linux-kernel - Re: linux-next: boottime warning from todays linux-next

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Message-ID: <CAA5qM4BKwS9W5UCbnfo_xSTJKBuUEyNzUrg0UfGhoxWK5WK3RQ@mail.gmail.com>
Date:   Thu, 10 Feb 2022 15:35:30 -0800
From:   Tong Zhang <ztong0001@...il.com>
To:     Stephen Rothwell <sfr@...b.auug.org.au>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Domenico Andreoli <domenico.andreoli@...ux.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Luis Chamberlain <mcgrof@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>
Subject: Re: linux-next: boottime warning from todays linux-next

On Wed, Feb 9, 2022 at 11:43 PM Stephen Rothwell <sfr@...b.auug.org.au> wrote:
>
> Hi all,
>
> My qemu boot of a powerpc pseries_le_defconfig kernel produced these
> kernel messages:
>
>   CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.17.0-rc3 #2
>   Call Trace:
>   [c0000000073e3a80] [c0000000007bfd40] dump_stack_lvl+0x74/0xa8 (unreliable)
>   [c0000000073e3ac0] [c00000000057e3dc] __register_sysctl_table+0x60c/0x9f0
>   [c0000000073e3bd0] [c000000002041170] init_fs_stat_sysctls+0x48/0x60
>   [c0000000073e3bf0] [c000000000012110] do_one_initcall+0x60/0x2d0
>   [c0000000073e3cd0] [c0000000020049f0] kernel_init_freeable+0x334/0x3dc
>   [c0000000073e3db0] [c000000000012710] kernel_init+0x30/0x1a0
>   [c0000000073e3e10] [c00000000000cd64] ret_from_kernel_thread+0x5c/0x64
>
> Presumably introduced by commit
>
>   b42bc9a3c511 ("Fix regression due to "fs: move binfmt_misc sysctl to its own file"")
>
> --
> Cheers,
> Stephen Rothwell

Hi Stephen,
I am trying to see if I can reproduce this.
Could you share the QEMU command line and pseries_le_defconfig?
Latest kernel does not have pseries_le_defconfig so I assume you have
your own version.
Thanks!
- Tong