Re: [patch 1/2] ufd v1 - unsequential O(1) fdmap core

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On Mon, 4 Jun 2007 10:09:41 +0200 Ingo Molnar <[email protected]> wrote:

> 
> * Ingo Molnar <[email protected]> wrote:
> 
> > i think this sums it up:
> > 
> >  http://www.uwsg.iu.edu/hypermail/linux/kernel/0705.3/2490.html
> 
> i mean this mail started it:
> 
>   http://linux.derkeiler.com/Mailing-Lists/Kernel/2007-05/msg13070.html
> 
> > and some more, with a benchmark as well:
> > 
> >  http://linux.derkeiler.com/Mailing-Lists/Kernel/2007-05/msg13685.html
> 

Yeah, I remember all that but I don't think it provides a suitable
description of what all this code is there for - what problem it is
solving and how it solves it.

If we just want some pseudo-private fd space for glibc to use then I'd have
thought that the existing code could be tweaked to do that: top-down
allocation, start at some high offset, etc.  But apparently there's more
to it than this.


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