From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Grygorii Strashko <grygorii.strashko@ti.com>,
Mike Galbraith <umgwanakikbuti@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
LKML <linux-kernel@vger.kernel.org>,
linux-rt-users <linux-rt-users@vger.kernel.org>
Subject: Re: [rfc patch v4.4-rt2] sched: fix up preempt lazy forward port
Date: Fri, 22 Jan 2016 14:19:05 +0100 [thread overview]
Message-ID: <56A22C49.5020401@linutronix.de> (raw)
In-Reply-To: <56A21F7D.9070101@ti.com>
On 01/22/2016 01:24 PM, Grygorii Strashko wrote:
> I can see below backtrace during boot if i backport this change in K4.1-rt
> TI am437x-idk (UP) board.
>
> [ 0.204022] Switched to clocksource arm_global_timer
> [ 0.211982] ------------[ cut here ]------------
> [ 0.212021] WARNING: CPU: 0 PID: 3 at kernel/softirq.c:894 __tasklet_action+0x150/0x17c()
> [ 0.212027] Modules linked in:
> [ 0.212041] CPU: 0 PID: 3 Comm: ksoftirqd/0 Not tainted 4.1.15-rt11-00324-g52f8148-dirty #117
> [ 0.212046] Hardware name: Generic AM43 (Flattened Device Tree)
> [ 0.212052] Backtrace:
> [ 0.212080] [<c0012b50>] (dump_backtrace) from [<c0012d70>] (show_stack+0x18/0x1c)
> [ 0.212085] r7:c0730a84 r6:0000037e r5:00000009 r4:00000000
> [ 0.212112] [<c0012d58>] (show_stack) from [<c05e6940>] (dump_stack+0x20/0x28)
> [ 0.212124] [<c05e6920>] (dump_stack) from [<c003713c>] (warn_slowpath_common+0x7c/0xb4)
> [ 0.212134] [<c00370c0>] (warn_slowpath_common) from [<c0037218>] (warn_slowpath_null+0x24/0x2c)
> [ 0.212138] r8:000f4240 r7:00000000 r6:c0841238 r5:00000018 r4:00000006
> [ 0.212156] [<c00371f4>] (warn_slowpath_null) from [<c003a0a4>] (__tasklet_action+0x150/0x17c)
> [ 0.212165] [<c0039f54>] (__tasklet_action) from [<c003a138>] (tasklet_action+0x30/0x38)
> [ 0.212169] r9:04208140 r8:c0862300 r7:000000c0 r6:c082d774 r5:00000018 r4:00000006
> [ 0.212187] [<c003a108>] (tasklet_action) from [<c0039c2c>] (do_current_softirqs+0x190/0x258)
> [ 0.212197] [<c0039a9c>] (do_current_softirqs) from [<c003a170>] (run_ksoftirqd+0x30/0x58)
> [ 0.212201] r10:00000000 r9:00000000 r8:00000002 r7:c082d8f0 r6:00000001 r5:ee81f740
> [ 0.212213] r4:ee874000
> [ 0.212227] [<c003a140>] (run_ksoftirqd) from [<c00534e0>] (smpboot_thread_fn+0x15c/0x278)
> [ 0.212242] [<c0053384>] (smpboot_thread_fn) from [<c00500fc>] (kthread+0xcc/0xe4)
> [ 0.212246] r9:00000000 r8:00000000 r7:c0053384 r6:ee81f740 r5:ee81f780 r4:00000000
> [ 0.212265] [<c0050030>] (kthread) from [<c000f988>] (ret_from_fork+0x14/0x2c)
> [ 0.212269] r7:00000000 r6:00000000 r5:c0050030 r4:ee81f780
> [ 0.212279] ---[ end trace 0000000000000001 ]---
> [ 0.212284] softirq: ================== c037d4c4 <---- t->func
> ^^
> # grep c037d4c4 System.map
> c037d4c4 t kbd_bh
Do you still see it with the missing lazy bits? I don't see where this
could come from.
Sebastian
next prev parent reply other threads:[~2016-01-22 13:19 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-18 9:08 [rfc patch v4.4-rt2] sched: fix up preempt lazy forward port Mike Galbraith
2016-01-18 20:18 ` Sebastian Andrzej Siewior
2016-01-19 2:29 ` Mike Galbraith
2016-01-21 12:54 ` Sebastian Andrzej Siewior
2016-01-22 12:24 ` Grygorii Strashko
2016-01-22 13:19 ` Sebastian Andrzej Siewior [this message]
2016-01-22 13:34 ` Grygorii Strashko
2016-01-22 14:14 ` Sebastian Andrzej Siewior
2016-01-22 15:04 ` Grygorii Strashko
2016-01-22 18:21 ` Grygorii Strashko
2016-02-21 15:11 ` [patch] sched,rt: __always_inline preemptible_lazy() Mike Galbraith
2016-01-19 4:41 ` [rfc patch v4.4-rt2] sched: fix up preempt lazy forward port Mike Galbraith
2016-01-19 5:14 ` Mike Galbraith
2016-01-22 11:58 ` Grygorii Strashko
2016-01-22 12:54 ` Sebastian Andrzej Siewior
2016-01-22 20:40 ` Sebastian Andrzej Siewior
2016-01-25 17:14 ` Grygorii Strashko
2016-02-01 13:04 ` Sebastian Andrzej Siewior
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