From: Vivek Goyal <vgoyal@redhat.com>
To: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: kexec@lists.infradead.org, James.Bottomley@HansenPartnership.com,
horms@verge.net.au, bp@alien8.de, ebiederm@xmission.com,
hpa@zytor.com, Dave Young <dyoung@redhat.com>,
kexec@lists.fedoraproject.org
Subject: Re: [patch 2/4] remove extra acpi_rsdp command line for efi
Date: Mon, 28 Oct 2013 12:10:40 -0400 [thread overview]
Message-ID: <20131028161040.GE1659@redhat.com> (raw)
In-Reply-To: <20131028105119.GA4822@srcf.ucam.org>
On Mon, Oct 28, 2013 at 10:51:19AM +0000, Matthew Garrett wrote:
> On Mon, Oct 28, 2013 at 06:45:32PM +0800, Dave Young wrote:
> > On 10/28/13 at 10:39am, Matthew Garrett wrote:
> > > On Mon, Oct 28, 2013 at 06:34:12PM +0800, Dave Young wrote:
> > > > On 10/28/13 at 10:12am, Matthew Garrett wrote:
> > > > > Right, but previously acpi_rsdp was passed automatically and now it
> > > > > won't be?
> > > >
> > > > Yes, it was. I'm removing them in kexec-tools patches for efi runtime support.
> > >
> > > If I upgrade kexec-tools and try to launch an old kernel, I now need to
> > > add an extra parameter?
> >
> > Yes, it should work by passing the acpi_rsdp= via --append
>
> Yes, that's my point. You're breaking old configurations by requiring
> the user to pass an additional argument.
Yes this is a problem. Of course solution is easy by always passing
acpi_rsdp on command line. But in long term this is a problem. In the
sense, I am not sure how to cleanup the kexec-tools code as things improve.
Now we will support the EFI properly and still pass acpi_rsdp always in
an effort to matain backward compatibility.
For a very long time kexec-tools were not automatically appending
acpi_rsdp and user were supposed to add it on command line. We were
carrying this change in kdump scripts and pushed this change into
kexec-tools. In hindsight, it looks like that hardcoding parameters
in kexec-tools is a bad idea. It is hard to get rid of them in future.
Thanks
Vivek
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next prev parent reply other threads:[~2013-10-28 16:11 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-27 4:04 [patch 0/4] kexec-tools: efi runtime support on kexec kernel dyoung
2013-10-27 4:04 ` [patch 1/4] Add function get_bootparam dyoung
2013-10-28 0:38 ` Simon Horman
2013-10-28 1:13 ` Dave Young
2013-10-28 2:30 ` Dave Young
2013-10-28 4:20 ` Simon Horman
2013-10-28 5:06 ` Dave Young
2013-10-28 6:08 ` Simon Horman
2013-10-27 4:04 ` [patch 2/4] remove extra acpi_rsdp command line for efi dyoung
2013-10-28 0:39 ` Simon Horman
2013-10-28 1:39 ` Dave Young
2013-10-28 9:42 ` Matthew Garrett
2013-10-28 9:54 ` Dave Young
2013-10-28 10:12 ` Matthew Garrett
2013-10-28 10:34 ` Dave Young
2013-10-28 10:39 ` Matthew Garrett
2013-10-28 10:45 ` Dave Young
2013-10-28 10:51 ` Matthew Garrett
2013-10-28 10:53 ` Dave Young
2013-10-29 3:05 ` Dave Young
2013-10-29 3:34 ` Dave Young
2013-10-29 8:50 ` Dave Young
2013-10-29 14:57 ` H. Peter Anvin
2013-10-28 16:10 ` Vivek Goyal [this message]
2013-10-29 2:04 ` Simon Horman
2013-10-29 2:36 ` Dave Young
2013-10-29 3:18 ` Dave Young
2013-10-30 0:45 ` Simon Horman
2013-10-29 13:27 ` Vivek Goyal
2013-10-27 4:04 ` [patch 3/4] Add efi_info in x86 setup header dyoung
2013-10-27 4:04 ` [patch 4/4] Passing efi related data via setup_data dyoung
2013-10-28 0:37 ` Simon Horman
2013-10-28 1:12 ` Dave Young
2013-10-28 3:02 ` Dave Young
2013-10-28 4:16 ` Simon Horman
2013-10-28 1:28 ` Dave Young
2013-10-28 10:41 ` H. Peter Anvin
2013-10-28 11:21 ` Dave Young
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