From: Santosh Shilimkar <santosh.shilimkar@ti.com>
To: Russell King - ARM Linux <linux@arm.linux.org.uk>
Cc: Peter Zijlstra <peterz@infradead.org>,
Thomas Gleixner <tglx@linutronix.de>,
linux-omap@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Subject: Re: [RFC PATCH] ARM: smp: Fix the CPU hotplug race with scheduler.
Date: Mon, 20 Jun 2011 16:17:58 +0530 [thread overview]
Message-ID: <4DFF255E.5030308@ti.com> (raw)
In-Reply-To: <20110620104415.GF2082@n2100.arm.linux.org.uk>
On 6/20/2011 4:14 PM, Russell King - ARM Linux wrote:
> On Mon, Jun 20, 2011 at 03:58:03PM +0530, Santosh Shilimkar wrote:
>> No it doesn't work. I still get the crash. The important point
>> here is not to enable interrupts before CPU is marked
>> as online and active.
>
> What is the crash (in full please)?
>
> Do we know what interrupt is causing it?
Yes. It's because of interrupt and the CPU active-online
race.
Here is the chash log..
[ 21.025451] CPU1: Booted secondary processor
[ 21.025451] CPU1: Unknown IPI message 0x1
[ 21.029113] Switched to NOHz mode on CPU #1
[ 21.029174] BUG: spinlock lockup on CPU#1, swapper/0, c06220c4
[ 21.029235] [<c0064704>] (unwind_backtrace+0x0/0xf4) from
[<c028edc8>] (do_raw_spin_lock+0xd0/0x164)
[ 21.029266] [<c028edc8>] (do_raw_spin_lock+0xd0/0x164) from
[<c00cc3c4>] (tick_do_update_jiffies64+0x3c/0x118)
[ 21.029296] [<c00cc3c4>] (tick_do_update_jiffies64+0x3c/0x118) from
[<c00ccb04>] (tick_check_idle+0xb0/0x110)
[ 21.029327] [<c00ccb04>] (tick_check_idle+0xb0/0x110) from
[<c00a29cc>] (irq_enter+0x68/0x70)
[ 21.029327] [<c00a29cc>] (irq_enter+0x68/0x70) from [<c00623c4>]
(ipi_timer+0x24/0x40)
[ 21.029357] [<c00623c4>] (ipi_timer+0x24/0x40) from [<c0051368>]
(do_local_timer+0x54/0x70)
[ 21.029388] [<c0051368>] (do_local_timer+0x54/0x70) from [<c048a09c>]
(__irq_svc+0x3c/0x120)
[ 21.029388] Exception stack(0xef87bf78 to 0xef87bfc0)
[ 21.029388] bf60:
00000000 00026ec0
[ 21.029418] bf80: c0622080 ffff7483 c0622080 ffff7483 ef87a000
00000000 c0622080 411fc092
[ 21.029418] bfa0: c063a4f0 00000000 00000001 ef87bfc0 c0482e08
c0482b0c 60000113 ffffffff
[ 21.029449] [<c048a09c>] (__irq_svc+0x3c/0x120) from [<c0482b0c>]
(calibrate_delay+0x8c/0x1d4)
[ 21.029479] [<c0482b0c>] (calibrate_delay+0x8c/0x1d4) from
[<c0482e08>] (secondary_start_kernel+0x110/0x1ac)
[ 21.029510] [<c0482e08>] (secondary_start_kernel+0x110/0x1ac) from
[<c0070ee4>] (platform_cpu_die+0x34/0x54)
[ 22.021362] CPU1: failed to come online
[ 23.997955] CPU1: failed to come online
[ 25.000122] BUG: spinlock lockup on CPU#0, kthreadd/663, efa27e64
[ 25.006408] [<c0064704>] (unwind_backtrace+0x0/0xf4) from
[<c028edc8>] (do_raw_spin_lock+0xd0/0x164)
[ 25.015808] [<c028edc8>] (do_raw_spin_lock+0xd0/0x164) from
[<c048985c>] (_raw_spin_lock_irqsave+0x4c/0x58)
[ 25.025848] [<c048985c>] (_raw_spin_lock_irqsave+0x4c/0x58) from
[<c008ba24>] (complete+0x1c/0x5c)
[ 25.035095] [<c008ba24>] (complete+0x1c/0x5c) from [<c00baf78>]
(kthread+0x68/0x90)
[ 25.042968] [<c00baf78>] (kthread+0x68/0x90) from [<c005dfdc>]
(kernel_thread_exit+0x0/0x8)
next prev parent reply other threads:[~2011-06-20 10:47 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-20 9:23 [RFC PATCH] ARM: smp: Fix the CPU hotplug race with scheduler Santosh Shilimkar
2011-06-20 9:50 ` Russell King - ARM Linux
2011-06-20 10:14 ` Russell King - ARM Linux
2011-06-20 10:28 ` Santosh Shilimkar
2011-06-20 10:35 ` Russell King - ARM Linux
2011-06-20 10:45 ` Santosh Shilimkar
2011-06-20 11:42 ` Santosh Shilimkar
2011-06-20 10:44 ` Russell King - ARM Linux
2011-06-20 10:47 ` Santosh Shilimkar [this message]
2011-06-20 11:13 ` Russell King - ARM Linux
2011-06-20 11:25 ` Santosh Shilimkar
2011-06-20 11:40 ` Russell King - ARM Linux
2011-06-20 11:51 ` Santosh Shilimkar
2011-06-20 12:19 ` Russell King - ARM Linux
2011-06-20 12:27 ` Santosh Shilimkar
2011-06-20 12:57 ` Russell King - ARM Linux
2011-06-20 14:23 ` Russell King - ARM Linux
2011-06-20 14:54 ` Santosh Shilimkar
2011-06-20 15:01 ` Russell King - ARM Linux
2011-06-20 15:10 ` Santosh Shilimkar
2011-06-21 9:08 ` Santosh Shilimkar
2011-06-21 10:00 ` Russell King - ARM Linux
2011-06-21 10:17 ` Santosh Shilimkar
2011-06-21 10:19 ` Russell King - ARM Linux
2011-06-21 10:21 ` Santosh Shilimkar
2011-06-21 10:26 ` Russell King - ARM Linux
2011-06-21 20:16 ` Stephen Boyd
2011-06-21 23:10 ` Russell King - ARM Linux
2011-06-22 0:06 ` Stephen Boyd
2011-06-22 10:06 ` Russell King - ARM Linux
2011-06-20 10:19 ` Santosh Shilimkar
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=4DFF255E.5030308@ti.com \
--to=santosh.shilimkar@ti.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-omap@vger.kernel.org \
--cc=linux@arm.linux.org.uk \
--cc=peterz@infradead.org \
--cc=tglx@linutronix.de \
/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