regards,
>         Chr.
>  --

Would you please attach your config file?  Do you have CONFIG_CPU_IDLE set?

Regards,
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