linux-kernel - Re: [v3 2/3] coccinelle: api: extend memdup_user rule with vmemdup

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Message-ID: <alpine.DEB.2.22.394.2007220823050.2918@hadrien>
Date:   Wed, 22 Jul 2020 08:24:22 +0200 (CEST)
From:   Julia Lawall <julia.lawall@...ia.fr>
To:     Markus Elfring <Markus.Elfring@....de>
cc:     Denis Efremov <efremov@...ux.com>,
        Coccinelle <cocci@...teme.lip6.fr>,
        Gilles Muller <Gilles.Muller@...6.fr>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        Nicolas Palix <nicolas.palix@...g.fr>,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: Re: [v3 2/3] coccinelle: api: extend memdup_user rule with
 vmemdup_user()



On Wed, 22 Jul 2020, Markus Elfring wrote:

> > Markus, you are welcome to try this since you are concerned about it.
>
> I dare to point software design variations for some reasons.
>
>
> > But it doesn't matter.
>
> Under which circumstances would you begin to care more for involved differences
> in corresponding run time characteristics?

When the difference is hours vs seconds.  In this case, there are
tradeoffs between the two options, andI don't know which would be faster,
but I think it is extremely unlikely that the difference is noticible.
But if you are concerned about it, you are welcome to try.

julia