linux-kernel - Re: BUG: MAX_LOCKDEP_CHAIN

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Date:   Tue, 26 Jul 2022 18:42:50 +0200
From:   David Sterba <dsterba@...e.cz>
To:     Mikhail Gavrilov <mikhail.v.gavrilov@...il.com>
Cc:     Btrfs BTRFS <linux-btrfs@...r.kernel.org>,
        Linux List Kernel Mailing <linux-kernel@...r.kernel.org>
Subject: Re: BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!

On Tue, Jul 26, 2022 at 05:32:54PM +0500, Mikhail Gavrilov wrote:
> Hi guys.
> Always with intensive writing on a btrfs volume, the message "BUG:
> MAX_LOCKDEP_CHAIN_HLOCKS too low!" appears in the kernel logs.

Increase the config value of LOCKDEP_CHAINS_BITS, default is 16, 18
tends to work.