linux-kernel - Re: [PATCH][RFC] exception processing in early boot

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] [day] [month] [year] [list]

Date:	Wed, 30 Aug 2006 13:15:07 -0400
From:	"linux-os \(Dick Johnson\)" <linux-os@...logic.com>
To:	"Andi Kleen" <ak@...e.de>
Cc:	<pageexec@...email.hu>, "Willy Tarreau" <w@....eu>,
	<Riley@...liams.name>, <davej@...hat.com>,
	"Linux kernel" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH][RFC] exception processing in early boot

On Wed, 30 Aug 2006, Andi Kleen wrote:

>
>> Even the i286 and the 8086 support hlt. Is there some Cyrix chip that
>> you are trying to preserve? I think even those all implimented
>> hlt as well.
>
>
> According to the kernel code it's
>
> char    hlt_works_ok;   /* Problems on some 486Dx4's and old 386's */
>
> I don't know more details about what these problems were.
>
> -Andi
>

Oh yes. There were some buggy chips that would not let an interrupt
take the CPU out of hlt! However, what's wanted here is a hard-stop
which you get even with buggy chips because an interrupt won't
awaken them.

Cheers,
Dick Johnson
Penguin : Linux version 2.6.16.24 on an i686 machine (5592.62 BogoMips).
New book: http://www.AbominableFirebug.com/
_
..

****************************************************************
The information transmitted in this message is confidential and may be privileged.  Any review, retransmission, dissemination, or other use of this information by persons or entities other than the intended recipient is prohibited.  If you are not the intended recipient, please notify Analogic Corporation immediately - by replying to this message or by sending an email to DeliveryErrors@...logic.com - and destroy all copies of this information, including any attachments, without reading or disclosing them.

Thank you.
-
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/