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From: dilinger@mp3revolution.net
Date: Sat, 10 Feb 2001 15:19:53 -0500
To: linux-kernel@vger.kernel.org
Subject: processes drop into uninterruptible sleeps during heavy i/o on 2.4.2-pre3
Message-ID: <20010210151953.A4782@incandescent.mp3revolution.net>
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X-Operating-System: Linux incandescent 2.4.2-pre2 
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As the subject states, w/ 2.4.2-pre3, whenever something starts doing
heavy i/o (most notably mozilla during startup, diff, recursive greps,
etc), it drops into 'D' state:

  343 ?        S      0:00 /bin/sh /usr/local/src/mozilla/dist/bin/run-mozilla.sh /usr/local/src/mozilla/dist/bin/mozilla-bin
  348 ?        D      0:00 /usr/local/src/mozilla/dist/bin/mozilla-bin

Uninterruptable sleeps are rather annoying, as one cannot kill the process
until it's done w/ it's i/o.  This did not happen w/ pre2.

In case it might be in any way hardware/driver related:

00:00.0 Host bridge: Intel Corporation 440BX/ZX - 82443BX/ZX Host bridge (rev 03)
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B-
        Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort+ >SERR- <PERR-
        Latency: 32
        Region 0: Memory at f4000000 (32-bit, prefetchable) [size=64M]
        Capabilities: <available only to root>

00:01.0 PCI bridge: Intel Corporation 440BX/ZX - 82443BX/ZX AGP bridge (rev 03) (prog-if 00 [Normal decode])
        Control: I/O+ Mem+ BusMaster+ SpecCycle+ MemWINV+ VGASnoop- ParErr- Stepping- SERR+ FastB2B-
        Status: Cap- 66Mhz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
        Latency: 32
        Bus: primary=00, secondary=01, subordinate=01, sec-latency=32
        I/O behind bridge: 0000e000-0000efff
        Memory behind bridge: fc000000-feffffff
        Prefetchable memory behind bridge: fff00000-000fffff
        BridgeCtl: Parity- SERR- NoISA+ VGA+ MAbort- >Reset- FastB2B+

00:03.0 CardBus bridge: Texas Instruments PCI1225 (rev 01)
        Subsystem: Dell Computer Corporation: Unknown device 00bc
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
        Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
        Latency: 168, cache line size 08
        Interrupt: pin A routed to IRQ 11
        Region 0: Memory at 10000000 (32-bit, non-prefetchable) [size=4K]
        Bus: primary=00, secondary=02, subordinate=02, sec-latency=176
        Memory window 0: 10400000-107ff000 (prefetchable)
        Memory window 1: 10800000-10bff000
        I/O window 0: 00001000-000010ff
        I/O window 1: 00001400-000014ff
        BridgeCtl: Parity- SERR- ISA- VGA- MAbort- >Reset+ 16bInt+ PostWrite+
        16-bit legacy interface ports at 0001

00:03.1 CardBus bridge: Texas Instruments PCI1225 (rev 01)
        Subsystem: Dell Computer Corporation: Unknown device 00bc
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
        Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
        Latency: 168, cache line size 08
        Interrupt: pin A routed to IRQ 11
        Region 0: Memory at 10001000 (32-bit, non-prefetchable) [size=4K]
        Bus: primary=00, secondary=06, subordinate=06, sec-latency=176
        Memory window 0: 10c00000-10fff000 (prefetchable)
        Memory window 1: 11000000-113ff000
        I/O window 0: 00001800-000018ff
        I/O window 1: 00001c00-00001cff
        BridgeCtl: Parity- SERR- ISA- VGA- MAbort- >Reset+ 16bInt+ PostWrite+
        16-bit legacy interface ports at 0001

00:07.0 Bridge: Intel Corporation 82371AB PIIX4 ISA (rev 02)
        Control: I/O+ Mem+ BusMaster+ SpecCycle+ MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B-
        Status: Cap- 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
        Latency: 0

00:07.1 IDE interface: Intel Corporation 82371AB PIIX4 IDE (rev 01) (prog-if 80 [Master])
        Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
        Status: Cap- 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
        Latency: 32
        Region 4: I/O ports at 0860 [size=16]

00:07.2 USB Controller: Intel Corporation 82371AB PIIX4 USB (rev 01) (prog-if 00 [UHCI])
        Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
        Status: Cap- 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
        Latency: 32
        Interrupt: pin D routed to IRQ 11
        Region 4: I/O ports at dce0 [size=32]

00:07.3 Bridge: Intel Corporation 82371AB PIIX4 ACPI (rev 03)
        Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
        Status: Cap- 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-

00:08.0 Multimedia audio controller: ESS Technology ES1983S Maestro-3i PCI Audio Accelerator (rev 10)
        Subsystem: Dell Computer Corporation: Unknown device 00bb
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
        Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
        Latency: 32 (500ns min, 6000ns max)
        Interrupt: pin A routed to IRQ 5
        Region 0: I/O ports at d800 [size=256]
        Region 1: Memory at faffe000 (32-bit, non-prefetchable) [size=8K]
        Capabilities: <available only to root>

01:00.0 VGA compatible controller: ATI Technologies Inc 3D Rage P/M Mobility AGP 2x (rev 64) (prog-if 00 [VGA])
        Subsystem: Dell Computer Corporation: Unknown device 00bc
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping+ SERR- FastB2B-
        Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
        Latency: 32 (2000ns min), cache line size 08
        Interrupt: pin A routed to IRQ 11
        Region 0: Memory at fd000000 (32-bit, non-prefetchable) [size=16M]
        Region 1: I/O ports at ec00 [size=256]
        Region 2: Memory at fcfff000 (32-bit, non-prefetchable) [size=4K]
        Expansion ROM at <unassigned> [disabled] [size=128K]
        Capabilities: <available only to root>


-- 
"... being a Linux user is sort of like living in a house inhabited
by a large family of carpenters and architects. Every morning when
you wake up, the house is a little different. Maybe there is a new
turret, or some walls have moved. Or perhaps someone has temporarily
removed the floor under your bed." - Unix for Dummies, 2nd Edition
        -- found in the .sig of Rob Riggs, rriggs@tesser.com
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