linux-kernel - Re: BUG: MAX_LOCKDEP_CHAIN

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Date:   Mon, 28 Mar 2022 08:10:35 +0000
From:   Johannes Thumshirn <Johannes.Thumshirn@....com>
To:     Ammar Faizi <ammarfaizi2@...weeb.org>, Chris Mason <clm@...com>,
        David Sterba <dsterba@...e.com>,
        Josef Bacik <josef@...icpanda.com>
CC:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Btrfs Mailing List <linux-btrfs@...r.kernel.org>
Subject: Re: BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low

On 27/03/2022 03:31, Ammar Faizi wrote:
> 
> Hello btrfs maintainers,
> 
> I got the following bug in Linux 5.17.0 stable. I don't have the
> reproducer for this. I will send any update if I find something
> relevant. If anyone has any suggestion on how to debug this further,
> or wants me to test a patch after it gets a reliable reproducer,
> or something, please let me know. I will try it on my machine.
> 
> If you need me to send something to investigate this, please let
> me know.
> 

This can be solved by increasing CONFIG_LOCKDEP_CHAINS_BITS.