Re: [PATCH]sched: Isochronous class v2 for unprivileged soft rtscheduling

[Lee Revell]

On Thu, 2005-01-20 at 12:49 -0500, ross@xxxxxxxxxxxx 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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