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).
Cheers,
Carlo Scarfoglio
On Mon, 7 Jan 2002, Carl Scarfoglio wrote:
> 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).
> Cheers,
> 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:
http://marc.theaimsgroup.com/?t=101019244200001&r=1&w=2&n=12
Matze