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SubjectRe: [Bug 10872] x86_64 boot hang when CONFIG_NUMA=n
On Sun, 15 Jun 2008 12:18:42 -0700 Yinghai Lu wrote:

> On Sun, Jun 15, 2008 at 9:35 AM, Randy Dunlap <randy.dunlap@oracle.com> wrote:
> > On Sat, 14 Jun 2008 22:12:04 +0200 (CEST) Rafael J. Wysocki wrote:
> >
> >> This message has been generated automatically as a part of a report
> >> of recent regressions.
> >>
> >> The following bug entry is on the current list of known regressions
> >> from 2.6.25. Please verify if it still should be listed.
> >>
> >>
> >> Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=10872
> >> Subject : x86_64 boot hang when CONFIG_NUMA=n
> >> Submitter : Randy Dunlap <randy.dunlap@oracle.com>
> >> Date : 2008-06-05 21:50 (10 days old)
> >> References : http://marc.info/?l=linux-kernel&m=121270308607116&w=4
> >> http://lkml.org/lkml/2008/6/11/355
> >> Handled-By : Yinghai Lu <yhlu.kernel@gmail.com>
> >
> > Yes, still happens for me on 2.6.26-rc6-git2.
> >
>
> please send out whole boot log with numa on and numa off
> and boot with debug
>
> please apply attached debug patch too.

OK, did all of that.
I should probably note that in both cases, the kernel is loaded/booted by using kexec.
Both boot logs are captured generated via netconsole.

The failing boot log is netcon-4409.log. The working boot log (CONFIG_NUMA=y) is
netcon-4410.log. Enabling CONFIG_NUMA makes the following changes:

4c4
< # Sun Jun 15 15:00:56 2008
---
> # Sun Jun 15 15:10:15 2008
241c241,246
< # CONFIG_NUMA is not set
---
> CONFIG_NUMA=y
> CONFIG_K8_NUMA=y
> CONFIG_X86_64_ACPI_NUMA=y
> CONFIG_NODES_SPAN_OTHER_NODES=y
> # CONFIG_NUMA_EMU is not set
> CONFIG_NODES_SHIFT=6
249a255
> CONFIG_NEED_MULTIPLE_NODES=y
260a267
> CONFIG_MIGRATION=y
282a290
> CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID=y
309a318
> CONFIG_ACPI_NUMA=y


Thanks,
---
~Randy
'"Daemon' is an old piece of jargon from the UNIX operating system,
where it referred to a piece of low-level utility software, a
fundamental part of the operating system."
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