linux-kernel - Re: BUG: MAX_LOCKDEP_CHAIN

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Date:   Tue, 26 Jul 2022 15:21:32 -0400
From:   "Chris Murphy" <lists@...orremedies.com>
To:     "David Sterba" <dsterba@...e.cz>,
        Михаил Гаврилов 
        <mikhail.v.gavrilov@...il.com>
Cc:     "Btrfs BTRFS" <linux-btrfs@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!



On Tue, Jul 26, 2022, at 3:19 PM, Chris Murphy wrote:
> On Tue, Jul 26, 2022, at 12:42 PM, David Sterba wrote:
>> 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.
>
> Fedora is using 17. I'll make a request to bump it to 18. Thanks.

Should it be 18 across all archs? Or is it OK to only bump x86_64?

-- 
Chris Murphy