I'm using a silver Speedtouch under Fedora Core 1 with kernel
2.4.22-1.2179.nptl on an Acer Travelmate 632LC laptop. Under heavy disk
activity, i.e. while watching a movie or doing any activity that involves
many disk accesses, sometimes Linux hangs up, printing the following messages
in /var/log/messages:
Apr 18 15:38:56 localhost kernel: hda: dma_timer_expiry: dma status == 0x01
Apr 18 15:39:07 localhost kernel: hda: error waiting for DMA
Apr 18 15:39:07 localhost kernel: hda: dma timeout retry: status=0x58 {
DriveReady SeekComplete DataRequest }
At the same time the Speedtouch driver prints lots of messages like the
following one:
Apr 19 07:45:00 localhost kernel: usbdevfs: USBDEVFS_BULK failed dev 2 ep 0x7
len 1590 ret -12 (the length and the returned value aren't always the same)
This happens only when the ADSL connection is up and the Speedtouch driver is
loaded. I can avoid the problem setting the dma off on hda, but that way my
computer's performance gets too low.
Watching at the usb Linux code I noticed that the above quoted message is
printed when a read/write request to the driver times out; moreover, I
noticed that in the pppoa3.c code write requests to the usb driver are done
using a 1000 timeout value. Maybe the driver spends too much waiting for dma
to complete, blocking disk dma requests and eventually making them time out.
I don't know anything about dma on pci buses, but I thought that each device
should have it's own dma channel, thus avoiding access conflict. Is this
true? Is there any way of setting dma channels for usb and disk?
Can anyone help me?
Remigio Di Muzio
PS - This is the output of lspci -v on my laptop, I don't know whether it
could be useful:
00:00.0 Host bridge: ALi Corporation M1671 Super P4 Northbridge [AGP4X,PCI and
SDR/DDR] (rev 02)
Flags: bus master, medium devsel, latency 0
Memory at f0000000 (32-bit, prefetchable) [size=128M]
Capabilities: [b0] AGP version 2.0
Capabilities: [a4] Power Management version 1
00:01.0 PCI bridge: ALi Corporation PCI to AGP Controller (prog-if 00 [Normal
decode])
Flags: bus master, slow devsel, latency 0
Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
Memory behind bridge: e1000000-e1ffffff
Prefetchable memory behind bridge: e8000000-efffffff
00:06.0 Multimedia audio controller: ALi Corporation M5451 PCI AC-Link
Controller Audio Device (rev 02)
Subsystem: Acer Incorporated [ALI]: Unknown device 1018
Flags: bus master, medium devsel, latency 64, IRQ 10
I/O ports at 1800 [size=256]
Memory at e0000000 (32-bit, non-prefetchable) [size=4K]
Capabilities: [dc] Power Management version 2
00:07.0 ISA bridge: ALi Corporation M1533 PCI to ISA Bridge [Aladdin IV]
Subsystem: Acer Incorporated [ALI]: Unknown device 102b
Flags: bus master, medium devsel, latency 0
Capabilities: [a0] Power Management version 1
00:08.0 Modem: ALi Corporation Intel 537 [M5457 AC-Link Modem] (prog-if 00
[Generic])
Subsystem: Acer Incorporated [ALI]: Unknown device 102b
Flags: bus master, medium devsel, latency 64, IRQ 11
Memory at e0001000 (32-bit, non-prefetchable) [size=4K]
I/O ports at 1c00 [size=256]
Capabilities: [40] Power Management version 2
00:0a.0 Ethernet controller: Realtek Semiconductor Co., Ltd.
RTL-8139/8139C/8139C+ (rev 10)
Subsystem: Acer Incorporated [ALI]: Unknown device 102b
Flags: bus master, medium devsel, latency 64, IRQ 11
I/O ports at 2000 [size=256]
Memory at e0002000 (32-bit, non-prefetchable) [size=256]
Expansion ROM at <unassigned> [disabled] [size=64K]
Capabilities: [50] Power Management version 2
00:0b.0 FireWire (IEEE 1394): VIA Technologies, Inc. IEEE 1394 Host Controller
(rev 46) (prog-if 10 [OHCI])
Subsystem: VIA Technologies, Inc. IEEE 1394 Host Controller
Flags: bus master, medium devsel, latency 64, IRQ 11
Memory at e0002800 (32-bit, non-prefetchable) [size=2K]
I/O ports at 2400 [size=128]
Capabilities: [50] Power Management version 2
00:0f.0 USB Controller: ALi Corporation USB 1.1 Controller (rev 03) (prog-if
10 [OHCI])
Subsystem: Acer Incorporated [ALI]: Unknown device 102b
Flags: bus master, medium devsel, latency 64, IRQ 11
Memory at e0003000 (32-bit, non-prefetchable) [size=4K]
Capabilities: [60] Power Management version 2
00:10.0 IDE interface: ALi Corporation M5229 IDE (rev c4) (prog-if 80
[Master])
Subsystem: Acer Incorporated [ALI]: Unknown device 102b
Flags: bus master, medium devsel, latency 32
I/O ports at <ignored>
I/O ports at <ignored>
I/O ports at <ignored>
I/O ports at <ignored>
I/O ports at 2480 [size=16]
Capabilities: [60] Power Management version 2
00:11.0 Bridge: ALi Corporation M7101 PMU
Subsystem: Acer Incorporated [ALI]: Unknown device 102b
Flags: medium devsel
00:13.0 CardBus bridge: O2 Micro, Inc. OZ6933 Cardbus Controller (rev 02)
Subsystem: Acer Incorporated [ALI]: Unknown device 102b
Flags: bus master, stepping, slow devsel, latency 0, IRQ 11
Memory at 20000000 (32-bit, non-prefetchable) [size=4K]
Bus: primary=00, secondary=04, subordinate=07, sec-latency=0
Memory window 0: 00000000-0000f000
I/O window 0: 00000000-00000003
I/O window 1: 00000000-00000003
16-bit legacy interface ports at 0001
00:13.1 CardBus bridge: O2 Micro, Inc. OZ6933 Cardbus Controller (rev 02)
Subsystem: Acer Incorporated [ALI]: Unknown device 102b
Flags: bus master, stepping, slow devsel, latency 0, IRQ 11
Memory at 20001000 (32-bit, non-prefetchable) [size=4K]
Bus: primary=00, secondary=03, subordinate=03, sec-latency=0
Memory window 0: 00000000-0000f000
I/O window 0: 00000000-00000003
I/O window 1: 00000000-00000003
16-bit legacy interface ports at 0001
00:14.0 USB Controller: ALi Corporation USB 1.1 Controller (rev 03) (prog-if
10 [OHCI])
Subsystem: Acer Incorporated [ALI]: Unknown device 102b
Flags: bus master, medium devsel, latency 64, IRQ 11
Memory at e0004000 (32-bit, non-prefetchable) [size=4K]
Capabilities: [60] Power Management version 2
01:00.0 VGA compatible controller: nVidia Corporation NV11 [GeForce2 Go] (rev
b2) (prog-if 00 [VGA])
Subsystem: Acer Incorporated [ALI]: Unknown device 102b
Flags: bus master, 66Mhz, medium devsel, latency 64, IRQ 11
Memory at e1000000 (32-bit, non-prefetchable) [size=16M]
Memory at e8000000 (32-bit, prefetchable) [size=128M]
Expansion ROM at <unassigned> [disabled] [size=64K]
Capabilities: [60] Power Management version 2
Capabilities: [44] AGP version 2.0
Liste de diffusion modem ALCATEL SpeedTouch USB
Pour se désinscrire : mailto:[EMAIL PROTECTED]
