5.8-rc1: new warnings in ext4_mb_new_blocks?

5.8-rc1: new warnings in ext4_mb_new_blocks?

[Pavel Machek]

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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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Re: 5.8-rc1: new warnings in ext4_mb_new_blocks?

[Ritesh Harjani]

On 6/15/20 1:07 PM, Pavel Machek wrote:
> 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.
> 

Below should fix this. I guess it couldn't make it to rc1.

https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?h=ext4-for-linus-5.8-rc1-2&id=811985365378df01386c3cfb7ff716e74ca376d5

-ritesh

Re: 5.8-rc1: new warnings in ext4_mb_new_blocks?

[Pavel Machek]

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On Mon 2020-06-15 16:57:48, Ritesh Harjani wrote:
> 
> 
> On 6/15/20 1:07 PM, Pavel Machek wrote:
> > 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.
> > 
> 
> Below should fix this. I guess it couldn't make it to rc1.
> 
> https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?h=ext4-for-linus-5.8-rc1-2&id=811985365378df01386c3cfb7ff716e74ca376d5
> 

Thanks for the pointer. That seems to do the job.

Best regards,
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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