netdev - Re: [PATCH v7 00/11] extend task comm from 16 to 24

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Message-ID: <20211101120636.3cfc5afa@gandalf.local.home>
Date:   Mon, 1 Nov 2021 12:06:36 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Petr Mladek <pmladek@...e.com>
Cc:     Yafang Shao <laoar.shao@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Kees Cook <keescook@...omium.org>,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Al Viro <viro@...iv.linux.org.uk>,
        Valentin Schneider <valentin.schneider@....com>,
        Qiang Zhang <qiang.zhang@...driver.com>,
        robdclark <robdclark@...omium.org>,
        christian <christian@...uner.io>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Ingo Molnar <mingo@...hat.com>,
        Juri Lelli <juri.lelli@...hat.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        David Miller <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>, Martin Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        john fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>,
        dennis.dalessandro@...nelisnetworks.com,
        mike.marciniszyn@...nelisnetworks.com, dledford@...hat.com,
        jgg@...pe.ca, linux-rdma@...r.kernel.org,
        netdev <netdev@...r.kernel.org>, bpf <bpf@...r.kernel.org>,
        "linux-perf-use." <linux-perf-users@...r.kernel.org>,
        linux-fsdevel@...r.kernel.org, Linux MM <linux-mm@...ck.org>,
        LKML <linux-kernel@...r.kernel.org>,
        kernel test robot <oliver.sang@...el.com>,
        kbuild test robot <lkp@...el.com>
Subject: Re: [PATCH v7 00/11] extend task comm from 16 to 24

On Mon, 1 Nov 2021 17:02:12 +0100
Petr Mladek <pmladek@...e.com> wrote:

> > I thought Steven[1] and  Kees[2] have already clearly explained why we
> > do it like that, so I didn't give any more words on it.
> > 
> > [1]. https://lore.kernel.org/all/20211025170503.59830a43@gandalf.local.home/  
> 
> Steven was against switching task->comm[16] into a dynamically
> allocated pointer. But he was not against storing longer names
> separately.

Just to be clear. I was recommending that the comm[16] would still behave
like it does today. Where it is truncated. But if the name is longer, it
could be stored in a separate location if the caller wanted to know the
full name.

-- Steve