Messages in this thread | | | Subject | RE: endless loop in native_flush_tlb_others in smp_64.c | Date | Tue, 11 Mar 2008 07:01:56 -0700 | From | "Pallipadi, Venkatesh" <> |
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>-----Original Message----- >From: chunkeey@web.de [mailto:chunkeey@web.de] >Sent: Tuesday, March 11, 2008 3:31 AM >To: Jike Song >Cc: Linux Kernel; Pallipadi, Venkatesh; Ingo Molnar; Thomas >Gleixner; Brown, Len >Subject: Re: endless loop in native_flush_tlb_others in smp_64.c > >On Tuesday 11 March 2008 10:55:40 Jike Song wrote: >> On Tue, Mar 11, 2008 at 6:16 AM, Chr <chunkeey@web.de> wrote: >> > 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... >> >> Here I guess 2.6.24 is fine for you? >Yes, 2.6.24(.3) is fine! > >> > 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... >> > >> > --- >> > 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? >> >> Would you please attach your config file? Do you have >CONFIG_CPU_IDLE set? >(Attached). Yes, CONFIG_CPU_IDLE is enabled! I guess I should >now disable it, >try again and report back, right?! ;-)
I don't think it is related to CPU_IDLE. SYSRQ-T that Thomas asked should give more clues.
Thanks, Venki
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