Re: [Fastboot] Re: [PATCH & RFC] kdump and stack overflows

From: Eric W. Biederman (ebiederm_at_xmission.com)
Date: 11/29/05

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    To: vgoyal@in.ibm.com
Date:	Tue, 29 Nov 2005 09:46:21 -0700

    Vivek Goyal <vgoyal@in.ibm.com> writes:

    > On Mon, Nov 28, 2005 at 11:29:29AM -0700, Eric W. Biederman wrote:
    >> (baring
    >> nmi happening during nmis) Hmm. Is there anything to keep
    >> us doing something bad in that case?
    >>
    >> I guess as long as we don't clear the high bit of port 0x70 we
    >> should be reasonably safe from the nmi firing multiple times.
    >
    > Are you referring to port 0x23 for IMCR register.

    No. Port 0x70 is the cmos address register. 0x71 the cmos
    data register. The high bit of 0x70 if the nmi enable.

    Although with local apics generating nmis I would be surprised
    if it effective in every case. :)

    Eric

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  • Next message: Hugh Dickins: "[PATCH 1/4] pfnmap: fix 2.6.15-rc3 driver breakage"