linux-kernel - Re: [PATCH 1/2 v2] fdmap(2)

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Date:   Wed, 25 Oct 2017 15:48:00 +0200
From:   Pavel Machek <pavel@....cz>
To:     Alexey Dobriyan <adobriyan@...il.com>
Cc:     "Michael Kerrisk (man-pages)" <mtk.manpages@...il.com>,
        akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
        linux-api@...r.kernel.org, rdunlap@...radead.org,
        tglx@...utronix.de, tixxdz@...il.com, gladkov.alexey@...il.com,
        Aliaksandr Patseyenak <Aliaksandr_Patseyenak1@...m.com>
Subject: Re: [PATCH 1/2 v2] fdmap(2)

On Wed 2017-10-25 14:45:31, Alexey Dobriyan wrote:
> On 10/23/17, Pavel Machek <pavel@....cz> wrote:
> 
> > Binary fdmap looks... quite ugly to me. But close_all(from, to)
> > syscall kindof makes sense to me... and is not that ugly.
> >
> > Given that openbsd has something similar... perhaps we can take that?
> 
> closefrom() can be implemented on top of fdmap().
> fdmap as is is useful for other purposes.

fdmap can be implemented on top of open('/dev/kmem').
open('/dev/kmem') as is is useful for other purposes.

Yes, fdmap is more powerful. No, that does not mean it is better idea.
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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