linux-kernel - Re: Linux 2.6.25-rc4

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Date:	Fri, 7 Mar 2008 10:02:57 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Jens Axboe <jens.axboe@...cle.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: Linux 2.6.25-rc4


* Jens Axboe <jens.axboe@...cle.com> wrote:

> > no luck - a few hundred successful randconfig bootups overnight 
> > (with a rather complex userspace startup to full X plus networking, 
> > and the testbox is used via the network to compile the next random 
> > kernel as well - etc.) and no failure at all. So there's not much we 
> > can do at this point - i'll keep you updated if anything new happens 
> > in the tests.
> 
> OK, so it could possibly be something else or perhaps something that's 
> existed for a long time.
> 
> To capture vital debugging information for cases like this, I had an 
> idea for a sysrq key that would dump queue and io scheduler info for 
> all known block devices. That should help pin point where the problem 
> lies. If we have any letters left in the sysrq namespace :-)

btw., we should reserve one sysrq letter as a "meta" character. If that 
letter is 'X' [for Xtended SysRq] then SysRq-X SysRq-B could dump the 
block info.

	Ingo
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