From: Vivek Goyal <vgoyal-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
To: Dave Young <dyoung-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Cc: "Fleming,
Matt" <matt.fleming-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
"bp-Gina5bIWoIWzQB+pC5nmwQ@public.gmane.org"
<bp-Gina5bIWoIWzQB+pC5nmwQ@public.gmane.org>,
"linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"linux-efi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-efi-u79uwXL29TY76Z2rM5mHXA@public.gmane.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.GB2820-4/PLUo9XfK+sDdueE5tM26fLeoKvNuZc@public.gmane.org>
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
WARNING: multiple messages have this Message-ID (diff)
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
next prev parent reply other threads:[~2014-05-28 14:51 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-26 8:39 [PATCH] export efi.flags to sysfs Dave Young
2014-05-26 8:39 ` Dave Young
[not found] ` <20140526083935.GA19682-je1gSBvt1Tc/CGXRbJeUwh/sF2h8X+2i0E9HWUfgJXw@public.gmane.org>
2014-05-27 3:00 ` Dave Young
2014-05-27 3:00 ` Dave Young
[not found] ` <20140527030058.GB2372-4/PLUo9XfK+sDdueE5tM26fLeoKvNuZc@public.gmane.org>
2014-05-27 13:36 ` Fleming, Matt
2014-05-27 13:36 ` Fleming, Matt
[not found] ` <CAL01qpvqa-8u2MZ=8wE8gsiprFLbN4U3AbEX9+h7FuemXNR93Q-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-05-28 2:09 ` Dave Young
2014-05-28 2:09 ` Dave Young
2014-05-28 9:47 ` Dave Young
2014-05-28 15:51 ` Alex Thorlton
[not found] ` <20140528155104.GW10771-sJ/iWh9BUns@public.gmane.org>
2014-05-28 19:04 ` Vivek Goyal
2014-05-28 19:04 ` Vivek Goyal
2014-05-28 20:11 ` Alex Thorlton
[not found] ` <20140528190400.GR14863-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2014-05-29 11:58 ` Fleming, Matt
2014-05-29 11:58 ` Fleming, Matt
2014-05-29 2:37 ` Dave Young
2014-05-29 2:37 ` Dave Young
[not found] ` <20140528020935.GB2820-4/PLUo9XfK+sDdueE5tM26fLeoKvNuZc@public.gmane.org>
2014-05-28 14:51 ` Vivek Goyal [this message]
2014-05-28 14:51 ` Vivek Goyal
[not found] ` <20140528145140.GN14863-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2014-05-29 11:53 ` Fleming, Matt
2014-05-29 11:53 ` Fleming, Matt
[not found] ` <CAL01qpsb5_Gh31uqm7yB6HP2rKQkhFWWTu+U4JAR54XR5bfbZw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-05-29 12:59 ` Vivek Goyal
2014-05-29 12:59 ` Vivek Goyal
[not found] ` <20140529125910.GE14570-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2014-05-29 13:10 ` Fleming, Matt
2014-05-29 13:10 ` Fleming, Matt
[not found] ` <CAL01qpuNS0u89gaR9pCKUoCVRkADhPO4mZueEyK8nP84=OfDaA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-05-30 1:53 ` Dave Young
2014-05-30 1:53 ` Dave Young
2014-05-27 13:34 ` Vivek Goyal
2014-05-27 13:34 ` Vivek Goyal
[not found] ` <20140527133411.GG10994-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2014-05-28 2:13 ` Dave Young
2014-05-28 2:13 ` Dave Young
[not found] ` <20140528021359.GC2820-4/PLUo9XfK+sDdueE5tM26fLeoKvNuZc@public.gmane.org>
2014-05-28 12:40 ` Vivek Goyal
2014-05-28 12:40 ` Vivek Goyal
[not found] ` <20140528124029.GF14863-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2014-05-29 2:08 ` Dave Young
2014-05-29 2:08 ` Dave Young
2014-05-29 9:09 ` Dave Young
[not found] ` <20140529020837.GB2068-4/PLUo9XfK+sDdueE5tM26fLeoKvNuZc@public.gmane.org>
2014-05-29 12:45 ` Vivek Goyal
2014-05-29 12:45 ` Vivek Goyal
[not found] ` <20140529124520.GC14570-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2014-05-29 12:50 ` Borislav Petkov
2014-05-29 12:50 ` Borislav Petkov
2014-05-30 2:24 ` Dave Young
2014-05-30 2:24 ` Dave Young
[not found] ` <20140530022438.GC1985-4/PLUo9XfK+sDdueE5tM26fLeoKvNuZc@public.gmane.org>
2014-05-30 7:33 ` Borislav Petkov
2014-05-30 7:33 ` Borislav Petkov
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