I get the following messages under heavy disk load. Might also be worth
noting that interrupt rate is around 10,000 interrupts/s during heavy disk
IO.
The marketing name for the disks is "Seagate Barracuda IV" the system is
2x 2.0GHz xeon. Interestingly i have the noirqbalance parameter on, that
probably also needs looking into. Not to mention that the MIS line is
incrementing at a steady pace in step with the ide interrupts.
CPU0 CPU1 CPU2 CPU3
0: 2562053 0 0 0 IO-APIC-edge timer
1: 8212 0 0 0 IO-APIC-edge i8042
2: 0 0 0 0 XT-PIC cascade
3: 1 0 0 0 IO-APIC-edge serial
4: 1 0 0 0 IO-APIC-edge serial
8: 1 0 0 0 IO-APIC-edge rtc
9: 0 0 0 0 IO-APIC-level acpi
12: 49138 0 0 0 IO-APIC-edge i8042
14: 49135 0 0 0 IO-APIC-edge ide0
15: 10 0 0 0 IO-APIC-edge ide1
16: 594 0 0 0 IO-APIC-level uhci_hcd
17: 16 0 0 0 IO-APIC-level serial
19: 31549 0 0 0 IO-APIC-level aic7xxx, uhci_hcd
20: 6665 0 0 0 IO-APIC-level eth0
22: 16324115 21836 48031 42905 IO-APIC-level ide2, ide3
23: 6 0 0 0 IO-APIC-level eth1
48: 113434 0 0 0 IO-APIC-level EMU10K1
NMI: 0 0 0 0
LOC: 2562342 2574744 2583077 2583076
ERR: 0
MIS: 112774
04:06.0 RAID bus controller: Promise Technology, Inc. 20267 (rev 02)
PDC20267: IDE controller at PCI slot 0000:04:06.0
PDC20267: chipset revision 2
PDC20267: 100% native mode on irq 22
PDC20267: (U)DMA Burst Bit ENABLED Primary MASTER Mode Secondary MASTER
Mode.
ide2: BM-DMA at 0x8880-0x8887, BIOS settings: hde:pio, hdf:pio
ide3: BM-DMA at 0x8888-0x888f, BIOS settings: hdg:pio, hdh:pio
hde: ST340014A, ATA DISK drive
ide2 at 0x8c08-0x8c0f,0x88fe on irq 22
hdg: ST340014A, ATA DISK drive
ide3 at 0x8c00-0x8c07,0x88fa on irq 22
...
hdg: dma_timer_expiry: dma status == 0x20
hdg: DMA timeout retry
PDC202XX: Secondary channel reset.
PDC202XX: Primary channel reset.
hdg: timeout waiting for DMA
hde: dma_timer_expiry: dma status == 0x20
hde: DMA timeout retry
PDC202XX: Primary channel reset.
PDC202XX: Secondary channel reset.
hde: timeout waiting for DMA
hdg: dma_timer_expiry: dma status == 0x20
hdg: DMA timeout retry
PDC202XX: Secondary channel reset.
PDC202XX: Primary channel reset.
hdg: timeout waiting for DMA
hde: dma_timer_expiry: dma status == 0x20
hde: DMA timeout retry
PDC202XX: Primary channel reset.
hdg: dma_timer_expiry: dma status == 0x20
hdg: DMA timeout retry
PDC202XX: Secondary channel reset.
PDC202XX: Secondary channel reset.
hde: timeout waiting for DMA
PDC202XX: Primary channel reset.
hdg: timeout waiting for DMA
blk: queue c17b9400, I/O limit 4095Mb (mask 0xffffffff)
blk: queue c17aec00, I/O limit 4095Mb (mask 0xffffffff)
hdg: dma_timer_expiry: dma status == 0x21
hdg: DMA timeout error
hdg: dma timeout error: status=0x58 { DriveReady SeekComplete DataRequest
}
hdg: status error: status=0x50 { DriveReady SeekComplete }
hdg: no DRQ after issuing MULTWRITE_EXT
hdg: status timeout: status=0xd0 { Busy }
PDC202XX: Secondary channel reset.
PDC202XX: Primary channel reset.
hdg: no DRQ after issuing MULTWRITE_EXT
ide3: reset: master: error (0x00?)