2.5.2-pre9 - HD performance degradation
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
Quoted 7 lines · Carl Scarfoglio
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.
Quoted 8 lines
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:
Quoted 5 lines
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
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