Re: [PATCH for-next v2] RDMA/cma: Replace RMW with atomic bit-ops

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> On 21 Jun 2021, at 17:12, Jason Gunthorpe <jgg@xxxxxxxxxx> wrote:
> 
> On Mon, Jun 21, 2021 at 02:58:46PM +0000, Haakon Bugge wrote:
>> 
>> 
>>> On 21 Jun 2021, at 16:37, Jason Gunthorpe <jgg@xxxxxxxxxx> wrote:
>>> 
>>> On Mon, Jun 21, 2021 at 10:46:26AM +0000, Haakon Bugge wrote:
>>> 
>>>>>> You're running an old checkpatch. Since commit bdc48fa11e46 ("checkpatch/coding-style: deprecate 80-column warning"), the default line-length is 100. As Linus states in:
>>>>>> 
>>>>>> https://lkml.org/lkml/2009/12/17/229
>>>>>> 
>>>>>> "... But 80 characters is causing too many idiotic changes."
>>>>> 
>>>>> I'm aware of that thread, but RDMA subsystem continues to use 80 symbols limit.
>>>> 
>>>> I wasn't aware. Where is that documented? Further, it must be a
>>>> limit that is not enforced. Of the last 100 commits in
>>>> drivers/infiniband, there are 630 lines longer than 80.
>>> 
>>> Linus said stick to 80 but use your best judgement if going past
>>> 
>>> It was not a blanket allowance to needless long lines all over the
>>> place.
>> 
>> That is not how I interpreted him:
> 
> There was a much newer thread on this from Linus, 2009 is really old

Yes, from last year, lkml.org/lkml/2020/5/29/1038

<quote>
Excessive line breaks are BAD. They cause real and every-day problems.

They cause problems for things like "grep" both in the patterns and in
the output, since grep (and a lot of other very basic unix utilities)
is fundamentally line-based.

So the fact is, many of us have long long since skipped the whole
"80-column terminal" model, for the same reason that we have many more
lines than 25 lines visible at a time.

And honestly, I don't want to see patches that make the kernel reading
experience worse for me and likely for the vast majority of people,
based on the argument that some odd people have small terminal
windows.
</quote>

Occasionally enforcing 80-chars line lengths in the RDMA subsystem seems like a strange policy to me :-)


Thxs, Håkon


> 
> Jason





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