kern/51982: [sio] sio1: interrupt-level buffer overflows

Fri Mar 3 06:10:07 PST 2006

The following reply was made to PR kern/51982; it has been noted by GNATS.

From: Mike Tancsa <mike at sentex.net>
To: bug-followup at FreeBSD.org, ianf at za.uu.net
Cc:  
Subject: Re: kern/51982: [sio] sio1: interrupt-level buffer overflows
Date: Fri, 03 Mar 2006 09:01:48 -0500

 Setting
 cp4ticks = speed / 10 / hz * 40;

 Fixes the problem for me as well on my boxes using a 3com modem. 
 Without the change, its a constant series of

 sio4: 1 more interrupt-level buffer overflow (total 3501)

 sio4: 3 more interrupt-level buffer overflows (total 3504)

 sio4: 1 more interrupt-level buffer overflow (total 3505)

 sio4: 1 more interrupt-level buffer overflow (total 3506)

 sio4: 2 more interrupt-level buffer overflows (total 3508)

 sio4: 2 more interrupt-level buffer overflows (total 3510)

 sio4: 8 more interrupt-level buffer overflows (total 3518)

 sio4: 11 more interrupt-level buffer overflows (total 3529)

 sio4: 1 more interrupt-level buffer overflow (total 3530)

 sio4: 16 more interrupt-level buffer overflows (total 3546)

 sio4: 10 more interrupt-level buffer overflows (total 3556)

 sio4: 16 more interrupt-level buffer overflows (total 3572)

 sio4: 4 more interrupt-level buffer overflows (total 3576)

 sio4: 16 more interrupt-level buffer overflows (total 3592)

 sio4: 1 more interrupt-level buffer overflow (total 3593)

 sio4: 3 more interrupt-level buffer overflows (total 3596)

 while doing a file transfer over the dialup connection at 42Kb/s

 Copyright (c) 1992-2006 The FreeBSD Project.

 Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994

          The Regents of the University of California. All rights reserved.

 FreeBSD 6.1-PRERELEASE #1: Thu Mar  2 23:41:19 EST 2006

      root at test.sentex.ca:/usr/obj/usr/src/sys/gas

 Timecounter "i8254" frequency 1193182 Hz quality 0

 CPU: VIA C3 Nehemiah+RNG+ACE (796.77-MHz 686-class CPU)

    Origin = "CentaurHauls"  Id = 0x698  Stepping = 8

    Features=0x381b03f<FPU,VME,DE,PSE,TSC,MSR,MTRR,PGE,CMOV,PAT,MMX,FXSR,SSE>

 real memory  = 232718336 (221 MB)

 avail memory = 218222592 (208 MB)

 npx0: [FAST]

 npx0: <math processor> on motherboard

 npx0: INT 16 interface

 acpi0: <CM400 AWRDACPI> on motherboard

 acpi0: Power Button (fixed)

 Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000

 acpi_timer0: <24-bit timer at 3.579545MHz> port 0x408-0x40b on acpi0

 cpu0: <ACPI CPU> on acpi0

 acpi_button0: <Power Button> on acpi0

 acpi_button1: <Sleep Button> on acpi0

 pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0

 pci0: <ACPI PCI bus> on pcib0

 agp0: <VIA PM800/PN800/PM880/PN880 host to PCI bridge> mem 
 0xf8000000-0xf9ffffff at device 0.0 on pci0

 pcib1: <PCI-PCI bridge> at device 1.0 on pci0

 pci1: <PCI bus> on pcib1

 pci1: <display, VGA> at device 0.0 (no driver attached)

 puc0: <US Robotics (3Com) 3CP5609 PCI 16550 Modem> port 0xe700-0xe707 
 irq 7 at device 8.0 on pci0

 sio4: <US Robotics (3Com) 3CP5609 PCI 16550 Modem> on puc0

 sio4: type 16550A

 sio4: unable to activate interrupt in fast mode - using normal mode

 rl0: <RealTek 8139 10/100BaseTX> port 0xd000-0xd0ff mem 
 0xfc000000-0xfc0000ff irq 12 at device 10.0 on pci0

 miibus0: <MII bus> on rl0

 rlphy0: <RealTek internal media interface> on miibus0

 rlphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto

 rl0: Ethernet address: 00:03:1d:02:0b:fd

 pci0: <serial bus, FireWire> at device 11.0 (no driver attached)

 atapci0: <VIA 6420 SATA150 controller> port 
 0xee00-0xee07,0xef00-0xef03,0xe400-0xe407,0xe500-0xe503,0xe600-0xe60f,0xd400-0xd4ff 
 irq 12 at device 15.0 on pci0

 ata2: <ATA channel 0> on atapci0

 ata3: <ATA channel 1> on atapci0

 atapci1: <VIA 8237 UDMA133 controller> port 
 0x1f0-0x1f7,0x3f6,0x170-0x177,0x376,0xe800-0xe80f at device 15.1 on pci0

 ata0: <ATA channel 0> on atapci1

 ata1: <ATA channel 1> on atapci1

 uhci0: <VIA 83C572 USB controller> port 0xe900-0xe91f irq 7 at device 
 16.0 on pci0

 uhci0: [GIANT-LOCKED]

 usb0: <VIA 83C572 USB controller> on uhci0

 usb0: USB revision 1.0

 uhub0: VIA UHCI root hub, class 9/0, rev 1.00/1.00, addr 1

 uhub0: 2 ports with 2 removable, self powered

 uhci1: <VIA 83C572 USB controller> port 0xea00-0xea1f irq 7 at device 
 16.1 on pci0

 uhci1: [GIANT-LOCKED]

 usb1: <VIA 83C572 USB controller> on uhci1

 usb1: USB revision 1.0

 uhub1: VIA UHCI root hub, class 9/0, rev 1.00/1.00, addr 1

 uhub1: 2 ports with 2 removable, self powered

 uhci2: <VIA 83C572 USB controller> port 0xeb00-0xeb1f irq 12 at 
 device 16.2 on pci0

 uhci2: [GIANT-LOCKED]

 usb2: <VIA 83C572 USB controller> on uhci2

 usb2: USB revision 1.0

 uhub2: VIA UHCI root hub, class 9/0, rev 1.00/1.00, addr 1

 uhub2: 2 ports with 2 removable, self powered

 uhci3: <VIA 83C572 USB controller> port 0xec00-0xec1f irq 12 at 
 device 16.3 on pci0

 uhci3: [GIANT-LOCKED]

 usb3: <VIA 83C572 USB controller> on uhci3

 usb3: USB revision 1.0

 uhub3: VIA UHCI root hub, class 9/0, rev 1.00/1.00, addr 1

 uhub3: 2 ports with 2 removable, self powered

 pci0: <serial bus, USB> at device 16.4 (no driver attached)

 pci0: <network> at device 16.5 (no driver attached)

 isab0: <PCI-ISA bridge> at device 17.0 on pci0

 isa0: <ISA bus> on isab0

 pci0: <multimedia, audio> at device 17.5 (no driver attached)

 vr0: <VIA VT6102 Rhine II 10/100BaseTX> port 0xe000-0xe0ff mem 
 0xfc004000-0xfc0040ff irq 7 at device 18.0 on pci0

 miibus1: <MII bus> on vr0

 ukphy0: <Generic IEEE 802.3u media interface> on miibus1

 ukphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto

 vr0: Ethernet address: 00:03:1d:02:0a:fd

 acpi_tz0: <Thermal Zone> on acpi0

 fdc0: <floppy drive controller> port 0x3f2-0x3f5,0x3f7 irq 6 drq 2 on acpi0

 fdc0: [FAST]

 sio0: <16550A-compatible COM port> port 0x3f8-0x3ff irq 4 flags 0x10 on acpi0

 sio0: type 16550A, console

 sio1: <16550A-compatible COM port> port 0x2f8-0x2ff irq 3 on acpi0

 sio1: type 16550A

 sio2: <16550A-compatible COM port> port 0x3e8-0x3ef irq 5 on acpi0

 sio2: type 16550A

 sio3: <16550A-compatible COM port> port 0x2e8-0x2ef irq 11 on acpi0

 sio3: type 16550A

 atkbdc0: <Keyboard controller (i8042)> port 0x60,0x64 irq 1 on acpi0

 atkbd0: <AT Keyboard> irq 1 on atkbdc0

 kbd0 at atkbd0

 atkbd0: [GIANT-LOCKED]

 sc0: <System console> at flags 0x100 on isa0

 sc0: VGA <16 virtual consoles, flags=0x300>

 vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0

 Timecounter "TSC" frequency 796771027 Hz quality 800

 Timecounters tick every 1.000 msec

 Fast IPsec: Initialized Security Association Processing.

 ipfw2 (+ipv6) initialized, divert loadable, rule-based forwarding 
 enabled, default to accept, logging limited to 9100 packets/entry by default

 ad0: 38166MB <Seagate ST3402111A 3.AAD> at ata0-master UDMA100

 Trying to mount root from ufs:/dev/ad0s1a

 --------------------------------------------------------------------
 Mike Tancsa,                                      tel +1 519 651 3400
 Sentex Communications,                            mike at sentex.net
 Providing Internet since 1994                    www.sentex.net
 Cambridge, Ontario Canada                         www.sentex.net/mike