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Date:   Mon, 15 Jun 2020 16:57:48 +0530
From:   Ritesh Harjani <riteshh@...ux.ibm.com>
To:     Pavel Machek <pavel@....cz>,
        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: Re: 5.8-rc1: new warnings in ext4_mb_new_blocks?



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

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