From: Matt Fleming <matt-HNK1S37rvNbeXh+fF434Mdi2O/JbrIOy@public.gmane.org>
To: "Luck, Tony" <tony.luck-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Cc: Matthew Garrett <mjg59-1xO5oi07KQx4cg9Nei1l7Q@public.gmane.org>,
"linux-efi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-efi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Andi Kleen <ak-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>,
Seiji Aguchi <seiji.aguchi-7rDLJAbr9SE@public.gmane.org>,
"x86-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org"
<x86-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
"Fleming,
Matt" <matt.fleming-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Subject: Re: [PATCH 5/5] efi: Capsule update support and pstore backend
Date: Thu, 17 Oct 2013 13:05:19 +0100 [thread overview]
Message-ID: <20131017120519.GF10834@console-pimps.org> (raw)
In-Reply-To: <3908561D78D1C84285E8C5FCA982C28F31D31122-P5GAC/sN6hlZtRGVdHMbwrfspsVTdybXVpNB7YpNyf8@public.gmane.org>
On Wed, 16 Oct, at 02:52:25PM, Luck, Tony wrote:
> > Where by "May not function correctly" you mean "May crash the system"?
> > I'm a little uneasy having this run by default if enabled, even if it's
> > disabled by default in the config.
>
> There's also an "either/or" choice between using efi-capsule with pstore, and the
> traditional kexec/kdump method for getting a memory dump from a crash. We
> have to go through a reset to save the capsule - but we don't want a reset for
> kexec. Perhaps we can pass the reset parameters through the kexec path to
> the new kernel to make it do the right kind of reset ... but the value of the capsule
> dump is minimal if kdump managed to dump everything.
I admit that using kexec with the EFI capsule + pstore code is not
something I'd considered. Though as you say, if you manage to jump to
your crash kernel I'm not sure how much use the capsule would be.
--
Matt Fleming, Intel Open Source Technology Center
WARNING: multiple messages have this Message-ID (diff)
From: Matt Fleming <matt@console-pimps.org>
To: "Luck, Tony" <tony.luck@intel.com>
Cc: Matthew Garrett <mjg59@srcf.ucam.org>,
"linux-efi@vger.kernel.org" <linux-efi@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Andi Kleen <ak@linux.intel.com>,
Seiji Aguchi <seiji.aguchi@hds.com>,
"x86@kernel.org" <x86@kernel.org>,
"Fleming, Matt" <matt.fleming@intel.com>
Subject: Re: [PATCH 5/5] efi: Capsule update support and pstore backend
Date: Thu, 17 Oct 2013 13:05:19 +0100 [thread overview]
Message-ID: <20131017120519.GF10834@console-pimps.org> (raw)
In-Reply-To: <3908561D78D1C84285E8C5FCA982C28F31D31122@ORSMSX106.amr.corp.intel.com>
On Wed, 16 Oct, at 02:52:25PM, Luck, Tony wrote:
> > Where by "May not function correctly" you mean "May crash the system"?
> > I'm a little uneasy having this run by default if enabled, even if it's
> > disabled by default in the config.
>
> There's also an "either/or" choice between using efi-capsule with pstore, and the
> traditional kexec/kdump method for getting a memory dump from a crash. We
> have to go through a reset to save the capsule - but we don't want a reset for
> kexec. Perhaps we can pass the reset parameters through the kexec path to
> the new kernel to make it do the right kind of reset ... but the value of the capsule
> dump is minimal if kdump managed to dump everything.
I admit that using kexec with the EFI capsule + pstore code is not
something I'd considered. Though as you say, if you manage to jump to
your crash kernel I'm not sure how much use the capsule would be.
--
Matt Fleming, Intel Open Source Technology Center
next prev parent reply other threads:[~2013-10-17 12:05 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-16 13:50 [PATCH 0/5] EFI capsule pstore support Matt Fleming
[not found] ` <1381931460-6999-1-git-send-email-matt-HNK1S37rvNbeXh+fF434Mdi2O/JbrIOy@public.gmane.org>
2013-10-16 13:50 ` [PATCH 1/5] pstore/ftrace: Don't increment initial data offset Matt Fleming
2013-10-16 13:50 ` Matt Fleming
2013-10-16 13:50 ` [PATCH 2/5] efi: Introduce a Runtime Services lock Matt Fleming
[not found] ` <1381931460-6999-3-git-send-email-matt-HNK1S37rvNbeXh+fF434Mdi2O/JbrIOy@public.gmane.org>
2013-10-16 23:36 ` Seiji Aguchi
2013-10-16 23:36 ` Seiji Aguchi
2013-10-16 13:50 ` [PATCH 3/5] efi: Add common efi_reboot() implementation Matt Fleming
2013-10-16 13:50 ` [PATCH 4/5] efi: Move efi_status_to_err() to efi.h Matt Fleming
2013-10-16 13:51 ` [PATCH 5/5] efi: Capsule update support and pstore backend Matt Fleming
[not found] ` <1381931460-6999-6-git-send-email-matt-HNK1S37rvNbeXh+fF434Mdi2O/JbrIOy@public.gmane.org>
2013-10-16 14:19 ` Matthew Garrett
2013-10-16 14:19 ` Matthew Garrett
[not found] ` <20131016141939.GA28684-1xO5oi07KQx4cg9Nei1l7Q@public.gmane.org>
2013-10-16 14:52 ` Luck, Tony
2013-10-16 14:52 ` Luck, Tony
[not found] ` <3908561D78D1C84285E8C5FCA982C28F31D31122-P5GAC/sN6hlZtRGVdHMbwrfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2013-10-17 0:06 ` Seiji Aguchi
2013-10-17 0:06 ` Seiji Aguchi
[not found] ` <A5ED84D3BB3A384992CBB9C77DEDA4D443EF862E-ohthHghroY0jroPwUH3sq+6wyyQG6/Uh@public.gmane.org>
2013-10-17 23:18 ` Andi Kleen
2013-10-17 23:18 ` Andi Kleen
2013-10-17 12:05 ` Matt Fleming [this message]
2013-10-17 12:05 ` Matt Fleming
2013-10-17 11:55 ` Matt Fleming
2013-10-17 11:55 ` Matt Fleming
[not found] ` <20131017115514.GE10834-HNK1S37rvNbeXh+fF434Mdi2O/JbrIOy@public.gmane.org>
2013-10-17 23:19 ` Andi Kleen
2013-10-17 23:19 ` Andi Kleen
2013-10-16 20:14 ` Andi Kleen
2013-10-16 20:14 ` Andi Kleen
2013-10-17 12:14 ` Matt Fleming
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