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    SubjectRe: [BUG] (regression) AMD k6-III/450 won't boot w/2.6.22-rc1
    Date
    From
    Dave Jones wrote:
    > On Wed, May 16, 2007 at 11:53:22AM -0400, Chuck Ebbert wrote:
    > > Bob Tracy wrote:
    > > > Jan Engelhardt wrote:
    > > >>> On Tue, 15 May 2007 22:13:14 -0500 (CDT) Bob Tracy wrote:
    > > >>>> The 2.6.22-rc1 boot panics early in amd_mcheck_init() with my k6-III/450.
    > >
    > > > Intel machine check architecture supported.
    > > > general protection fault: 0000 [#1]
    > > > PREEMPT
    > > > Modules linked in:
    > > > CPU: 0
    > > > EIP: 0060:[<c01079f4>] Not tainted VLI
    > > > EFLAGS: 00010286 (2.6.22-rc1 #1)
    > > > EIP is at amd_mcheck_init+0x2b/0xc3
    > > >
    > >
    > > rdmsr with ecx == 0x179 (Machine Check Global Capabilities Register)
    > >
    > > Probably K6 doesn't have that.
    >
    > sounds right. Intel style MCE capability was introduced with the Athlon
    > on AMD systems iirc.
    >
    > > Caused by:
    > >
    > > [PATCH] i386: check capability
    >
    > Though this would imply that Bobs K6-3 is reporting that it does have
    > that bit in its cpuid flags.
    >
    > Bob, can you send your /proc/cpuinfo and dmesg |grep CPU ?

    /proc/cpuinfo sent in the first message in this thread (anticipated your
    request :-)), but it's small enough to repeat:

    processor : 0
    vendor_id : AuthenticAMD
    cpu family : 5
    model : 9
    model name : AMD-K6(tm) 3D+ Processor
    stepping : 1
    cpu MHz : 451.040
    cache size : 256 KB
    fdiv_bug : no
    hlt_bug : no
    f00f_bug : no
    coma_bug : no
    fpu : yes
    fpu_exception : yes
    cpuid level : 1
    wp : yes
    flags : fpu vme de pse tsc msr mce cx8 pge mmx syscall 3dnow k6_mtrr
    bogomips : 902.78
    clflush size : 32

    Here's the requested dmesg output (for 2.6.21):

    Initializing CPU#0
    CPU: After generic identify, caps: 008021bf 808029bf 00000000 00000000 00000000 00000000 00000000
    CPU: L1 I Cache: 32K (32 bytes/line), D cache 32K (32 bytes/line)
    CPU: L2 Cache: 256K (32 bytes/line)
    CPU: After all inits, caps: 008021bf 808029bf 00000000 00000002 00000000 00000000 00000000
    CPU: AMD-K6(tm) 3D+ Processor stepping 01
    NVRM: CPU does not support the PAT, falling back to MTRRs.

    --
    -----------------------------------------------------------------------
    Bob Tracy WTO + WIPO = DMCA? http://www.anti-dmca.org
    rct@frus.com
    -----------------------------------------------------------------------
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