Messages in this thread | | | Date | Mon, 11 Feb 2002 12:02:27 -0600 | From | kelley eicher <> | Subject | scsi abort 0x2002 and eth0: too much work on a dual amd 760mpx system |
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i'm having some problems with the 2.4.17 linux kernel on a dual athlon system that i was hoping someone could shed some light on. there seem to be multiple problems so i'm not quite sure which path to follow at this point.
the scenario is that i have a system with the following hardware:
# awk '/\(/' /proc/pci Host bridge: PCI device 1022:700c (Advanced Micro Devices [AMD]) (rev 17). PCI bridge: PCI device 1022:700d (Advanced Micro Devices [AMD]) (rev 0). ISA bridge: Advanced Micro Devices [AMD] AMD-768 [??] ISA (rev 4). IDE interface: Advanced Micro Devices [AMD] AMD-768 [??] IDE (rev 4). Bridge: Advanced Micro Devices [AMD] AMD-768 [??] ACPI (rev 3). SCSI storage controller: Adaptec 7892A (rev 2). PCI bridge: Advanced Micro Devices [AMD] AMD-768 [??] PCI (rev 4). VGA compatible controller: Matrox Graphics, Inc. MGA G400 AGP (rev 133). Ethernet controller: 3Com Corporation 3c905C-TX [Fast Etherlink] (rev 116).
while this machine is at work i see aic7xxx_abort errors in dmesg from time to time during heavy i/o. interestingly, this does not crash the machine or the devices in question but recovers with an aic7xxx_dev_reset instruction after 1-2 minutes of abort attempts.
during the time between the apparent scsi failures i see a few error messages in the form of 'eth0: Too much work in interrupt, status e401.'
looking at /proc/interrupts i see that indeed, the eth0 device is hard at work.
# cat /proc/interrupts CPU0 CPU1 0: 33669019 33490567 IO-APIC-edge timer 1: 19117 19797 IO-APIC-edge keyboard 2: 0 0 XT-PIC cascade 10: 32635348 32632811 IO-APIC-level eth0 11: 381721 381874 IO-APIC-level aic7xxx 14: 236054 249997 IO-APIC-edge ide0 15: 0 6 IO-APIC-edge ide1 NMI: 0 0 LOC: 67153036 67153815 ERR: 0 MIS: 32
i have researched the 'eth0: Too much work in interrupt, status e401.' a bit and found that it is possible to increase the threshold for which these errors will be printed. i did not attempt this because it does not seem that it should be a solution to this problem but more of a crutch. i.e. bad things still happen, you just don't see them.
another reason i refrained from making any adjustments to settings for the driver is that i have an almost identical system in a very similar load and role that exhibits *none* of the problems mentioned.
# awk '/\)/' /proc/pci Host bridge: PCI device 1022:700c (Advanced Micro Devices [AMD]) (rev 17). PCI bridge: PCI device 1022:700d (Advanced Micro Devices [AMD]) (rev 0). ISA bridge: Advanced Micro Devices [AMD] AMD-765 [Viper] ISA (rev 2). IDE interface: Advanced Micro Devices [AMD] AMD-765 [Viper] IDE (rev 1). Bridge: Advanced Micro Devices [AMD] AMD-765 [Viper] ACPI (rev 1). USB Controller: Advanced Micro Devices [AMD] AMD-765 [Viper] USB (rev 7). SCSI storage controller: Adaptec 7892A (rev 2). SCSI storage controller: Adaptec 7892A (#2) (rev 2). Ethernet controller: 3Com Corporation 3c905C-TX [Fast Etherlink] (rev 116). VGA compatible controller: nVidia Corporation Riva TnT2 [NV5] (rev 17).
this second machine runs an identical 2.4.17 kernel to that of the first.
the most significant difference i see here is that the chipset is the amd 760mp rather than 760mpx which is purely a supposed improvement to the south bridge 765->768.
so before i go tearing machines apart in hopes of debugging which piece of hardware is the cause of this less than optimal behavior, would anyone care to wager what the cause is?
-kelley
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