Messages in this thread | | | Date | Sun, 22 Apr 2007 16:24:47 -0700 (PDT) | From | Linus Torvalds <> | Subject | Re: [REPORT] cfs-v4 vs sd-0.44 |
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On Sun, 22 Apr 2007, Juliusz Chroboczek wrote: > > Why not do it in the X server itself? This will avoid controversial > policy in the kernel, and have the added advantage of working with > X servers that don't directly access hardware.
It's wrong *wherever* you do it.
The X server should not be re-niced. It was done in the past, and it was wrogn then (and caused problems - we had to tell people to undo it, because some distros had started doing it by default).
If you have a single client, the X server is *not* more important than the client, and indeed, renicing the X server causes bad patterns: just because the client sends a request does not mean that the X server should immediately be given the CPU as being "more important".
In other words, the things that make it important that the X server _can_ get CPU time if needed are all totally different from the X server being "more important". The X server is more important only in the presense of multiple clients, not on its own! Needing to renice it is a hack for a bad scheduler, and shows that somebody doesn't understand the problem!
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