linux-kernel - Re: reason for delay in arch/x86/kernel/traps.c::io_check

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]

Message-ID: <20090310034939.GC11935@one.firstfloor.org>
Date:	Tue, 10 Mar 2009 04:49:39 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Chris Friesen <cfriesen@...tel.com>
Cc:	linux-kernel@...r.kernel.org, Andi Kleen <andi@...stfloor.org>,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: reason for delay in arch/x86/kernel/traps.c::io_check_error()?

On Mon, Mar 09, 2009 at 01:33:44PM -0600, Chris Friesen wrote:
> 
> Hi all,
> 
> I was just wondering about the basis for the delay in io_check_error(). 
>  The ICH7 manual doesn't have any mention of a delay being required 
> here--is it necessary for other hardware, something not mentioned in the 
> manual, or just an accident?

The complete NMI error logging handling does not really apply to any modern 
chipset; it's for ancient hardware (286, 386 generation). Those often
needed strange delays too.

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only.
--
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/