From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Boris Brezillon <boris.brezillon@free-electrons.com>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-rt-users@vger.kernel.org,
Nicolas Ferre <nicolas.ferre@atmel.com>
Subject: Re: Fix preempt-rt on AT91
Date: Tue, 8 Mar 2016 12:06:39 +0100 [thread overview]
Message-ID: <20160308110639.GC21842@linutronix.de> (raw)
In-Reply-To: <20160305113553.GB21216@piout.net>
* Alexandre Belloni | 2016-03-05 12:35:53 [+0100]:
>Hi Sebastian,
Hi Alexandre,
>The series landed in arm-soc and is making its way to v4.6. I guess you
>can pull the original pull request. It is based on v4.5-rc1 but should
>apply cleanly on v4.4:
I sucked this in. It seems to work. What remains that free_irq() thingy:
|WARNING: CPU: 0 PID: 0 at kernel/irq/manage.c:1541 __free_irq+0xb4/0x2e0()
|Trying to free already-free IRQ 16
|CPU: 0 PID: 0 Comm: swapper Not tainted 4.4.4-rt10+ #219
|Hardware name: Atmel SAMA5
|[<c0015bd0>] (unwind_backtrace) from [<c0013604>] (show_stack+0x10/0x14)
|[<c0013604>] (show_stack) from [<c002b850>] (warn_slowpath_common+0x80/0xac)
|[<c002b850>] (warn_slowpath_common) from [<c002b8ac>] (warn_slowpath_fmt+0x30/0x40)
|[<c002b8ac>] (warn_slowpath_fmt) from [<c005adfc>] (__free_irq+0xb4/0x2e0)
|[<c005adfc>] (__free_irq) from [<c005b0a0>] (free_irq+0x30/0x4c)
|[<c005b0a0>] (free_irq) from [<c0429034>] (pit_clkevt_shutdown+0x24/0x2c)
|[<c0429034>] (pit_clkevt_shutdown) from [<c0076430>] (clockevents_switch_state+0x60/0x130)
|---[ end trace 0000000000000001 ]---
which is a different problem and was there. The new thing is this:
|WARNING: CPU: 0 PID: 1 at kernel/locking/rtmutex.c:2062 rt_mutex_trylock+0x30/0x108)
|Modules linked in:
|CPU: 0 PID: 1 Comm: swapper Tainted: G W 4.4.4-rt10+ #219
|Hardware name: Atmel SAMA5
|[<c0015bd0>] (unwind_backtrace) from [<c0013604>] (show_stack+0x10/0x14)
|[<c0013604>] (show_stack) from [<c002b850>] (warn_slowpath_common+0x80/0xac)
|[<c002b850>] (warn_slowpath_common) from [<c002b918>] (warn_slowpath_null+0x1c/0x24)
|[<c002b918>] (warn_slowpath_null) from [<c054a54c>] (rt_mutex_trylock+0x30/0x108)
|[<c054a54c>] (rt_mutex_trylock) from [<c054bd0c>] (rt_spin_trylock_irqsave+0x10/0x1c)
|[<c054bd0c>] (rt_spin_trylock_irqsave) from [<c043e030>] (clk_enable_lock+0x18/0x114)
|[<c043e030>] (clk_enable_lock) from [<c043f600>] (clk_disable+0x1c/0x34)
|[<c043f600>] (clk_disable) from [<c0429188>] (tc_shutdown+0x34/0x3c)
|[<c0429188>] (tc_shutdown) from [<c04291b0>] (tc_set_oneshot+0x20/0x50)
|[<c04291b0>] (tc_set_oneshot) from [<c00764a4>] (clockevents_switch_state+0xd4/0x130)
|[<c00764a4>] (clockevents_switch_state) from [<c00773e8>] (tick_switch_to_oneshot+0x48/0xb8)
|[<c00773e8>] (tick_switch_to_oneshot) from [<c006a480>] (hrtimer_run_queues+0x48/0x108)
|[<c006a480>] (hrtimer_run_queues) from [<c0068dd8>] (update_process_times+0x2c/0x64)
|[<c0068dd8>] (update_process_times) from [<c0076ad0>] (tick_handle_periodic+0x1c/0x90)
|[<c0076ad0>] (tick_handle_periodic) from [<c0429274>] (ch2_irq+0x20/0x28)
|[<c0429274>] (ch2_irq) from [<c005a39c>] (handle_irq_event_percpu+0x74/0x16c)
Is it possible to drop this disable/enable clock on the switch from pit
to one shot mode?
>You may also stop at 99a81706526fb167029a940ef1f7bfbe882abd3e which
>should solve the crash but it has not been tested as thoroughly.
Did you confuse the sha1 with something? This patch is called ("clk:
at91: remove IRQ handling and use polling") and is part of the series
you gave (patch #3).
>Thanks!
Sebastian
next prev parent reply other threads:[~2016-03-08 11:06 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-17 2:23 Fix preempt-rt on AT91 Alexandre Belloni
2016-01-17 2:23 ` [PATCH 4.4-rt2] fix arm-at91-pit-remove-irq-handler-when-clock-is-unused.patch Alexandre Belloni
2016-01-18 17:25 ` Sebastian Andrzej Siewior
2016-01-18 18:42 ` Alexandre Belloni
2016-01-18 20:24 ` Sebastian Andrzej Siewior
2016-01-19 1:22 ` Alexandre Belloni
2016-01-20 11:07 ` Thomas Gleixner
2016-03-17 19:55 ` Alexandre Belloni
2016-01-18 17:42 ` Fix preempt-rt on AT91 Sebastian Andrzej Siewior
2016-01-18 19:23 ` Alexandre Belloni
2016-01-18 20:30 ` Sebastian Andrzej Siewior
2016-01-19 1:02 ` Alexandre Belloni
2016-03-05 11:35 ` Alexandre Belloni
2016-03-08 11:06 ` Sebastian Andrzej Siewior [this message]
2016-03-08 11:26 ` Thomas Gleixner
2016-03-08 18:39 ` Alexandre Belloni
2016-03-09 9:58 ` arm: at91: do not disable/enable clocks in a row Sebastian Andrzej Siewior
2016-03-17 18:09 ` Alexandre Belloni
2016-02-18 20:16 ` Fix preempt-rt on AT91 Jean-Denis Girard
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