linux-kernel - Re: 2.6.21-rc7-mm2 hangs in boot (netconsole)

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Message-Id: <20070501102632.abfc3323.randy.dunlap@oracle.com>
Date:	Tue, 1 May 2007 10:26:32 -0700
From:	Randy Dunlap <randy.dunlap@...cle.com>
To:	Randy Dunlap <randy.dunlap@...cle.com>
Cc:	Andi Kleen <ak@...e.de>, Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: 2.6.21-rc7-mm2 hangs in boot (netconsole)

On Tue, 1 May 2007 09:22:33 -0700 Randy Dunlap wrote:

> On Tue, 1 May 2007 08:22:58 +0200 Andi Kleen wrote:
> 
> > On Mon, Apr 30, 2007 at 10:16:24PM -0700, Randy Dunlap wrote:
> > > On Tue, 1 May 2007 05:43:30 +0200 Andi Kleen wrote:
> > > 
> > > > > Andi: unprocessor x86_64 running rc7-mm2 is hanging early in boot at
> > > > > randomish times (presumably in the timer irq handler) when netconsole and
> > > > > printk-time are enabled.
> > > > 
> > > > A backtrace would be good. Does nmi_watchdog=2 show anything
> > > > interesting or if not sysrq-t?
> > > 
> > > I can't get anything from sysrq or nmi_watchdog.
> > 
> > Hmm, ok when the console locks up those likely don't work.
> > 
> > > 
> > > > > I was hitting the same thing on i386 uniprocessor, but I thought it got
> > > > > fixed.
> > > > 
> > > > Yes.
> > > 
> > > Fixed where?  Merged into mainline or in your firstfloor patches?
> > 
> > None of the sched-clock changes are in mainline yet.
> > 
> > Can you perhaps test latest firstfloor alone (without rest of -mm)?
> 
> OK.  so your 2.6.21-rc7-git5 patch, applied to 2.6.21-git4 or
> applied to 2.6.21-rc7-git5 ?

Applied cleanly to 2.6.21-rc7-git5, but it has build errors:


arch/x86_64/mm/built-in.o: In function `mark_rodata_ro':
(.text+0x180): undefined reference to `_stext'
arch/x86_64/mm/built-in.o: In function `mem_init':
(.init.text+0x2cf): undefined reference to `_stext'
arch/x86_64/mm/built-in.o: In function `do_page_fault':
(.kprobes.text+0x59c): undefined reference to `_stext'
arch/x86_64/vdso/built-in.o: In function `arch_setup_additional_pages':
(.text+0x40): undefined reference to `vdso_end'
arch/x86_64/vdso/built-in.o: In function `arch_setup_additional_pages':
(.text+0x58): undefined reference to `vdso_start'
arch/x86_64/vdso/built-in.o: In function `init_vdso_vars':
vma.c:(.init.text+0x1b): undefined reference to `vdso_end'
vma.c:(.init.text+0x26): undefined reference to `vdso_start'
vma.c:(.init.text+0x3c): undefined reference to `vdso_start'
kernel/built-in.o: In function `profile_hits':
(.text+0x9609): undefined reference to `_stext'
kernel/built-in.o: In function `core_kernel_text':
(.text+0x197c4): undefined reference to `_stext'
kernel/built-in.o: In function `is_ksym_addr':
kallsyms.c:(.text+0x27042): undefined reference to `_stext'
kernel/built-in.o: In function `profile_init':
(.init.text+0xc57): undefined reference to `_stext'
make: *** [.tmp_vmlinux1] Error 1

---
~Randy
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