Hello everyone,

having upgraded my laptop to a recent 8_RELENG from an earlier 8_RELENG from  
the time of the 8.0 release, I find it behaves very strangely.

When booting devd hangs often until cancelled with ctrl+c.
Sometimes it seems that pending work is waiting for disk activity until it is 
kicked off. I noticed this when setting up the keycodes for zsh and the 
duration for reading each key differed significantly depending whether there 
was disk activity or not. This happens as well in X as in console.

I tried disabling powerd, setting kern.hz to 100 and using the timers ACPI-
FAST (default), HPET, i8254 and TSC - no change so far.

I am not sure if it is because an ancient configuration setting I had in place 
earlier and that I am missing now or whether this is due to a code change.
However, I am at a loss and would appreciate further input on the matter. Due 
to the upcoming release I am posting to -stable just to get this tracked in 
case this is the symptom of some obscure bug.

Thank you in advance & Regards


This is vmstat -i:
% vmstat -i                                                                     
interrupt                          total       rate
irq1: atkbd0                          28          0
irq9: acpi0                          173          0
irq12: psm0                           17          0
irq14: ata0                         3009          8
irq16: wpi0 uhci3+                  5516         15
irq18: uhci2                          14          0
irq21: fwohci0                         2          0
irq22: bfe0 sdhci0                   608          1
irq23: uhci0 ehci0                     2          0
cpu0: timer                        18165         51
irq256: hdac0                         17          0
cpu1: timer                        17986         50
Total                              45537        127

this is dmesg:

% dmesg                                                                         
Copyright (c) 1992-2010 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 is a registered trademark of The FreeBSD Foundation.
FreeBSD 8.1-PRERELEASE #0: Thu Jul 15 14:29:16 UTC 2010
    root@:/usr/obj/usr/src/sys/GENERIC amd64
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: Intel(R) Core(TM)2 CPU         T5500  @ 1.66GHz (1662.52-MHz K8-class 
  Origin = "GenuineIntel"  Id = 0x6f6  Family = 6  Model = f  Stepping = 6
  AMD Features=0x20100800<SYSCALL,NX,LM>
  AMD Features2=0x1<LAHF>
  TSC: P-state invariant
real memory  = 2684354560 (2560 MB)
avail memory = 2562097152 (2443 MB)
FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
FreeBSD/SMP: 1 package(s) x 2 core(s)
 cpu0 (BSP): APIC ID:  0
 cpu1 (AP): APIC ID:  1
ioapic0: Changing APIC ID to 1
ioapic0 <Version 2.0> irqs 0-23 on motherboard
kbd1 at kbdmux0
acpi0: <PTLTD Capell00> on motherboard
acpi0: [ITHREAD]
acpi0: Power Button (fixed)
Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000
acpi_timer0: <24-bit timer at 3.579545MHz> port 0x1008-0x100b on acpi0
cpu0: <ACPI CPU> on acpi0
cpu1: <ACPI CPU> on acpi0
acpi_ec0: <Embedded Controller: GPE 0x17> port 0x62,0x66 on acpi0
acpi_hpet0: <High Precision Event Timer> iomem 0xfed00000-0xfed003ff on acpi0
Timecounter "HPET" frequency 14318180 Hz quality 900
acpi_acad0: <AC Adapter> on acpi0
battery0: <ACPI Control Method Battery> on acpi0
acpi_lid0: <Control Method Lid Switch> 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
vgapci0: <VGA-compatible display> port 0x1800-0x1807 mem 
0xd8100000-0xd817ffff,0xc0000000-0xcfffffff,0xd8200000-0xd823ffff irq 16 at 
device 2.0 on pci0
agp0: <Intel 82945GM (945GM GMCH) SVGA controller> on vgapci0
agp0: detected 7932k stolen memory
agp0: aperture size is 256M
vgapci1: <VGA-compatible display> mem 0xd8180000-0xd81fffff at device 2.1 on 
hdac0: <Intel 82801G High Definition Audio Controller> mem 
0xd8240000-0xd8243fff irq 22 at device 27.0 on pci0
hdac0: HDA Driver Revision: 20100226_0142
hdac0: [ITHREAD]
pcib1: <ACPI PCI-PCI bridge> irq 17 at device 28.0 on pci0
pci2: <ACPI PCI bus> on pcib1
wpi0: <Intel(R) PRO/Wireless 3945ABG> mem 0xd4000000-0xd4000fff irq 16 at 
device 0.0 on pci2
wpi0: Driver Revision 20071127
wpi0: Hardware Revision (0x1)
adding chan 1 (2412MHz) flags=0x2b maxpwr=15 passive=0, offset 2
adding chan 2 (2417MHz) flags=0x2b maxpwr=15 passive=0, offset 4
adding chan 3 (2422MHz) flags=0x2b maxpwr=15 passive=0, offset 6
adding chan 4 (2427MHz) flags=0x2b maxpwr=15 passive=0, offset 8
adding chan 5 (2432MHz) flags=0x2b maxpwr=15 passive=0, offset 10
adding chan 6 (2437MHz) flags=0x2b maxpwr=15 passive=0, offset 12
adding chan 7 (2442MHz) flags=0x2b maxpwr=15 passive=0, offset 14
adding chan 8 (2447MHz) flags=0x2b maxpwr=15 passive=0, offset 16
adding chan 9 (2452MHz) flags=0x2b maxpwr=15 passive=0, offset 18
adding chan 10 (2457MHz) flags=0x2b maxpwr=15 passive=0, offset 20
adding chan 11 (2462MHz) flags=0x2b maxpwr=15 passive=0, offset 22
adding chan 12 (2467MHz) flags=0x21 maxpwr=15 passive=1, offset 24
adding chan 13 (2472MHz) flags=0x21 maxpwr=15 passive=1, offset 26
adding chan 34 (5170MHz) flags=0x21 maxpwr=15 passive=1, offset 27
adding chan 36 (5180MHz) flags=0xab maxpwr=15 passive=0, offset 28
adding chan 38 (5190MHz) flags=0x21 maxpwr=15 passive=1, offset 29
adding chan 40 (5200MHz) flags=0xab maxpwr=15 passive=0, offset 30
adding chan 42 (5210MHz) flags=0x21 maxpwr=15 passive=1, offset 31
adding chan 44 (5220MHz) flags=0xab maxpwr=15 passive=0, offset 32
adding chan 46 (5230MHz) flags=0x21 maxpwr=15 passive=1, offset 33
adding chan 48 (5240MHz) flags=0xab maxpwr=15 passive=0, offset 34
adding chan 52 (5260MHz) flags=0xb1 maxpwr=15 passive=1, offset 35
adding chan 56 (5280MHz) flags=0xb1 maxpwr=15 passive=1, offset 36
adding chan 60 (5300MHz) flags=0xb1 maxpwr=15 passive=1, offset 37
adding chan 64 (5320MHz) flags=0xb1 maxpwr=15 passive=1, offset 38
adding chan 100 (5500MHz) flags=0xb1 maxpwr=16 passive=1, offset 39
adding chan 104 (5520MHz) flags=0xb1 maxpwr=16 passive=1, offset 40
adding chan 108 (5540MHz) flags=0xb1 maxpwr=16 passive=1, offset 41
adding chan 112 (5560MHz) flags=0xb1 maxpwr=16 passive=1, offset 42
adding chan 116 (5580MHz) flags=0xb1 maxpwr=16 passive=1, offset 43
adding chan 120 (5600MHz) flags=0xb1 maxpwr=16 passive=1, offset 44
adding chan 124 (5620MHz) flags=0xb1 maxpwr=16 passive=1, offset 45
adding chan 128 (5640MHz) flags=0xb1 maxpwr=16 passive=1, offset 46
adding chan 132 (5660MHz) flags=0xb1 maxpwr=16 passive=1, offset 47
adding chan 136 (5680MHz) flags=0xb1 maxpwr=16 passive=1, offset 48
adding chan 140 (5700MHz) flags=0xb1 maxpwr=16 passive=1, offset 49
power group 0: chan=1 maxpwr=45 temp=-176
        sample 0: index=13 power=42
        sample 1: index=29 power=30
        sample 2: index=47 power=11
        sample 3: index=58 power=0
        sample 4: index=77 power=-18
power group 1: chan=44 maxpwr=50 temp=-180
        sample 0: index=12 power=42
        sample 1: index=19 power=35
        sample 2: index=32 power=22
        sample 3: index=43 power=11
        sample 4: index=77 power=-21
power group 2: chan=64 maxpwr=48 temp=-179
        sample 0: index=12 power=41
        sample 1: index=20 power=34
        sample 2: index=33 power=21
        sample 3: index=44 power=11
        sample 4: index=77 power=-19
power group 3: chan=116 maxpwr=47 temp=-178
        sample 0: index=12 power=36
        sample 1: index=20 power=28
        sample 2: index=36 power=11
        sample 3: index=48 power=1
        sample 4: index=77 power=-26
power group 4: chan=153 maxpwr=47 temp=-176
        sample 0: index=10 power=35
        sample 1: index=20 power=23
        sample 2: index=32 power=11
        sample 3: index=42 power=3
        sample 4: index=77 power=-28
wpi0: Regulatory Domain: MoW2
wpi0: Hardware Type: B
wpi0: Hardware Revision: ?
wpi0: SKU does support 802.11a
wpi0: [ITHREAD]
pcib2: <ACPI PCI-PCI bridge> irq 16 at device 28.1 on pci0
pci3: <ACPI PCI bus> on pcib2
uhci0: <Intel 82801G (ICH7) USB controller USB-A> port 0x1820-0x183f irq 23 at 
device 29.0 on pci0
uhci0: [ITHREAD]
usbus0: <Intel 82801G (ICH7) USB controller USB-A> on uhci0
uhci1: <Intel 82801G (ICH7) USB controller USB-B> port 0x1840-0x185f irq 19 at 
device 29.1 on pci0
uhci1: [ITHREAD]
usbus1: <Intel 82801G (ICH7) USB controller USB-B> on uhci1
uhci2: <Intel 82801G (ICH7) USB controller USB-C> port 0x1860-0x187f irq 18 at 
device 29.2 on pci0
uhci2: [ITHREAD]
usbus2: <Intel 82801G (ICH7) USB controller USB-C> on uhci2
uhci3: <Intel 82801G (ICH7) USB controller USB-D> port 0x1880-0x189f irq 16 at 
device 29.3 on pci0
uhci3: [ITHREAD]
usbus3: <Intel 82801G (ICH7) USB controller USB-D> on uhci3
ehci0: <Intel 82801GB/R (ICH7) USB 2.0 controller> mem 0xd8444000-0xd84443ff 
irq 23 at device 29.7 on pci0
ehci0: [ITHREAD]
usbus4: EHCI version 1.0
usbus4: <Intel 82801GB/R (ICH7) USB 2.0 controller> on ehci0
pcib3: <ACPI PCI-PCI bridge> at device 30.0 on pci0
pci5: <ACPI PCI bus> on pcib3
bfe0: <Broadcom BCM4401-B0 Fast Ethernet> mem 0xd8000000-0xd8001fff irq 22 at 
device 5.0 on pci5
miibus0: <MII bus> on bfe0
bmtphy0: <BCM4401 10/100baseTX PHY> PHY 1 on miibus0
bmtphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
bfe0: Ethernet address: 00:13:77:27:90:3a
bfe0: [ITHREAD]
cbb0: <RF5C476 PCI-CardBus Bridge> at device 9.0 on pci5
cardbus0: <CardBus bus> on cbb0
pccard0: <16-bit PCCard bus> on cbb0
cbb0: [FILTER]
fwohci0: <Ricoh R5C552> mem 0xd8002000-0xd80027ff at device 9.1 on pci5
fwohci0: [ITHREAD]
fwohci0: OHCI version 1.0 (ROM=1)
fwohci0: No. of Isochronous channels is 4.
fwohci0: EUI64 00:00:f0:41:01:03:a6:22
fwohci0: Phy 1394a available S400, 2 ports.
fwohci0: Link S400, max_rec 2048 bytes.
firewire0: <IEEE1394(FireWire) bus> on fwohci0
fwe0: <Ethernet over FireWire> on firewire0
if_fwe0: Fake Ethernet address: 02:00:f0:03:a6:22
fwe0: Ethernet address: 02:00:f0:03:a6:22
fwip0: <IP over FireWire> on firewire0
fwip0: Firewire address: 00:00:f0:41:01:03:a6:22 @ 0xfffe00000000, S400, 
maxrec 2048
dcons_crom0: <dcons configuration ROM> on firewire0
dcons_crom0: bus_addr 0x9ab44000
fwohci0: Initiate bus reset
fwohci0: fwohci_intr_core: BUS reset
fwohci0: fwohci_intr_core: node_id=0x00000000, SelfID Count=1, CYCLEMASTER 
sdhci0: <RICOH R5C822 SD> mem 0xd8002800-0xd80028ff at device 9.2 on pci5
sdhci0: 1 slot(s) allocated
sdhci0: [ITHREAD]
pci5: <base peripheral> at device 9.3 (no driver attached)
pci5: <base peripheral> at device 9.4 (no driver attached)
pci5: <base peripheral> at device 9.5 (no driver attached)
isab0: <PCI-ISA bridge> at device 31.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <Intel ICH7 UDMA100 controller> port 
0x1f0-0x1f7,0x3f6,0x170-0x177,0x376,0x1810-0x181f at device 31.1 on pci0
ata0: <ATA channel 0> on atapci0
ata0: [ITHREAD]
pci0: <serial bus, SMBus> at device 31.3 (no driver attached)
acpi_tz0: <Thermal Zone> on acpi0
acpi_tz1: <Thermal Zone> on acpi0
atrtc0: <AT realtime clock> port 0x70-0x77 irq 8 on acpi0
atrtc0: Warning: Couldn't map I/O.
atkbdc0: <Keyboard controller (i8042)> port 0x60,0x64 irq 1 on acpi0
atkbd0: <AT Keyboard> irq 1 on atkbdc0
kbd0 at atkbd0
atkbd0: [GIANT-LOCKED]
atkbd0: [ITHREAD]
psm0: <PS/2 Mouse> irq 12 on atkbdc0
psm0: [ITHREAD]
psm0: model IntelliMouse, device ID 3
orm0: <ISA Option ROM> at iomem 0xdc000-0xdffff on isa0
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
ppc0: cannot reserve I/O port range
coretemp0: <CPU On-Die Thermal Sensors> on cpu0
est0: <Enhanced SpeedStep Frequency Control> on cpu0
p4tcc0: <CPU Frequency Thermal Control> on cpu0
coretemp1: <CPU On-Die Thermal Sensors> on cpu1
est1: <Enhanced SpeedStep Frequency Control> on cpu1
p4tcc1: <CPU Frequency Thermal Control> on cpu1
firewire0: 1 nodes, maxhop <= 0 cable IRM irm(0)  (me) 
firewire0: bus manager 0 
ZFS NOTICE: Prefetch is disabled by default if less than 4GB of RAM is 
            to enable, add "vfs.zfs.prefetch_disable=0" to /boot/loader.conf.
ZFS filesystem version 3
ZFS storage pool version 14
Timecounters tick every 10.000 msec
vboxdrv: fAsync=0 offMin=0x122 offMax=0x398
usbus0: 12Mbps Full Speed USB v1.0
usbus1: 12Mbps Full Speed USB v1.0
usbus2: 12Mbps Full Speed USB v1.0
usbus3: 12Mbps Full Speed USB v1.0
usbus4: 480Mbps High Speed USB v2.0
cbb0: Unsupported card type detected
ad0: 95396MB <HTS541010G9AT00 MBZOA60A> at ata0-master UDMA100 
ugen0.1: <Intel> at usbus0
uhub0: <Intel UHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on usbus0
ugen1.1: <Intel> at usbus1
uhub1: <Intel UHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on usbus1
ugen2.1: <Intel> at usbus2
uhub2: <Intel UHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on usbus2
ugen3.1: <Intel> at usbus3
uhub3: <Intel UHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on usbus3
ugen4.1: <Intel> at usbus4
uhub4: <Intel EHCI root HUB, class 9/0, rev 2.00/1.00, addr 1> on usbus4
hdac0: HDA Codec #0: Analog Devices AD1986A
hdac0: HDA Codec #1: Lucent/Agere Systems (Unknown)
hdac0: hdac_widget_connection_parse: nid=18 WARNING: zero cnid entnum=4 j=2 
index=0 entries=8 found=2 res=0x21002211
pcm0: <HDA Analog Devices AD1986A PCM #0 Analog> at cad 0 nid 1 on hdac0
pcm1: <HDA Analog Devices AD1986A PCM #1 Digital> at cad 0 nid 1 on hdac0
SMP: AP CPU #1 Launched!
uhub1: 2 ports with 2 removable, self powered
uhub0: 2 ports with 2 removable, self powered
uhub2: 2 ports with 2 removable, self powered
uhub3: 2 ports with 2 removable, self powered
Root mount waiting for: usbus4
Root mount waiting for: usbus4
Root mount waiting for: usbus4
uhub4: 8 ports with 8 removable, self powered
Trying to mount root from zfs:zroot/root
ugen2.2: <Broadcom Corp> at usbus2
vboxnet0: Ethernet address: 0a:00:27:00:00:00
wlan0: Ethernet address: 00:18:de:24:c6:7c
wpi0: timeout resetting Tx ring 1
wpi0: timeout resetting Tx ring 3
wpi0: timeout resetting Tx ring 4
microcode alive notification version 10e02 alive 1
microcode alive notification version 10e02 alive 1
wpi_newstate: INIT -> SCAN flags 0x0
wpi_newstate: SCAN -> AUTH flags 0x0
config chan 3 flags 8005 cck f ofdm 15
wpi_newstate: AUTH -> ASSOC flags 0x0
wpi_newstate: ASSOC -> RUN flags 0x0
config chan 3 flags 8015
wpi0: need multicast update callback
wpi0: need multicast update callback
wpi0: need multicast update callback
WARNING: attempt to domain_add(bluetooth) after domainfinalize()
drm0: <Intel i945GM> on vgapci0
vgapci0: child drm0 requested pci_enable_busmaster
info: [drm] AGP at 0xc0000000 256MB
info: [drm] Initialized i915 1.6.0 20080730
drm0: [ITHREAD]

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