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* endless loop in native_flush_tlb_others in smp_64.c
@ 2008-03-10 22:16 Chr
  2008-03-11  9:55 ` Jike Song
  0 siblings, 1 reply; 6+ messages in thread
From: Chr @ 2008-03-10 22:16 UTC (permalink / raw)
  To: linux-kernel

Hi,

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... 

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.

^ permalink raw reply	[flat|nested] 6+ messages in thread

end of thread, other threads:[~2008-03-11 21:43 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2008-03-10 22:16 endless loop in native_flush_tlb_others in smp_64.c Chr
2008-03-11  9:55 ` Jike Song
2008-03-11 10:30   ` Chr
2008-03-11 14:01     ` Pallipadi, Venkatesh
2008-03-11 21:43       ` Chr
2008-03-11 11:09   ` Thomas Gleixner

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