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From:   Su Yue <l@damenly.su>
To:     Chris Murphy <lists@colorremedies.com>
Cc:     Qu Wenruo <quwenruo.btrfs@gmx.com>,
        Nikolay Borisov <nborisov@suse.com>, Qu Wenruo <wqu@suse.com>,
        Btrfs BTRFS <linux-btrfs@vger.kernel.org>
Subject: Re: 5.14.9 aarch64 OOPS Workqueue: btrfs-delalloc btrfs_work_helper
Date:   Tue, 19 Oct 2021 09:24:05 +0800
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On Mon 18 Oct 2021 at 14:24, Chris Murphy 
<lists@colorremedies.com> wrote:

> I've got kdump.service setup and ready, but I'm not sure about 
> two things:
>
> 1.
> $ git clone https://github.com/kdave/btrfs-devel
> Cloning into 'btrfs-devel'...
> fatal: error reading section header 'shallow-info'
>
> 2.
> How to capture the kernel core dump, if I need to do anything to
> trigger it other than reproducing the reported problem or if 
> I'll need
> to do sysrq+c or other.
>
No need to do other things, you can test if kdump works by
triggering a panic using sysrq.
Since it's just a kernel panic, rebuilding kernel rpm to reproduce 
is
enough.

Note: parameter crashkernel can be adjusted if there was no vmcore
produced.

--
Su

> If it's faster, I can also get any developer access to the VM...