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SubjectProblems with ide, DMA with _lots_ of controllers. (2.4.0-test9)
Hi,

We have some problems with one experimental IDE-RAID machine, however
the problem seem not to be with the RAID setup, actually the ide sub
system.

Basic system information:
=========================
AMD k6-2 with motherboard ALI15X3 IDE
3*PCI HPT366 IDE cards
PCI SCSI
PCI NIC

5*Maxtor 93652U8 (as master, one on each channel) on the HPT
controller.

CD-ROM (master) + IBM-DTLA-307015 (master) on the ALI15X3

The 5 maxtor disks is used for the RAID.

Problem description:
====================
With DMA disabled everything is _stable_ but the performance is _bad_:


# hdparm -tT /dev/md0

/dev/md0:
Timing buffer-cache reads: 128 MB in 2.26 seconds = 56.64 MB/sec
Timing buffered disk reads: 64 MB in 23.78 seconds = 2.69 MB/sec


With DMA enabled, performance is a better ~10MB/sec but the system is
very unstable. The system locks within seconds or minutes after the
boot.

The message printed before the system locks is something like this:

hdm: timeout wainting for DMA ide_dmaproc: chipset supported ide_1
dma_timeout func only = 14


Anyone who has a clue about this? Below is some additional
information.

Best Regards,
Jakob Sandgren

Nov 6 12:00:11 heffaklump kernel: pty: 256 Unix98 ptys configured
Nov 6 12:00:11 heffaklump kernel: Uniform Multi-Platform E-IDE driver Revision: 6.31
Nov 6 12:00:11 heffaklump kernel: ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
Nov 6 12:00:11 heffaklump kernel: HPT366: IDE controller on PCI bus 00 dev 48
Nov 6 12:00:11 heffaklump kernel: HPT366: chipset revision 1
Nov 6 12:00:11 heffaklump kernel: HPT366: not 100% native mode: will probe irqs later
Nov 6 12:00:11 heffaklump kernel: HPT366: IDE controller on PCI bus 00 dev 49
Nov 6 12:00:11 heffaklump kernel: HPT366: chipset revision 1
Nov 6 12:00:11 heffaklump kernel: HPT366: not 100% native mode: will probe irqs later
Nov 6 12:00:11 heffaklump kernel: HPT366: IDE controller on PCI bus 00 dev 50
Nov 6 12:00:11 heffaklump kernel: HPT366: chipset revision 1
Nov 6 12:00:11 heffaklump kernel: HPT366: not 100% native mode: will probe irqs later
Nov 6 12:00:11 heffaklump kernel: HPT366: IDE controller on PCI bus 00 dev 51
Nov 6 12:00:11 heffaklump kernel: HPT366: chipset revision 1
Nov 6 12:00:11 heffaklump kernel: HPT366: not 100% native mode: will probe irqs later
Nov 6 12:00:11 heffaklump kernel: HPT366: IDE controller on PCI bus 00 dev 68
Nov 6 12:00:11 heffaklump kernel: HPT366: chipset revision 1
Nov 6 12:00:11 heffaklump kernel: HPT366: not 100% native mode: will probe irqs later
Nov 6 12:00:11 heffaklump kernel: HPT366: IDE controller on PCI bus 00 dev 69
Nov 6 12:00:11 heffaklump kernel: HPT366: chipset revision 1
Nov 6 12:00:11 heffaklump kernel: HPT366: not 100% native mode: will probe irqs later
Nov 6 12:00:11 heffaklump kernel: ALI15X3: IDE controller on PCI bus 00 dev 78
Nov 6 12:00:11 heffaklump kernel: ALI15X3: chipset revision 193
Nov 6 12:00:11 heffaklump kernel: ALI15X3 standard IDE storage device detected
Nov 6 12:00:11 heffaklump kernel: hda: IBM-DTLA-307015, ATA DISK drive
Nov 6 12:00:11 heffaklump kernel: hdc: TOSHIBA CD-ROM XM-6502B, ATAPI CDROM drive
Nov 6 12:00:11 heffaklump kernel: hde: Maxtor 93652U8, ATA DISK drive
Nov 6 12:00:11 heffaklump kernel: hdh: Maxtor 93652U8, ATA DISK drive
Nov 6 12:00:11 heffaklump kernel: hdk: Maxtor 93652U8, ATA DISK drive
Nov 6 12:00:11 heffaklump kernel: hdn: Maxtor 93652U8, ATA DISK drive
Nov 6 12:00:11 heffaklump kernel: hdp: Maxtor 93652U8, ATA DISK drive
Nov 6 12:00:11 heffaklump kernel: ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
Nov 6 12:00:11 heffaklump kernel: ide1 at 0x170-0x177,0x376 on irq 15
Nov 6 12:00:11 heffaklump kernel: ide2 at 0xb800-0xb807,0xb402 on irq 3
Nov 6 12:00:11 heffaklump kernel: ide3 at 0xa800-0xa807,0xa402 on irq 3
Nov 6 12:00:11 heffaklump kernel: ide5 at 0x8800-0x8807,0x8402 on irq 4
Nov 6 12:00:11 heffaklump kernel: ide6 at 0x7000-0x7007,0x6802 on irq 3
Nov 6 12:00:11 heffaklump kernel: ide7 at 0x6000-0x6007,0x5802 on irq 3
Nov 6 12:00:11 heffaklump kernel: hda: 30003120 sectors (15362 MB) w/1916KiB Cache, CHS=1867/255/63
Nov 6 12:00:11 heffaklump kernel: hde: 71346240 sectors (36529 MB) w/2048KiB Cache, CHS=70780/16/63
Nov 6 12:00:11 heffaklump kernel: hdh: 71346240 sectors (36529 MB) w/2048KiB Cache, CHS=70780/16/63
Nov 6 12:00:11 heffaklump kernel: hdk: 71346240 sectors (36529 MB) w/2048KiB Cache, CHS=70780/16/63
Nov 6 12:00:11 heffaklump kernel: hdn: 71346240 sectors (36529 MB) w/2048KiB Cache, CHS=70780/16/63
Nov 6 12:00:11 heffaklump kernel: hdp: 71346240 sectors (36529 MB) w/2048KiB Cache, CHS=70780/16/63
Nov 6 12:00:11 heffaklump kernel: hdc: ATAPI 40X CD-ROM drive, 256kB Cache
Nov 6 12:00:11 heffaklump kernel: Uniform CD-ROM driver Revision: 3.11
Nov 6 12:00:11 heffaklump kernel: Partition check:
Nov 6 12:00:11 heffaklump kernel: hda: hda1 hda2 < hda5 hda6 >
Nov 6 12:00:11 heffaklump kernel: hde: hde1
Nov 6 12:00:11 heffaklump kernel: hdh: hdh1
Nov 6 12:00:11 heffaklump kernel: hdk: hdk1
Nov 6 12:00:11 heffaklump kernel: hdn: hdn1
Nov 6 12:00:11 heffaklump kernel: hdp: hdp1
Nov 6 12:00:11 heffaklump kernel: Floppy drive(s): fd0 is 1.44M

.......

# cat /proc/interrupts
CPU0
0: 42935593 XT-PIC timer
1: 21 XT-PIC keyboard
2: 0 XT-PIC cascade
3: 339227686 XT-PIC ide2, ide3, ide6, ide7
4: 121313762 XT-PIC ide5
10: 2319254 XT-PIC eth0
11: 10798826 XT-PIC sym53c8xx
12: 0 XT-PIC PS/2 Mouse
13: 0 XT-PIC fpu
14: 4356172 XT-PIC ide0
15: 4 XT-PIC ide1
NMI: 0
ERR: 0
# cat /proc/ide/drivers
ide-cdrom version 4.58
ide-disk version 1.10


--
Jakob Sandgren South Pole AB
Phone: +46 8 56610650 Banvaktsvägen 12
Fax: +46 8 56610601 SE - 17148 Solna
e-mail: jakob@southpole.se www.southpole.se
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