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    SubjectRe: [Bug #10872] x86_64 boot hang when CONFIG_NUMA=n
    On Mon, Jul 7, 2008 at 3:40 PM, Randy Dunlap <randy.dunlap@oracle.com> wrote:
    > On Mon, 7 Jul 2008 11:39:17 -0700 Randy Dunlap wrote:
    >
    >> On Mon, 7 Jul 2008 08:32:18 +0200 Ingo Molnar wrote:
    >>
    >> >
    >> > * Linus Torvalds <torvalds@linux-foundation.org> wrote:
    >> >
    >> > > > This still happens with 2.6.26-rc9. Using CONFIG_NUMA=y boots OK.
    >> > >
    >> > > Ok, then it wasn't the nr_zones thing.
    >> > >
    >> > > Since it seems to be repeatable for you, can you bisect it?
    >> >
    >> > one guess would be:
    >> >
    >> > | commit e8ee6f0ae5cd860e8e6c02807edfa3c1fa01bcb5
    >> > | Author: Yinghai Lu <yhlu.kernel@gmail.com>
    >> > | Date: Sun Apr 13 01:41:58 2008 -0700
    >> > |
    >> > | x86: work around io allocation overlap of HT links
    >> >
    >> > but ... since CONFIG_NUMA makes it work, i'm not sure about that.
    >> >
    >> > Randy, could you post the full CONFIG_NUMA bootlog as well, does it show
    >> > any difference in resource allocations?
    >>
    >> Good and bad boot logs are attached. There are several differences, but I don't
    >> see any that are significant.
    >>
    >> I've started bisecting with:
    >>
    >> $ git bisect start
    >> $ git bisect bad v2.6.26-rc1
    >> $ git bisect good v2.6.25
    >>
    >> That's only about 1.29M lines of changes.
    >
    > git bisect and normal rebooting did not find a problem.
    >
    > I'll repeat this using kexec to boot the new kernel and see if that
    > locates any issues... since I normally use kexec to load/test new kernels
    > and that was how the failure occurred (occurs).
    >

    same NON-NUMA kernel kexec NON-NUMA kernel?

    or other kernel kexex it?

    YH


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