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Message-ID: <df9815e70803110255s1c8323a8xf05b132ecc406bd0@mail.gmail.com>
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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