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:	Thu, 28 May 2009 08:29:13 -0500
From:	"Michael S. Zick" <lkml@...ethan.org>
To:	Pavel Machek <pavel@....cz>
Cc:	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel@...r.kernel.org
Subject: Re: [BUG FIX] Make x86_32 uni-processor Atomic ops, Atomic

On Thu May 28 2009, Pavel Machek wrote:
> Hi!
> 
> > The observation that executing an unnecessary 'lock' opcode in some
> > cases slows down the machine is not felt by myself to be significant 
> > to duplicating my observations.  Note: I have been wrong before.
> > 
> > This is as informative as I can make the message.
> > 
> > PS: *not* a single machine failure, tested on five machines, owned
> > by four different people, two brands, with different use histories.
> 
> I have seen some problems on via c7m based machines, where some 'smart
> bios person' implemented EC access in AML (normally, it is accessed
> from ec.c driver). Maybe you have similary bad bios?
> 

How to tell or distingush?
Did your looking at the dmidecode output show you that?

Mike
--
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/