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Is it possible to set up some sort of default process and IO priority for given application/executable? I am thinking some sort of FS extended attribute or loadable "policy" of sort?

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    What's wrong with nice -19 ionice -c 3 command?
    – FloHimself
    Apr 20, 2015 at 7:30
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    @FloHimself I think @wilx is asking for some way of having the system automatically apply prorities to an executable whenever it is launched, without having to use nice or ionice every time.
    – Stephen Kitt
    Apr 20, 2015 at 8:13
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    @FloHimself: Yes, I want the policy to be automatically applied exactly like Stephen Kitt suggests.
    – wilx
    Apr 20, 2015 at 8:29
  • The question should be expanded with some more background information. Why should this be done? What's the special use case?
    – FloHimself
    Apr 20, 2015 at 11:04

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The usual approach is to create a wrapper script.

Create a script /usr/local/bin/nicer:

#!/bin/sh
exec ionice -c3 nice /usr/bin/"${0##*/}" "$@"

Create symbolic links for each executable that you want to execute through this wrapper, e.g.

ln -s nicer /usr/local/bin/myprogram

Then when you run myprogram, it will execute the script /usr/local/bin/myprogram, which runs /usr/bin/myprogram with lower priorities.

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