From: Ingo Molnar <mingo@kernel.org>
To: Jan Beulich <JBeulich@suse.com>
Cc: Matt Fleming <matt@console-pimps.org>,
Matthew Garrett <mjg59@srcf.ucam.org>,
Matt Fleming <matt.fleming@intel.com>,
x86@kernel.org, Thomas Gleixner <tglx@linutronix.de>,
Dan Carpenter <dan.carpenter@oracle.com>,
Ingo Molnar <mingo@redhat.com>, Nathan Zimmer <nzimmer@sgi.com>,
kernel-janitors@vger.kernel.org, linux-efi@vger.kernel.org,
"H. Peter Anvin" <hpa@zytor.com>
Subject: Re: [patch] x86/efi: use GFP_ATOMIC under spin_lock
Date: Mon, 10 Mar 2014 08:37:53 +0100 [thread overview]
Message-ID: <20140310073753.GA4658@gmail.com> (raw)
In-Reply-To: <531D7786020000780012230D@nat28.tlf.novell.com>
* Jan Beulich <JBeulich@suse.com> wrote:
> >>> On 09.03.14 at 19:50, Matt Fleming <matt@console-pimps.org> wrote:
> > On Sun, 09 Mar, at 04:31:41PM, Matthew Garrett wrote:
> >> On Sun, Mar 09, 2014 at 04:20:20PM +0000, Matt Fleming wrote:
> >>
> >> > We have tried to use the time functions before, with little success
> >> > because of various bugs in the runtime implementations, e.g. see commit
> >> > bacef661acdb ("x86-64/efi: Use EFI to deal with platform wall clock")
> >> > and commit bd52276fa1d4 ("x86-64/efi: Use EFI to deal with platform wall
> >> > clock (again)").
> >>
> >> I'd naively expected that these would be more reliable after the
> >> 1:1 mapping patches, so it might actually be time to give them
> >> another go.
> >
> > Is there any value in that? Do machines exist where we absolutely
> > must have access to the EFI time services? Either because there's
> > no other method or no other working one?
>
> Is it such a bad thing to be prepared for this sort of machine to
> arrive even if likely there are none so far?
"Be prepared for a not yet existing machine" != "time to give them
another go on existing machines", right?
Thanks,
Ingo
next prev parent reply other threads:[~2014-03-10 7:37 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-07 11:20 [patch] x86/efi: use GFP_ATOMIC under spin_lock Dan Carpenter
[not found] ` <20140307112055.GE2351-mgFCXtclrQlZLf2FXnZxJA@public.gmane.org>
2014-03-07 12:10 ` Ingo Molnar
[not found] ` <20140307121022.GA32575-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2014-03-07 12:25 ` Dan Carpenter
2014-03-09 6:48 ` Ingo Molnar
2014-03-09 7:14 ` Dan Carpenter
2014-03-09 16:20 ` Matt Fleming
2014-03-09 16:31 ` Matthew Garrett
[not found] ` <20140309163141.GA18824-1xO5oi07KQx4cg9Nei1l7Q@public.gmane.org>
2014-03-09 18:50 ` Matt Fleming
2014-03-09 19:00 ` Matthew Garrett
[not found] ` <20140309190053.GA29555-1xO5oi07KQx4cg9Nei1l7Q@public.gmane.org>
2014-03-10 9:10 ` Matt Fleming
[not found] ` <20140309185028.GB10262-HNK1S37rvNbeXh+fF434Mdi2O/JbrIOy@public.gmane.org>
2014-03-10 7:27 ` Jan Beulich
2014-03-10 7:37 ` Ingo Molnar [this message]
2014-03-10 7:45 ` Jan Beulich
2014-03-10 7:53 ` Ingo Molnar
2014-03-10 8:22 ` Jan Beulich
2014-03-10 10:43 ` Matt Fleming
[not found] ` <20140310104328.GG10262-HNK1S37rvNbeXh+fF434Mdi2O/JbrIOy@public.gmane.org>
2014-03-10 11:05 ` Jan Beulich
[not found] ` <531DAA7602000078001224EF-ce6RLXgGx+vWGUEhTRrCg1aTQe2KTcn/@public.gmane.org>
2014-03-10 16:10 ` Matt Fleming
2014-03-14 23:02 ` Matt Fleming
2014-03-10 9:12 ` Matt Fleming
2014-03-10 7:26 ` Jan Beulich
2014-03-10 17:07 ` Dan Carpenter
2014-03-09 7:36 ` Dan Carpenter
2014-03-10 16:47 ` H. Peter Anvin
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