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From:   Yafang Shao <laoar.shao@gmail.com>
Date:   Thu, 14 Oct 2021 21:11:34 +0800
Message-ID: <CALOAHbBTxLvuiuT4tT2_7C+jaXBoh0uTjzLRm+njO4tKxCtPwg@mail.gmail.com>
Subject: Re: [sched.h] 317419b91e: perf-sanity-tests.Parse_sched_tracepoints_fields.fail
To:     Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc:     acme <acme@kernel.org>, rostedt <rostedt@goodmis.org>,
        kernel test robot <oliver.sang@intel.com>,
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On Thu, Oct 14, 2021 at 9:09 PM Mathieu Desnoyers
<mathieu.desnoyers@efficios.com> wrote:
>
> ----- On Oct 14, 2021, at 9:05 AM, Yafang Shao laoar.shao@gmail.com wrote:
> [...]
> >> If it happens that this ABI break is noticed by more than an in-tree test
> >> program, then
> >> the kernel's ABI rules will require that this trace field size stays unchanged.
> >> This brings
> >> up once more the whole topic of "Tracepoints ABI" which has been discussed
> >> repeatedly in
> >> the past.
> >>
> >
> > I will check if any other in-tree tools depends on TASK_COMM_LEN.
>
> That's a start, but given this is a userspace ABI, out-of-tree userland
> tools which depend of this to be fixed-size are also relevant.
>

TASK_COMM_LEN isn't defined in include/uapi/ directory, so it seems
that it isn't the uerspace ABI?


-- 
Thanks
Yafang