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From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Peter Zijlstra <peterz@infradead.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Ingo Molnar <mingo@kernel.org>, Will Deacon <will@kernel.org>,
	"Paul E . McKenney" <paulmck@kernel.org>,
	Joel Fernandes <joel@joelfernandes.org>,
	Steven Rostedt <rostedt@goodmis.org>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Linux ARM <linux-arm-kernel@lists.infradead.org>,
	Russell King <rmk+kernel@armlinux.org.uk>,
	Catalin Marinas <catalin.marinas@arm.com>
Subject: Re: [PATCH 6/9] lockdep: Introduce wait-type checks
Date: Tue, 31 Mar 2020 15:42:49 +0200	[thread overview]
Message-ID: <20200331134249.kf3zyf27xtspmlif@linutronix.de> (raw)
In-Reply-To: <CAMuHMdU6s1F=DnaguZXrV4sWzEO-EqTaGQ=N7zyhgGq1M+Q1Ug@mail.gmail.com>

On 2020-03-31 15:25:21 [+0200], Geert Uytterhoeven wrote:
> Hi all,
Hi Geert,

> On arm64 (e.g. R-Car H3 ES2.0):
> 
> +=============================
> +[ BUG: Invalid wait context ]
> +5.6.0-salvator-x-09423-gb29514ba13a9c459-dirty #679 Not tainted
> +-----------------------------
> +swapper/5/0 is trying to lock:
> +ffffff86ff76f398 (&pool->lock){..-.}-{3:3}, at: __queue_work+0x134/0x430

The pool->lock is not yet converted.
…
> On arm32 (e.g SH-Mobile AG5, using Cortex-A9 TWD):
> 
> +=============================
> +[ BUG: Invalid wait context ]
> +5.6.0-kzm9g-09424-g2698719b4c4f35db-dirty #253 Not tainted
> +-----------------------------
> +swapper/0/0 is trying to lock:
> +dfbc5250 (&pool->lock){..-.}-{3:3}, at: __queue_work+0x14c/0x4d0

same issue.

> I also see it on other arm32 platforms using Renesas-specific timers,
> but I'll ignore those until the issues with "standard" ARM timers have
> been resolved ;-)

There are some known culprits, like the work infrastructure. The printk
is another one. From Kconfig:

|   NOTE: There are known nesting problems. So if you enable this
|   option expect lockdep splats until these problems have been fully
|   addressed which is work in progress. This config switch allows to
|   identify and analyze these problems. It will be removed and the
|   check permanentely enabled once the main issues have been fixed.


> Thanks!
> 
> Gr{oetje,eeting}s,
> 
>                         Geert
> 
> 

Sebastian

  reply	other threads:[~2020-03-31 13:42 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-13 17:46 [PATCH 0/9] Lock ordering documentation and annotation for lockdep Sebastian Andrzej Siewior
2020-03-13 17:46 ` [PATCH 1/9] Documentation: Add lock ordering and nesting documentation Sebastian Andrzej Siewior
2020-03-14 22:57   ` Randy Dunlap
2020-03-16 10:34     ` Sebastian Andrzej Siewior
2020-03-16 15:13       ` Randy Dunlap
2020-03-13 17:46 ` [PATCH 2/9] timekeeping: Split jiffies seqlock Sebastian Andrzej Siewior
2020-03-13 17:46 ` [PATCH 3/9] pci/switchtec: Don't abuse completion wait queue for poll Sebastian Andrzej Siewior
2020-03-13 18:11   ` Logan Gunthorpe
2020-03-14  0:23     ` Thomas Gleixner
2020-03-14  6:01       ` Logan Gunthorpe
2020-03-16 18:52         ` Thomas Gleixner
2020-03-16 19:24           ` Logan Gunthorpe
2020-03-16 19:34     ` Thomas Gleixner
2020-03-16 21:53       ` Logan Gunthorpe
2020-03-17  0:17         ` Thomas Gleixner
2020-03-17  1:15           ` Logan Gunthorpe
2020-03-13 19:31   ` Peter Zijlstra
2020-03-13 17:46 ` [PATCH 4/9] sched/swait: Prepare usage in completions Sebastian Andrzej Siewior
2020-03-14  0:26   ` Thomas Gleixner
2020-03-13 17:46 ` [PATCH 5/9] completion: Use simple wait queues Sebastian Andrzej Siewior
2020-03-14 15:40   ` Linus Torvalds
2020-03-16 18:55     ` Thomas Gleixner
2020-03-13 17:46 ` [PATCH 6/9] lockdep: Introduce wait-type checks Sebastian Andrzej Siewior
2020-03-31 13:25   ` Geert Uytterhoeven
2020-03-31 13:42     ` Sebastian Andrzej Siewior [this message]
2020-03-31 14:55     ` Peter Zijlstra
2020-03-31 15:28       ` Peter Zijlstra
2020-03-31 15:37         ` Frederic Weisbecker
2020-03-13 17:46 ` [PATCH 7/9] lockdep: Add hrtimer context tracing bits Sebastian Andrzej Siewior
2020-03-13 17:47 ` [PATCH 8/9] lockdep: Annotate irq_work Sebastian Andrzej Siewior
2020-03-13 17:47 ` [PATCH 9/9] lockdep: Add posixtimer context tracing bits Sebastian Andrzej Siewior

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