All of lore.kernel.org
 help / color / mirror / Atom feed
From: Russell King - ARM Linux <linux@arm.linux.org.uk>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: Frank Rowand <frank.rowand@am.sony.com>,
	"paulmck@linux.vnet.ibm.com" <paulmck@linux.vnet.ibm.com>,
	"Rowand, Frank" <Frank_Rowand@sonyusa.com>,
	Peter Zijlstra <peterz@infradead.org>,
	linux-kernel <linux-kernel@vger.kernel.org>,
	linux-rt-users <linux-rt-users@vger.kernel.org>,
	Mike Galbraith <efault@gmx.de>, Ingo Molnar <mingo@tglx.de>,
	Venkatesh Pallipadi <venki@google.com>
Subject: Re: [ANNOUNCE] 3.0.1-rt11
Date: Wed, 7 Sep 2011 11:46:33 +0100	[thread overview]
Message-ID: <20110907104633.GR6619@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <alpine.LFD.2.02.1109071115410.2723@ionos>

On Wed, Sep 07, 2011 at 11:25:29AM +0200, Thomas Gleixner wrote:
> This smells badly like the problem we've seen on x86 before. And
> looking at the arm SMP boot code:
> 
> asmlinkage void __cpuinit secondary_start_kernel(void)
> {
> 	.....
> 
> 	/*
> 	 * Give the platform a chance to do its own initialisation.
> 	 */
> 	platform_secondary_init(cpu);
> 
> 	/*
> 	 * Enable local interrupts.
> 	 */
> 	notify_cpu_starting(cpu);
> 	local_irq_enable();
> 
> Here we enable interrupts, but the CPU is neither online nor active.
> 
> 	local_fiq_enable();

That's intentional.  Some of the code below needs IRQs enabled.

I think we had this reported before and I got to the bottom of it - the
platform was doing something it shouldn't.  I don't remember the details,
maybe when all the emails come through I can see the original bug report
I'll remember.

  reply	other threads:[~2011-09-07 12:05 UTC|newest]

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-08-13 10:53 [ANNOUNCE] 3.0.1-rt11 Peter Zijlstra
2011-08-13 11:48 ` Mike Galbraith
2011-08-13 11:58   ` Peter Zijlstra
2011-08-13 13:59     ` Mike Galbraith
2011-08-13 14:23       ` Peter Zijlstra
2011-08-13 16:27       ` Paul E. McKenney
2011-08-14  4:23         ` Mike Galbraith
2011-08-16 14:17           ` Nivedita Singhvi
2011-08-16 15:10             ` Mike Galbraith
2011-08-16 15:18               ` Nivedita Singhvi
2011-08-16 19:31               ` Paul E. McKenney
2011-08-17  4:28                 ` Mike Galbraith
2011-08-17  5:03                   ` Nivedita Singhvi
2011-08-15 10:09         ` Mike Galbraith
2011-08-14 21:19 ` Clark Williams
2011-08-21  8:30 ` patches/mm-memory-rt.patch can go away Mike Galbraith
2011-08-23 14:12 ` [patch] sched, rt: fix migrate_enable() thinko Mike Galbraith
2011-09-08  2:11   ` Frank Rowand
2011-09-08  4:58     ` Mike Galbraith
2011-08-24 23:58 ` [ANNOUNCE] 3.0.1-rt11 Frank Rowand
2011-08-26 23:55   ` Paul E. McKenney
2011-08-29 19:57     ` Frank Rowand
2011-08-30  3:17       ` Paul E. McKenney
2011-09-07  2:53     ` Frank Rowand
2011-09-07  3:00       ` Frank Rowand
2011-09-07  3:00         ` Frank Rowand
2011-09-07  6:42       ` Paul E. McKenney
2011-09-07  9:25       ` Thomas Gleixner
2011-09-07  9:25         ` Thomas Gleixner
2011-09-07 10:46         ` Russell King - ARM Linux [this message]
2011-09-07 10:47           ` Russell King - ARM Linux
2011-09-07 10:57             ` Thomas Gleixner
2011-09-07 14:01               ` Russell King - ARM Linux
2011-09-07 16:32                 ` Thomas Gleixner
2011-09-07 16:33                 ` Frank Rowand

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=20110907104633.GR6619@n2100.arm.linux.org.uk \
    --to=linux@arm.linux.org.uk \
    --cc=Frank_Rowand@sonyusa.com \
    --cc=efault@gmx.de \
    --cc=frank.rowand@am.sony.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-rt-users@vger.kernel.org \
    --cc=mingo@tglx.de \
    --cc=paulmck@linux.vnet.ibm.com \
    --cc=peterz@infradead.org \
    --cc=tglx@linutronix.de \
    --cc=venki@google.com \
    /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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.