Re: Linux responsiveness under heavy load

From: Andrea Arcangeli (andrea@suse.de)
Date: Thu Mar 09 2000 - 10:05:48 EST


On 9 Mar 2000, Andi Kleen wrote:

>Actually some SCSI controllers (especially intelligent ones like Mylex
>or GDT) seem to spin a potentially long time queueing packets with
>interrupts off to the SCSI adapter. See all the "TLB IPI timeout" problems

Nicolas said the disk is connected using UDMA/33 on a BE6-2 MB so I
excluded the evil clied-scsi-loops. In the first case (where there's no
swapout going on), it's more likely to be elevator starvation.

Andrea

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