linux-kernel - Re: HPET regression in 2.6.26 versus 2.6.25

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-Id: <1217944733.3589.120.camel@twins>
Date:	Tue, 05 Aug 2008 15:58:53 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	David Witbrodt <dawitbro@...global.net>
Cc:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Yinghai Lu <yhlu.kernel@...il.com>
Subject: Re: HPET regression in 2.6.26 versus 2.6.25

[ Let's CC people, so that they'll at least see this mail
  when they're back from holidays ]

On Mon, 2008-08-04 at 16:57 -0700, David Witbrodt wrote:
> Hello,
> 
> [Please CC me if you reply, for I am not subscribed to LKML.]
> 
> This is my first time posting to LKML.
> 
> I am a Debian user.  The sources for 2.6.26 recently became available
> in the Debian unstable repositories.  Trying them out by building
> custom kernels (think 'make oldconfig'), I found that one machine 
> worked while another froze early in boot.  No oops, no error msg of
> any kind, just a hard freeze without even Magic SysRq working!
> 
> I suspected a dumb config error on my part, but found that the Debian
> stock kernel exhibited the same problem.  So I filed a bug report in
> the Debian BTS:
> 
> http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=493479
> 
> There is much info about my hardware and configs there, but I can
> repost them here if that is helpful.  The machine that works with
> 2.6.26 has a Gigabyte GA-M59SLI-S5 mboard; the broken machine has an
> ECS AMD690GM-M2 mboard.
> 
> After much experimenting with various configs and rebuilds, I was
> finally able to discover that a kernel boot parameter,
> "hpet=disabled", allowed me to boot on the troublesome machine.  
> Both custom and Debian stock kernels of version 2.6.25 (most recently
> based on 2.6.25.10) work fine on this machine, no problem with HPET.
> 
> A member of the Debian kernel team (Bastian Blank) tried to help, but
> ended up suggesting bisecting using 'git'.  I am not (yet) a developer
> so I was not really thinking of getting that deeply involved, but I
> spent so much time trying to track this problem on Saturday night and
> all day Sunday, that I decided to give it a try!
> 
> Starting with Linus' instructions here,
>   http://lkml.org/lkml/2007/7/10/248
> 
> I ran: 
>   git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
> 
> and:
>   git checkout v2.6.25


Since you have that git tree, could you try to see if the latest -git
still has this problem?

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/