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Date:   Tue, 19 Feb 2019 15:58:26 +0100
From:   Juri Lelli <>
To:     Sebastian Andrzej Siewior <>
        Thomas Gleixner <>,
        Steven Rostedt <>
Subject: Re: [PATCH RT 1/2] softirq: Avoid "local_softirq_pending" messages
 if ksoftirqd is blocked


On 18/02/19 17:31, Sebastian Andrzej Siewior wrote:
> If the ksoftirqd thread has a softirq pending and is blocked on the
> `local_softirq_locks' lock then softirq_check_pending_idle() won't
> complain because the "lock owner" will mask away this softirq from the
> mask of pending softirqs.
> If ksoftirqd has an additional softirq pending then it won't be masked
> out because we never look at ksoftirqd's mask.
> If there are still pending softirqs while going to idle check
> ksoftirqd's and ktimersfotd's mask before complaining about unhandled
> softirqs.
> Cc:
> Signed-off-by: Sebastian Andrzej Siewior <>

I've been seeing those messages while running some stress tests (hog
tasks pinned to CPUs).

Have yet to see them after I applied this patch earlier this morning (it
usually took not much time to reproduce).

Tested-by: Juri Lelli <>


- Juri

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