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    SubjectRe: 2.6.24 git2/mm1: cpu_to_node mapping to non-existant nodes causing boot failure
    On Wed, Feb 27, 2008 at 6:37 AM, Mike Travis <travis@sgi.com> wrote:
    >
    > Yinghai Lu wrote:
    > > On Tue, Feb 19, 2008 at 11:23 AM, Mel Gorman <mel@csn.ul.ie> wrote:
    > >> On (19/02/08 08:12), Mike Travis didst pronounce:
    > >>
    > >>> Mike Travis wrote:
    > >> > > Mel Gorman wrote:
    > >> > >
    > >> > >> If you send me patches to apply on top of 2.6.25-rc1, I'll give them a spin
    > >> > >> on the machine in question. Reverting didn't work out very well as there are
    > >> > >> too many collisions with patches that were applied later. I eventually got
    > >> > >> the machine booting but it only succeeds because it only brings up one core
    > >> > >> on each processor. The patch, which is pretty brain damaged is below in case
    > >> > >> it helps you guess what the real problem is. dmesg logs are attached of the
    > >> > >> vanilla failure with acpi=debug and the log with the patch applied showing
    > >> > >> "__cpu_up: bad cpu 1" and "__cpu_up: bad cpu3" (i.e. the second cores of
    > >> > >> each machine).
    > >> > >>
    > >> > >
    > >> > > This should completely undo the change to 16 bit apic ids until we can figure
    > >> > > out the problem with the memory-less nodes. I checked it on both the numa
    > >> > > and non-numa x86_64 box.
    > >> > >
    > >> > > Thanks,
    > >> > > Mike
    > >> > >
    > >> >
    > >> > Hi Mel,
    > >> >
    > >> > Did you get a chance to try out this patch to see if it cleared up the problem
    > >> > booting on your x86_64 numa box?
    > >
    > > did it fail with x86.git#testing?
    > >
    > > YH
    >
    > Hi,
    >
    > My problem is that I haven't been able to set up a NUMA box where some of the nodes
    > have no memory. The one box we have, the serial port doesn't work and it's in a lab
    > far, far away. Everything else, it works fine.

    x86.git#testing should be solid with numa and nodes without memory.

    YH


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