linux-kernel - Re: [PATCH] export efi.flags to sysfs

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:	Wed, 28 May 2014 10:51:40 -0400
From:	Vivek Goyal <vgoyal@...hat.com>
To:	Dave Young <dyoung@...hat.com>
Cc:	"Fleming, Matt" <matt.fleming@...el.com>,
	"bp@...en8.de" <bp@...en8.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-efi@...r.kernel.org" <linux-efi@...r.kernel.org>
Subject: Re: [PATCH] export efi.flags to sysfs

On Wed, May 28, 2014 at 10:09:35AM +0800, Dave Young wrote:

[..]
> > I've only vaguely been following along with the other thread, so please
> > summarise everything again in your patch. Particularly, I need answers
> > to the following questions,
> > 
> >  - Are you trying to fix a kexec/kdump regression?
> 
> Somehow it is a regression.

Well, it is a *regression*. Previously kdump would work with
SGI UV machines as it used "noefi". Now kexec by default thinks that
efi is enabled and 1:1 mappings are in place and that does not work
with SGI UV machines.

So just providing --noefi is not enough. Somebody needs to automatically
figure out that this SGI machine does not contain 1:1 mapping and hence
need to fall back to old mode. --noefi is good for override.

Thanks
Vivek
--
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/