Messages in this thread | | | Subject | Re: [PATCH]sched: Isochronous class v2 for unprivileged soft rt scheduling | From | Lee Revell <> | Date | Thu, 20 Jan 2005 14:07:48 -0500 |
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On Thu, 2005-01-20 at 12:49 -0500, ross@lug.udel.edu wrote: > It's been a long while since I followed ReiserFS development closely, > *however*, this issue used to be a common problem ReiserFS - when > free space starts to drop below 10%, performace takes a big hit. So > performance improved when space was cleared up. >
To be fair to Reiserfs, many UNIX filesystems have done this on purpose, all the way back to FFS I think. Once free space drops below 10%, they change their allocation scheme to favor efficiency over speed. Probably this behavior doesn't make sense on a 120GB disk with 11GB free. But it certainly does on a 300MB disk when you get down to 30 ;-)
Lee
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