linux-kernel - Re: 3.5-rc6 printk formatting problem during oom-kill.

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Message-ID: <20120712170242.GA11890@redhat.com>
Date:	Thu, 12 Jul 2012 13:02:42 -0400
From:	Dave Jones <davej@...hat.com>
To:	Kay Sievers <kay@...y.org>
Cc:	Linux Kernel <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Greg Kroah-Hartmann <greg@...ah.com>
Subject: Re: 3.5-rc6 printk formatting problem during oom-kill.

On Thu, Jul 12, 2012 at 06:47:57PM +0200, Kay Sievers wrote:
 
 > >  > > Also, I have no idea how the hell the 'Modules linked in:' line (9th line) ended up being printed /after/ the
 > >  > > module listing began (2nd line).
 > 
 > They do not belong together. The second line is just another call to
 > the same print_modules() done from:
 >     arch/x86/kernel/dumpstack_64.c :: show_regs()
 > 
 > While we already called print_modules() a few cycles earlier from:
 >    kernel/watchdog :: watchdog_timer_fn()

ah, derp. Good spotting.
 
 > Hmm, it does not trigger your pattern. I tried adding an rmmod in that
 > loop, but that crashes after a few seconds. Some modules are just not
 > meant to be removed. :)

yeah, that's bothersome. TTBOMK, we've never survived a 'load all modules/unload all modules' ever.
 
 > I forced the watchdog to trigger by setting the timeout to 1s, but all
 > looks still fine:
 > 
 > Could it possibly be that we get some sort of corruption somewhere
 > else while running trinity and load modules?

I suppose anything is possible, but it's surprisingly consistent.

	Dave
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