lkml.org 
[lkml]   [2006]   [Jun]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    From
    SubjectRe: NMI problems with Dell SMP Xeons
    Date
    "Brendan Trotter" (on Wed, 7 Jun 2006 15:18:57 +0000) wrote:
    >Hi,
    >
    >On 6/7/06, Keith Owens <kaos@sgi.com> wrote:
    >> This problem is not KDB specific, although that is where it was first
    >> noticed. Any code that sends a broadcast IPI 2 or an NMI IPI will
    >> crash these Dell boxes when there is a mismatch between the cpus known
    >> to the BIOS and the cpus known to the OS.
    >
    >I missed this (broadcast IPI 2 causing problems)...

    It turns out that there is an uncommented hack in x86_64's version of
    __prepare_ICR().

    case NMI_VECTOR:
    icr |= APIC_DM_NMI;
    break;

    That hack is not in i386, which means that IPI 2 does different things
    in i386 vs. x86_64 mode on the same hardware. I am still tracking down
    all the differences before doing a clean up patch that makes i386 and
    x86_64 behave the same.

    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2006-06-08 07:15    [W:0.024 / U:0.188 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site