linux-kernel - Re: [BUG FIX] Make x86_32 uni-processor Atomic ops, Atomic

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: Windows password security audit tool. GUI, reports in PDF.

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

Date:	Sat, 23 May 2009 16:44:08 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Harald Welte <HaraldWelte@...tech.com>
CC:	lkml@...ethan.org, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel@...r.kernel.org, Alan Cox <alan@...rguk.ukuu.org.uk>
Subject: Re: [BUG FIX] Make x86_32 uni-processor Atomic ops, Atomic

Hi Harald,

It looks like there might be a problem with the C7-M ... Michael reports
that if he sets LOCK_PREFIX to "lock;" it works, but that shouldn't be
necessary for a uniprocessor.

I'm wondering if we have to revive the OOSTORE hack, or some other
workaround.  It is of course hard for me to track this down since (a) I
don't have access to the CPU documentation, and (b) I work for Intel
now, which limits the amount of time I can realistically spend on this.

	-hpa

[Cc: Alan, who I believed developed the OOSTORE hack back when.]


Michael S. Zick wrote:
> On Fri May 22 2009, H. Peter Anvin wrote:
>> Michael S. Zick wrote:
>>> Same integrated motherboard.
>> Which means same CPU, same BIOS, same motherboard (none of which you're
>> telling us.)
>>
>> cpuinfo and dmidecode would be informative.
>>
> 
> The -09143lk files are posted.
> 
> Download location:
> http://hp-umpc.com/ce1200v
> 
> Details so far today:
> http://forum.netbookuser.com/viewtopic.php?pid=6968#p6968
> 
> Summary:
> HP-2133 (C7-M/CN896) - 09143 - No results - Still up 3 1/2 hours.
> Cloudbook (C7-M/CX700) - 09143 - 45 minutes.
> Cloudbook (C7-M/CX700) - 09143lk - No results - Still up 1 1/2 hours.
> 
> OK - time to look for the missing "memory" in the clobber lists.  ;)
> 

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

--
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/