> I ran hdparm -t on my disks and discovered an abysmal drop in hard disk
> performance since 2.5.2-pre1. Yesterday I ran fsck on all disks and it
> took more than three times as much to complete under 2.5.2-pre9 than
> usual. I am running SuSE 6.3, MB is Asus A7v, controller ATA 33 +
> Promise PDC 20265.
> These are the results for a disk, (ATA 100 IBM 307030),for the other
> disks they are pretty the same.
> Resuslts for "hdpam -t /dev/hdg"
> Kernel 2.5.2-pre1 - 35 MB/sec
> Kernel 2.5.2-pre4 - 15 MB/sec
> Kernel 2.5.2-pre9 - 10 MB/sec
> For the rest, it seems pretty stable, but I still get kernel panic on
> cold boots from the AHA 2904 (AIC7850).
> Carlo Scarfoglio
Could be scheduler related. Please try the fresh fix from Davide:
> In sched.c::init_idle() :
> current->dyn_prio = -100;
> Let me know.
For more info, see also the related thread here in LKML:
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