linux-ext4 - 5.8-rc1: new warnings in ext4_mb_new

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Date:   Mon, 15 Jun 2020 09:37:12 +0200
From:   Pavel Machek <pavel@....cz>
To:     kernel list <linux-kernel@...r.kernel.org>, peterz@...radead.org,
        mingo@...hat.com, will@...nel.org, jack@...e.com, tytso@....edu,
        adilger.kernel@...ger.ca, linux-ext4@...r.kernel.org
Subject: 5.8-rc1: new warnings in ext4_mb_new_blocks?

Hi!

Booting 5.8-rc1 on x220, I get scary warnings:

[    7.089941] EXT4-fs (sdb2): mounted filesystem with ordered data mode. Opts: errors=remount-ro
[    7.343231] BUG: using smp_processor_id() in preemptible [00000000] code: systemd-tmpfile/2788
[    7.344052] caller is debug_smp_processor_id+0x17/0x20
[    7.344897] CPU: 3 PID: 2788 Comm: systemd-tmpfile Not tainted 5.8.0-rc1+ #116
[    7.345745] Hardware name: LENOVO 42872WU/42872WU, BIOS 8DET74WW (1.44 ) 03/13/2018
[    7.346561] Call Trace:
[    7.347355]  dump_stack+0x60/0x7a
[    7.348170]  check_preemption_disabled+0xb1/0xc0
[    7.348951]  debug_smp_processor_id+0x17/0x20
[    7.349728]  ext4_mb_new_blocks+0x1f2/0x13e0

and they continue after boot.
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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