[vdr] Re: Recordings menu sluggish - *the real* solution. :-)

[Michael Hoffmann <linux@f-j-hoffmann.de>]

Am Sonntag, 5. Oktober 2003 23:35 schrieben Sie:
> Stefan Huelswitt wrote:
> ...
>
> > What a pitty we all have to patch the kernel to use this...
>
> Yes. That's a big disadvantage.
> I have SuSE's 2.4.20 installed on my vdr and I would not even want to
> try to install the O_STREAMING patch.
> O_DIRECT, on the other hand is pretty standard. For example, it also
> exists in IRIX.
>
> The advantage of O_STREAMING is that the required patch to vdr is trivial.

There is another alternative called posix_fadvise, see man posix_fadvise

DESCRIPTION
Programs  can  use posix_fadvise to announce an intention to access file data 
in a specific pattern in the future, thus allowing the kernel to per      
form appropriate optimisations.

This looks very good, but this funktion does not work with Linux 2.4.x :-(((
http://www.ussg.iu.edu/hypermail/linux/kernel/0210.1/0978.html

But it should be fixed in Linux 2.6:
http://kt.zork.net/kernel-traffic/kt20030117_201.html#16

Michael



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