linux-kernel - Re: [PATCH 0/9] Refactoring exit

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Date:   Tue, 29 Jun 2021 08:13:32 +1200
From:   Michael Schmitz <schmitzmic@...il.com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     Al Viro <viro@...iv.linux.org.uk>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        linux-arch <linux-arch@...r.kernel.org>,
        Jens Axboe <axboe@...nel.dk>, Oleg Nesterov <oleg@...hat.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Richard Henderson <rth@...ddle.net>,
        Ivan Kokshaysky <ink@...assic.park.msu.ru>,
        Matt Turner <mattst88@...il.com>,
        alpha <linux-alpha@...r.kernel.org>,
        linux-m68k <linux-m68k@...ts.linux-m68k.org>,
        Arnd Bergmann <arnd@...nel.org>, Tejun Heo <tj@...nel.org>,
        Kees Cook <keescook@...omium.org>
Subject: Re: [PATCH 0/9] Refactoring exit

Hi Geert,

On 29/06/21 7:17 am, Geert Uytterhoeven wrote:
>>> The warning is printed when using filesys-ELF-2.0.x-1400K-2.gz,
>>> which is a very old ramdisk from right after the m68k a.out to ELF
>>> transition:
>>>
>>>      warning: process `update' used the obsolete bdflush system call
>>>      Fix your initscripts?
>>>
>>> I still boot it, once in a while.
>> OK; you take the cake. That ramdisk came to mind when I thought about
>> where I'd last seen bdflush, but I've not used it in ages (not sure 14
>> MB are enough for that).
> Of course it will work on your 14 MiB machine!  It fits on a floppy, _after_
> decompression.  It was used by people to install Linux on the hard disks
> of their beefy m68k machines, after they had set up the family Christmas
> tree, in December 1996.
Been there, done that. Wrote the HOWTO for ext2 filesystem byte-swapping.
> I also have a slightly larger one, built from OpenWRT when I did my first
> experiments on that.  Unlike filesys-ELF-2.0.x-1400K-2.gz, it does open
> a shell on the serial console, so it is more useful to me.
>
>> The question then is - will bdflush fail gracefully, or spin retrying
>> the syscall?
> Will add to my todo list...
> BTW, you can boot this ramdisk on ARAnyM, too.

True. I can't find that ramdisk image anywhere - if you can point me to 
some archive, I'll give that a try.

Cheers,

     Michael


>
> Gr{oetje,eeting}s,
>
>                          Geert
>