linux-kernel - Re: [PATCH 0/4] S390: Fine-tuning for six function implementations

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Message-ID: <51ba03f7-d1d8-8064-7dee-b5a910ad47de@oracle.com>
Date:   Tue, 9 May 2017 10:04:57 +0200
From:   Vegard Nossum <vegard.nossum@...cle.com>
To:     SF Markus Elfring <elfring@...rs.sourceforge.net>,
        linux-s390@...r.kernel.org,
        Christian Bornträger <borntraeger@...ibm.com>,
        Heiko Carstens <heiko.carstens@...ibm.com>,
        Ingo Molnar <mingo@...nel.org>,
        Martin Schwidefsky <schwidefsky@...ibm.com>,
        Paul Gortmaker <paul.gortmaker@...driver.com>,
        Peter Oberparleiter <oberpar@...ux.vnet.ibm.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Sascha Silbe <silbe@...ux.vnet.ibm.com>,
        Viktor Mihajlovski <mihajlov@...ux.vnet.ibm.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: Re: [PATCH 0/4] S390: Fine-tuning for six function implementations

On 05/07/17 19:12, SF Markus Elfring wrote:
> From: Markus Elfring <elfring@...rs.sourceforge.net>
> Date: Sun, 7 May 2017 19:00:09 +0200
>
> A few update suggestions were taken into account
> from static source code analysis.
>
> Markus Elfring (4):
>   Combine two function calls into one in show_cacheinfo()
>   Use seq_putc() in show_cpu_summary()
>   Replace six seq_printf() calls by seq_puts()
>   Combine two function calls into one at four places
>
>  arch/s390/kernel/cache.c     |  4 ++--
>  arch/s390/kernel/processor.c |  2 +-
>  arch/s390/kernel/sysinfo.c   | 25 +++++++++++--------------
>  3 files changed, 14 insertions(+), 17 deletions(-)
>

I'm sorry, I wouldn't normally respond to this, but I was put on the Cc
after all so I'll give my feedback.

I think these patches are a waste of time and a resources.

It would be different if your patches fixed actual bugs. This is just
mindless code transformations that MAY in the best case save a few bytes
of code here and there (I don't know; you didn't say).

But the potential gains from these incredibly numerous and tiny patches
that don't fix anything are so small, it's a waste of time, bandwidth,
and mental capacity for you and for everybody involved.

I just searched my inbox for patches from you and you sent literally
_hundreds_ over the past few days, all doing this crazy printf/puts/putc
transformation.

Another bit of searching and I see that I'm not the first one giving you
this response:

https://lkml.org/lkml/2017/1/23/383 - Jens Axboe
https://lkml.org/lkml/2017/1/23/262 - Johannes Thumshirn
https://lkml.org/lkml/2017/1/12/513 - Cyrille Pitchen
https://lkml.org/lkml/2016/10/24/491 - Theodore Ts'o
https://lkml.org/lkml/2016/10/7/148 - Dan Carpenter
https://lkml.org/lkml/2016/9/14/58 - Christian Borntraeger

...and I'm sure there are many more.

Vegard