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From: Thomas Gleixner <tglx@linutronix.de>
To: Heiner Kallweit <hkallweit1@gmail.com>
Cc: Anna-Maria Gleixner <anna-maria@linutronix.de>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Frederic Weisbecker <fweisbec@gmail.com>
Subject: Re: Fix 80d20d35af1e ("nohz: Fix local_timer_softirq_pending()") may have revealed another problem
Date: Sat, 18 Aug 2018 13:26:47 +0200 (CEST)	[thread overview]
Message-ID: <alpine.DEB.2.21.1808181323430.2151@nanos.tec.linutronix.de> (raw)
In-Reply-To: <8b93f213-fe67-f132-f3f5-5b17995ec63d@gmail.com>

On Thu, 16 Aug 2018, Heiner Kallweit wrote:

> Recently I started to get warning "NOHZ: local_softirq_pending 202" and
> I think it's related to mentioned commit (didn't bisect it yet).
> See log from suspending.
> 
> I have no reason to think the fix is wrong, it may just have revealed
> another issue which existed before and was hidden by the bug.

Looks so. That seems to be related to CPU offlining. No idea yet...

> Rgds, Heiner
> 
> [   75.073353] random: crng init done
> [   75.073402] random: 7 urandom warning(s) missed due to ratelimiting
> [   78.619564] PM: suspend entry (deep)
> [   78.619675] PM: Syncing filesystems ... done.
> [   78.653684] Freezing user space processes ... (elapsed 0.002 seconds) done.
> [   78.656094] OOM killer disabled.
> [   78.656113] Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done.
> [   78.658177] Suspending console(s) (use no_console_suspend to debug)
> [   78.663066] nuvoton-cir 00:07: disabled
> [   78.671817] sd 0:0:0:0: [sda] Synchronizing SCSI cache
> [   78.672210] sd 0:0:0:0: [sda] Stopping disk
> [   78.786651] ACPI: Preparing to enter system sleep state S3
> [   78.789613] PM: Saving platform NVS memory
> [   78.789759] Disabling non-boot CPUs ...
> [   78.805154] NOHZ: local_softirq_pending 202
> [   78.805182] NOHZ: local_softirq_pending 202
> [   78.807102] smpboot: CPU 1 is now offline
> 

  reply	other threads:[~2018-08-18 11:26 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-08-16  6:13 Fix 80d20d35af1e ("nohz: Fix local_timer_softirq_pending()") may have revealed another problem Heiner Kallweit
2018-08-18 11:26 ` Thomas Gleixner [this message]
2018-08-18 22:34   ` Heiner Kallweit
2018-08-24  4:12 ` Frederic Weisbecker
2018-08-24  5:59   ` Heiner Kallweit
2018-08-24  8:01     ` Thomas Gleixner
2018-08-24 14:30       ` Frederic Weisbecker
2018-08-24 17:06         ` Heiner Kallweit
2018-08-28  2:25           ` Frederic Weisbecker
2018-09-27 16:05             ` Thomas Gleixner
2018-09-28 13:18               ` Frederic Weisbecker
2018-09-28 20:35                 ` Heiner Kallweit
2018-10-15 20:58                 ` Heiner Kallweit
2018-12-24 21:11                   ` Heiner Kallweit
2018-12-27  6:53                   ` Frederic Weisbecker
2018-12-27 23:11                     ` Heiner Kallweit
2018-12-28  1:31                       ` Frederic Weisbecker
2018-12-28  6:34                         ` Heiner Kallweit
2018-12-28  6:39                           ` Heiner Kallweit
2019-01-09 22:20                             ` Heiner Kallweit
2019-01-11 21:36                               ` Frederic Weisbecker
2019-01-16  6:24                       ` Frederic Weisbecker
2019-01-16 18:42                         ` Heiner Kallweit
2019-01-24 19:37                         ` Heiner Kallweit
2019-02-14 19:05                           ` Heiner Kallweit
2019-02-14 21:47                             ` Thomas Gleixner
2019-02-14 22:33                               ` Heiner Kallweit
2019-02-15  0:31                                 ` Frederic Weisbecker
2019-02-16  9:14                                   ` Heiner Kallweit

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