On Sun, 4 Oct 2009 12:20:59 +0000 (UTC) Konstantin Belousov <kib_at_FreeBSD.org> wrote: > Log: > MFC r197663: > As a workaround, for Intel CPUs, do not use CLFLUSH in > pmap_invalidate_cache_range() when self-snoop is apparently not reported > in cpu features. > > Approved by: re (bz, kensmith) I was tested r197663/r197744, but kernel panic again on Citrix Xen Server. using 8.0-RC1 install cd, results are 1. INTEL SU9400+HYPER-V(Windows2008 R2) -> boot OK. 2. AMD Athlon X2 TK-55+HYPER-V(Windows2008 R2) -> boot NG. 3. AMD PhenomII 940BK+Citrix Xen Server -> boot NG. I think INTEL CPUs are no problem, but AMD CPUs appear the problem. So I tested the following patch, kernel boot was successed on recent 9-CURRENT and environment 3. sorry, poor English. --- sys/i386/i386/initcpu.c.original 2009-10-01 21:52:48.000000000 +0900 +++ sys/i386/i386/initcpu.c 2009-10-05 08:29:45.000000000 +0900 _at__at_ -721,7 +721,7 _at__at_ * XXXKIB: (temporary) hack to work around traps generated when * CLFLUSHing APIC registers window. */ - if (cpu_vendor_id == CPU_VENDOR_INTEL && !(cpu_feature & CPUID_SS)) + if (cpu_vendor_id == CPU_VENDOR_AMD && !(cpu_feature & CPUID_SS)) cpu_feature &= ~CPUID_CLFSH; #if defined(PC98) && !defined(CPU_UPGRADE_HW_CACHE) -- Michio "Karl" Jinbo <michio.jinbo_at_gmail.com>Received on Mon Oct 05 2009 - 09:39:24 UTC
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