Messages in this thread | | | Date | Sun, 6 Feb 2000 16:31:34 +0100 | From | Gabriele Turchi <> | Subject | Re: 2.2.15pre5, IDE and Athlon problem(s) |
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On Sat, Feb 05, 2000 at 11:39:42PM -0500, Mark Hahn wrote: > > > dd if=/dev/zero of=/home/1 bs=1024k & > > which is the moral equivalent to a fork-bomb: it generates an overwhelming > stream of requests to the same region of disk.
Ehm, a simple mkisofs does a similar thing...
> > > It's probably a problem with the elevator sorting in > > ll_rw_blk. I'm thinking this because the exact same > > test doesn't give any performance hit at all on my > > SCSI system... > > I think it's merely a fairness issue with allocating request blocks; > elevator sorting should be fine, since it's c-scan. this isn't an issue > for scsi because we punt all scheduling to the disk (not always a win...) > > regards, mark hahn.
I've installed Andrea's "elevator-starvation-2" patch, and was fine. Interactive response is much better, apparently without performance losses.
Best wishes,
Gabriele Turchi
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