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From: Vivek Goyal <vgoyal@redhat.com>
To: Dave Young <dyoung@redhat.com>
Cc: "Fleming, Matt" <matt.fleming@intel.com>,
	"bp@alien8.de" <bp@alien8.de>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"linux-efi@vger.kernel.org" <linux-efi@vger.kernel.org>
Subject: Re: [PATCH] export efi.flags to sysfs
Date: Wed, 28 May 2014 10:51:40 -0400	[thread overview]
Message-ID: <20140528145140.GN14863@redhat.com> (raw)
In-Reply-To: <20140528020935.GB2820@darkstar.nay.redhat.com>

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

  parent reply	other threads:[~2014-05-28 14:51 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-05-26  8:39 [PATCH] export efi.flags to sysfs Dave Young
2014-05-27  3:00 ` Dave Young
2014-05-27 13:36   ` Fleming, Matt
2014-05-28  2:09     ` Dave Young
2014-05-28  9:47       ` Dave Young
2014-05-28 15:51         ` Alex Thorlton
2014-05-28 19:04           ` Vivek Goyal
2014-05-28 20:11             ` Alex Thorlton
2014-05-29 11:58             ` Fleming, Matt
2014-05-29  2:37           ` Dave Young
2014-05-28 14:51       ` Vivek Goyal [this message]
2014-05-29 11:53         ` Fleming, Matt
2014-05-29 12:59           ` Vivek Goyal
2014-05-29 13:10             ` Fleming, Matt
2014-05-30  1:53               ` Dave Young
2014-05-27 13:34 ` Vivek Goyal
2014-05-28  2:13   ` Dave Young
2014-05-28 12:40     ` Vivek Goyal
2014-05-29  2:08       ` Dave Young
2014-05-29  9:09         ` Dave Young
2014-05-29 12:45         ` Vivek Goyal
2014-05-29 12:50           ` Borislav Petkov
2014-05-30  2:24           ` Dave Young
2014-05-30  7:33             ` Borislav Petkov

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