> I have set aside some time on the server (normally a busy > production-type > server) to try a few different configs (SHED_ULE instead of SHED_4BSD, > turning off apic, removing polling) to see if any of them > will have any > impact. I have just tried a number of different combinations of sheduler, acpi, apic, polling, ... No matter what I do, the only way to prevent errors like the one below seems to be to run with preemption turned off. Interrupt storm detected on "irq20: atapci4"; throttling interrupt source ad20: FAILURE - already active DMA on this device ad20: setting up DMA failed See my recent mail on this list entitled "Kernel preemption leads to SATA instability (how to debug?)" for machine configuration and further information. /Daniel ErikssonReceived on Tue Jul 20 2004 - 04:49:39 UTC
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