linux-kernel - Re: [PATCH v2 00/14] sysctl: Add a size argument to register functions in sysctl

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Date:   Tue, 1 Aug 2023 12:01:09 +0200
From:   Joel Granados <joel.granados@...il.com>
To:     Luis Chamberlain <mcgrof@...nel.org>
Cc:     Catalin Marinas <catalin.marinas@....com>,
        Iurii Zaikin <yzaikin@...gle.com>,
        Jozsef Kadlecsik <kadlec@...filter.org>,
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Subject: Re: [PATCH v2 00/14] sysctl: Add a size argument to register
 functions in sysctl

On Mon, Jul 31, 2023 at 01:50:40PM -0700, Luis Chamberlain wrote:
> On Mon, Jul 31, 2023 at 09:17:14AM +0200, Joel Granados wrote:
> > Why?
> 
> It would be easier to read if the what went before the why.
haha. I totally misunderstood you in
lore.kernel.org/all/ZMFizKFkVxUFtSqa@...badil.infradead.org I thought
you meant to put the why first. I'll switch it back to having the what
first for V3

> 
> > This is a preparation patch set that will make it easier for us to apply
> > subsequent patches that will remove the sentinel element (last empty element)
> > in the ctl_table arrays.
> > 
> > In itself, it does not remove any sentinels but it is needed to bring all the
> > advantages of the removal to fruition which is to help reduce the overall build
> > time size of the kernel and run time memory bloat by about ~64 bytes per
> > sentinel.
> 
> s/sentinel/declared ctl array
> 
> Because the you're suggesting we want to remove the sentinel but we
> want to help the patch reviewer know that a sentil is required per
> declared ctl array.
Ack

> 
> You can also mention here briefly that this helps ensure that future moves of
> sysctl arrays out from kernel/sysctl.c to their own subsystem won't
> penalize in enlarging the kernel build size or run time memory consumption.
I worked it in

Thx for the review
> 
> Thanks for spinning this up again!
> 
>   Luis

-- 

Joel Granados

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