Florian Kulzer wrote:
On Mon, Jul 28, 2008 at 17:48:42 +0300, Anton Liaukevich wrote:
Florian Kulzer wrote:
On Sun, Jul 27, 2008 at 23:05:15 +0300, Anton Liaukevich wrote:
Florian Kulzer wrote:
On Sun, Jul 27, 2008 at 16:57:19 +0300, Anton Liaukevich wrote:
Florian Kulzer wrote:
On Wed, Jul 23, 2008 at 20:59:09 +0300, Anton Liaukevich wrote:
Anton Liaukevich wrote:
In several days I discovered that DMA is turned off on my
HDD (fsck sayed it while Debian booting). Please, help me
turn on DMA mode.
My hardware:
motherboard: Epox 8RDA3I rev 3.3 (nForce 2 Ultra)
hdd: WD1200JB (ide, 120gb)
cpu: Sempron 2200 (k7)
[...]
I have tried command "dmesg | grep -Ei 'ata|ide|amd74xx'", suggested by
you (after rebooting and logging in console (nor kdm that I use
usually)).
Please read output in the attachment. Thank you for help.
[...]
[ 1.642452] Uniform Multi-Platform E-IDE driver
OK, that seems to come from ide_core.
[ 1.642530] ide: Assuming 33MHz system bus speed for PIO modes; override
with idebus=xx
[ 1.643173] Probing IDE interface ide0...
[ 2.058474] hda: WDC WD1200JB-00EVA0, ATA DISK drive
[ 2.730008] Probing IDE interface ide1...
[ 3.592777] hdc: SONY CD-RW CRX320E, ATAPI CD/DVD-ROM drive
[ 4.264276] ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
[ 4.264276] ide1 at 0x170-0x177,0x376 on irq 15
[ 13.612015] hdc: ATAPI 52X DVD-ROM CD-R/RW drive, 2048kB Cache
Some driver (ide_generic?) takes control of the devices before libata is
loaded. Check the output of "cat /proc/interrupts" to see which module
has IRQs 14 and 15.
[ 14.218581] libata version 3.00 loaded.
[ 14.740018] NFORCE2: IDE controller (0x10de:0x0065 rev 0xa2) at PCI slot
0000:00:09.0
[ 14.740306] NFORCE2: port 0x01f0 already claimed by ide0
[ 14.740378] NFORCE2: port 0x0170 already claimed by ide1
The nforce2 driver cannot take ove rthe devices => no DMA.
I can think of a few more things to try, but I don't know how "safe"
they are:
- put amd74xx as the first non-comment line into /etc/modules
- boot with "blacklist=ide_generic" appended to the kernel command line
- likewise, try "libata.dma=3" at boot (may be dangerous)
- check the kernel documentation for "libata.force=..." (can be really
dangerous)
- check if the amd74xx module is included in your initrd:
zcat /boot/initrd.img-$(uname -r) | cpio --quiet -t | grep -E
'(ide|ata|amd)[^/]*\.ko'
- build your own kernel with amd74xx compiled in
I'm giving you contents of '/proc/interrupts' file:
[EMAIL PROTECTED]:~$ cat /proc/interrupts
CPU0
0: 66 IO-APIC-edge timer
1: 2570 IO-APIC-edge i8042
3: 2 IO-APIC-edge
4: 2 IO-APIC-edge
6: 5 IO-APIC-edge floppy
7: 0 IO-APIC-edge parport0
8: 2 IO-APIC-edge rtc0
9: 0 IO-APIC-fasteoi acpi
10: 0 IO-APIC-edge MPU401 UART
12: 100951 IO-APIC-edge i8042
14: 604231 IO-APIC-edge ide0
15: 20161 IO-APIC-edge ide1
17: 742 IO-APIC-fasteoi eth1
20: 0 IO-APIC-fasteoi ohci_hcd:usb2
21: 4317 IO-APIC-fasteoi ehci_hcd:usb1, NVidia nForce2
22: 0 IO-APIC-fasteoi ohci_hcd:usb3
NMI: 0 Non-maskable interrupts
LOC: 117665 Local timer interrupts
RES: 0 Rescheduling interrupts
CAL: 0 function call interrupts
TLB: 0 TLB shootdowns
TRM: 0 Thermal event interrupts
SPU: 0 Spurious interrupts
ERR: 0
MIS: 0
I'm novice in Linux and I don't know how to see which module
has IRQs 14 and 15. Commands "lsmod | grep '604231|20161'" & "ps -A |
grep '604231|20161'" output nothing. Moreover I have noticed that
numbers in the second column of 'cat /proc/interrupts' output sometimes
changes (I have been running it several times). Unfortunately, I haven't
found in man any documentation about '/proc/interrupts' file format.
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