Re: [PATCH] deadline io scheduler

Pavel Machek
2002-10-01T22:32:39Z

Hi!

> Due to recent "problems" (well the vm being just too damn good at keep
> disks busy these days), it's become even more apparent that our current
> io scheduler just cannot cope with some work loads. Repeated starvartion
> of reads is the most important one. The Andrew Morton Interactive
> Workload (AMIW) [1] rates the current kernel poorly, on my test machine
> it completes in 1-2 minutes depending on your luck. 2.5.38-BK does a lot
> better, but mainly because it's being extremely unfair. This deadline io
> scheduler finishes the AMIW in anywhere from ~0.5 seconds to ~3-4
> seconds, depending on the io load.

would it be possible to make deadlines per-process to introduce ionice?

ionice -n -5 mpg123 foo.mp3
ionice make

? Pavel

--
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