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    SubjectRe: [PATCH] [arch-x86] Allow SRAT integrity check to be skipped
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    On Tue, 2010-09-07 at 13:03 -0700, H. Peter Anvin wrote:
    > On 09/07/2010 12:38 PM, Peter P Waskiewicz Jr wrote:
    > >
    > > It's one SKU of a Nehalem-EX system. The BIOS for that SKU has an issue
    > > with resolving SRAT hotplug enumeration, and screws up the table. Other
    > > SKU's of this same platform do not have the issue. Efforts are underway
    > > to get this BIOS fixed, but in the meantime, there's nothing for users
    > > to work around the bug (aside from disabling memory hotplug in the
    > > BIOS). Another platform almost shipped with the same symptoms, but
    > > caught it and had it fixed before it shipped (didn't catch it early
    > > because Windows wasn't failing, and most of the testing on that platform
    > > was done under Windows).
    > >
    > > I agree with Andi that adding DMI strings would be overkill and would
    > > leave clutter once the BIOS is fixed. I look at this patch as a
    > > stop-gap measure for people to fall back on until a newer BIOS is
    > > available to correct the NUMA enumeration issues. Without it, we have
    > > nothing to point users to when they run into this, waiting for a new
    > > BIOS.
    > >
    >
    > No, this is exactly the kind of stuff for which a DMI match is ideal. A
    > specific system with bounded propagation of the problem. Thus, the DMI
    > match acts as a whitelist -- "we know this system and it is safe to
    > activate this hack on it." This is a very good thing.
    >
    > If this is a production BIOS it should have this information.

    Responding for both your and Ingo's last email, I'll work on getting a
    DMI match for this system.

    Thanks,
    -PJ
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