Messages in this thread | | | From | "Marco Tralli" <> | Subject | kernel 2.6.23-rc6 hangs on Geode GX1 | Date | Thu, 27 Sep 2007 16:44:22 +0200 |
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Hello all,
I have random hangs on kernel boot or after few minutes on a NatSemi Geode GX1 based PC-104 (from Advantech) using kernel 2.6.23-rc6. The system locks, no way to use SysRq key, no usefull logs.
No problems using kernel 2.6.21 series that I was using before with same config options.
I found that commenting out "geode_configure" call in arch/i386/kernel/cpu/cyrix.c the problem is fixed.
I guess recent changes to cyrix.c that replace macros setCx86/getCx86 with inlined functions have now "activate" performance tricks in geode_configure code that previously were "inactive" due to wrong macro espansion. So not only "Suspend on Halt" function is enabled but also less or not documented geode tricks (incrementor margin, fast fpu, write-back) now broken on some GX1/GXm platform (maybe because of BIOS?)
I can further investigate on what exact geode_configure part cause my hangs, but I suggest to make a config options to explicity enable Geode performance tricks only if requested (maybe using CONFIG_MGEODEGX1) .
Regards Marco Tralli Snap-on Equipment
processor : 0 vendor_id : CyrixInstead cpu family : 5 model : 9 model name : Geode(TM) Integrated Processor by National Semi stepping : 2 cpu MHz : 299.239 cache size : 16 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 2 wp : yes flags : fpu tsc msr cx8 cmov mmx cxmmx bogomips : 596.37
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