linux-kernel - Re: [patch] x86: Introduce BOOT_EFI and 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] [thread-next>] [day] [month] [year] [list]

Date:	Sat, 01 Mar 2014 18:07:18 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	"Li, Aubrey" <aubrey.li@...ux.intel.com>,
	Matthew Garrett <mjg59@...f.ucam.org>
CC:	"H. Peter Anvin" <hpa@...ux.intel.com>,
	"alan@...ux.intel.com" <alan@...ux.intel.com>,
	linux-kernel@...r.kernel.org, Len.Brown@...el.com,
	Adam Williamson <awilliam@...hat.com>
Subject: Re: [patch] x86: Introduce BOOT_EFI and BOOT_CF9 into the reboot
 sequence loop

On 03/01/2014 05:47 PM, Li, Aubrey wrote:
> 
> Since we are not able to make things worse, let's make it better. So
> Let's dig into this. For the machine hangs by CF9, it's known to work by
> KBD, right? For the machine hangs by BIOS, do you know which method will
> make reboot work?
> 

No.

> The answer will determine the sequence of the list. If BIOS hangs but
> either of ACPI/KBD/EFI/CF9 works, BIOS is behind of those ways. If BIOS
> hangs, no any other way can make it work. BIOS is still the last way.
> 
> If CF9 hangs while ACPI/KBD hangs as well, and BIOS happened to work(do
> we really have one?), the above list still doesn't make things worse,
> reboot=b and dmidecode table still work.

We obviously have been over this a number of times, and the sad thing is
that we have very limited information.  It is more complex than that,
even... I believe in some cases KBD works but it is slow, and so takes a
while.

	-hpa


--
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/