Date: Fri, 22 Oct 2010 11:53:32 +0300 From: Andriy Gapon <avg@freebsd.org> To: volker@vwsoft.com Cc: FreeBSD current <current@freebsd.org> Subject: Re: c 213323 breaks Sony Vaio P11Z w/o acpi Message-ID: <4CC1510C.2020000@freebsd.org> In-Reply-To: <4CBD24FA.8040302@icyb.net.ua> References: <4CBCCAB8.4090500@vwsoft.com> <4CBD24FA.8040302@icyb.net.ua>
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[ping] on 19/10/2010 07:56 Andriy Gapon said the following: > on 19/10/2010 01:31 volker@vwsoft.com said the following: >> Hi Andriy & list! >> >> Since rev 213323 my Sony Vaio P11Z was unable to boot up. It broke with a divide >> by zero in topo_probe_0x4 at line 289 as cpu_logical is 0. >> >> The cpu is an Intel Atom Z520 (single core). System doesn't boot at all w/ acpi >> enabled. >> >> The following patch made me to boot up again. >> >> Index: i386/i386/mp_machdep.c >> =================================================================== >> --- i386/i386/mp_machdep.c (revision 213936) >> +++ i386/i386/mp_machdep.c (working copy) >> @@ -286,7 +286,7 @@ >> cpu_logical++; >> } >> >> - cpu_cores /= cpu_logical; >> + cpu_cores /= cpu_logical==0?1:cpu_logical; >> hyperthreading_cpus = cpu_logical; >> } >> >> ``mptable -grope -verbose`` gives: >> =============================================================================== >> >> MPTable >> >> looking for EBDA pointer @ 0x040e, found, searching EBDA @ 0x0009fc00 >> searching CMOS 'top of mem' @ 0x0009f800 (638K) >> searching default 'top of mem' @ 0x0009fc00 (639K) >> searching BIOS @ 0x000f0000 >> searching extended BIOS @ 0x000e0000 >> groping memory @ 0x00080000 >> groping memory @ 0x00090000 >> >> MP FPS NOT found, >> suggest trying -grope option!!! >> >> so it's not of much help. >> >> relevant part of dmesg looks like: >> >> FreeBSD 9.0-CURRENT #3 r213904:213936M: Sat Oct 16 22:50:53 UTC 2010 >> root@juno.sz.vwsoft.com:/usr/obj/usr/src/sys/JUNO i386 >> CPU: Intel(R) Atom(TM) CPU Z520 @ 1.33GHz (1333.31-MHz 686-class CPU) >> Origin = "GenuineIntel" Id = 0x106c2 Family = 6 Model = 1c Stepping = 2 >> >> Features=0xbfe9fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE> >> >> >> Features2=0x40c3bd<SSE3,DTES64,MON,DS_CPL,VMX,EST,TM2,SSSE3,xTPR,PDCM,MOVBE> >> AMD Features=0x100000<NX> >> AMD Features2=0x1<LAHF> >> TSC: P-state invariant >> real memory = 2147483648 (2048 MB) >> avail memory = 2081042432 (1984 MB) >> >> I'm wondering if there's a better way to fix that problem or if someone wants to >> commit my fix. > > Definitely not - it violates style(9). > Kidding, of course :-) > > Could you please download and run the following script and send back output? > http://people.freebsd.org/~jkim/cpu_topology-12212009.sh > Thank you very much! -- Andriy Gapon
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