From: will.deacon@arm.com (Will Deacon)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] ARM: call disable_nonboot_cpus() from machine_shutdown()
Date: Thu, 3 Jan 2013 12:03:50 +0000 [thread overview]
Message-ID: <20130103120349.GC5193@mudshark.cambridge.arm.com> (raw)
In-Reply-To: <1357160861-26282-1-git-send-email-swarren@wwwdotorg.org>
On Wed, Jan 02, 2013 at 09:07:41PM +0000, Stephen Warren wrote:
> From: Stephen Warren <swarren@nvidia.com>
>
> On Tegra at least, this change allows kexec to work with SMP enabled.
> Without this, machine_shutdown() simply puts all CPUs into a loop. If
> the code of that loop is over-written, the CPUs may hang or crash (which
> I do observe in practice), or cause the kexec'd kernel not to be able to
> initialize them.
>
> This fix has the added benefit that the kexec always happens on the boot
> CPU, and thus kexec mirrors the initial kernel boot as much as possible.
>
> Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Cheers Stephen,
Will
prev parent reply other threads:[~2013-01-03 12:03 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-02 21:07 [PATCH] ARM: call disable_nonboot_cpus() from machine_shutdown() Stephen Warren
2013-01-02 21:52 ` Russell King - ARM Linux
2013-01-02 23:59 ` Stephen Boyd
2013-01-03 12:02 ` Will Deacon
2013-01-03 12:21 ` Russell King - ARM Linux
2013-01-03 18:08 ` Jason Gunthorpe
2013-01-03 20:26 ` Stephen Warren
2013-01-06 16:22 ` Will Deacon
2013-01-06 16:40 ` Russell King - ARM Linux
2013-01-07 1:53 ` Eric W. Biederman
2013-01-07 14:25 ` Will Deacon
2013-01-07 14:48 ` Russell King - ARM Linux
2013-01-11 5:59 ` Eric W. Biederman
2013-01-11 10:04 ` Russell King - ARM Linux
2013-01-29 22:01 ` Stephen Warren
2013-01-09 0:06 ` Stephen Warren
2013-01-11 6:28 ` Eric W. Biederman
2013-01-29 22:10 ` Stephen Warren
2013-01-03 12:03 ` Will Deacon [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20130103120349.GC5193@mudshark.cambridge.arm.com \
--to=will.deacon@arm.com \
--cc=linux-arm-kernel@lists.infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).