[2.4.21-p2] more VIA-IDE problems

[2.4.21-p2] more VIA-IDE problems

[jarausch]

Hi

beginning with 2.4.21-pre1 the kernel disables DMA on my
regular ATA harddrives.

Upto 2.4.20 (Uniform Multi-Platform E-IDE driver Revision: 6.31)
there have never been any problems, now I get

! Uniform Multi-Platform E-IDE driver Revision: 7.00beta-2.4
  ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
! VP_IDE: IDE controller at PCI slot 00:04.1
  VP_IDE: chipset revision 16
  VP_IDE: not 100% native mode: will probe irqs later
  VP_IDE: VIA vt82c686a (rev 22) IDE UDMA66 controller on pci00:04.1
      ide0: BM-DMA at 0xd800-0xd807, BIOS settings: hda:DMA, hdb:DMA
      ide1: BM-DMA at 0xd808-0xd80f, BIOS settings: hdc:DMA, hdd:DMA
  hda: Maxtor 94098H6, ATA DISK drive
  hdb: LITEON DVD-ROM LTD122, ATAPI CD/DVD-ROM drive
+ hda: DMA disabled
+ blk: queue c0395e20, I/O limit 4095Mb (mask 0xffffffff)
+ hdb: DMA disabled
  hdc: ST340823A, ATA DISK drive
  hdd: R/RW 4x4x32, ATAPI CD/DVD-ROM drive
+ hdc: DMA disabled
+ blk: queue c039626c, I/O limit 4095Mb (mask 0xffffffff)
+ hdd: DMA disabled
  ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
  ide1 at 0x170-0x177,0x376 on irq 15


Is there a patch for this?

Many thanks,
Helmut.

---
Helmut Jarausch

Lehrstuhl fuer Numerische Mathematik
RWTH - Aachen University
D 52056 Aachen, Germany

Re: [2.4.21-p2] more VIA-IDE problems

[John Bradford]

> beginning with 2.4.21-pre1 the kernel disables DMA on my
> regular ATA harddrives.
> 
> Upto 2.4.20 (Uniform Multi-Platform E-IDE driver Revision: 6.31)
> there have never been any problems, now I get
> 
> ! Uniform Multi-Platform E-IDE driver Revision: 7.00beta-2.4
>   ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
> ! VP_IDE: IDE controller at PCI slot 00:04.1
>   VP_IDE: chipset revision 16
>   VP_IDE: not 100% native mode: will probe irqs later
>   VP_IDE: VIA vt82c686a (rev 22) IDE UDMA66 controller on pci00:04.1
>       ide0: BM-DMA at 0xd800-0xd807, BIOS settings: hda:DMA, hdb:DMA
>       ide1: BM-DMA at 0xd808-0xd80f, BIOS settings: hdc:DMA, hdd:DMA
>   hda: Maxtor 94098H6, ATA DISK drive
>   hdb: LITEON DVD-ROM LTD122, ATAPI CD/DVD-ROM drive
> + hda: DMA disabled
> + blk: queue c0395e20, I/O limit 4095Mb (mask 0xffffffff)
> + hdb: DMA disabled
>   hdc: ST340823A, ATA DISK drive
>   hdd: R/RW 4x4x32, ATAPI CD/DVD-ROM drive
> + hdc: DMA disabled
> + blk: queue c039626c, I/O limit 4095Mb (mask 0xffffffff)
> + hdd: DMA disabled
>   ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
>   ide1 at 0x170-0x177,0x376 on irq 15

I think that they are superflous debugging messages, and that DMA is
actually re-enabled silently afterwards.  I could be wrong, though.

John.

Re: [2.4.21-p2] more VIA-IDE problems

[Helmut Jarausch]

John Bradford wrote

> > beginning with 2.4.21-pre1 the kernel disables DMA on my
> > regular ATA harddrives.
> >

snip

>
> I think that they are superflous debugging messages, and that DMA is
>
> actually re-enabled silently afterwards. I could be wrong, though.

Probably you are right.

I've just run  bonnie++ (1.93) with 2.4.20 and 2.4.21-pre2
and there are NO significant differences.

Sorry for the noise!

Helmut.

-- 
Helmut Jarausch

Lehrstuhl fuer Numerische Mathematik
RWTH - Aachen University
D 52056 Aachen, Germany

Re: [2.4.21-p2] more VIA-IDE problems

[Helmut Jarausch]

John Bradford wrote

> > beginning with 2.4.21-pre1 the kernel disables DMA on my
> > regular ATA harddrives.
> >
> > Upto 2.4.20 (Uniform Multi-Platform E-IDE driver Revision: 6.31)
> > there have never been any problems, now I get
> >
> > ! Uniform Multi-Platform E-IDE driver Revision: 7.00beta-2.4
> > ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
> > ! VP_IDE: IDE controller at PCI slot 00:04.1
> > VP_IDE: chipset revision 16
> > VP_IDE: not 100% native mode: will probe irqs later
> > VP_IDE: VIA vt82c686a (rev 22) IDE UDMA66 controller on pci00:04.1
> > ide0: BM-DMA at 0xd800-0xd807, BIOS settings: hda:DMA, hdb:DMA
> > ide1: BM-DMA at 0xd808-0xd80f, BIOS settings: hdc:DMA, hdd:DMA
> > hda: Maxtor 94098H6, ATA DISK drive
> > hdb: LITEON DVD-ROM LTD122, ATAPI CD/DVD-ROM drive
> > + hda: DMA disabled
> > + blk: queue c0395e20, I/O limit 4095Mb (mask 0xffffffff)
> > + hdb: DMA disabled
> > hdc: ST340823A, ATA DISK drive
> > hdd: R/RW 4x4x32, ATAPI CD/DVD-ROM drive
> > + hdc: DMA disabled
> > + blk: queue c039626c, I/O limit 4095Mb (mask 0xffffffff)
> > + hdd: DMA disabled
> > ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
> > ide1 at 0x170-0x177,0x376 on irq 15
> 
> I think that they are superflous debugging messages, and that DMA is
> 
> actually re-enabled silently afterwards. I could be wrong, though.

I have to check again, but a preliminary stress test (bonnie++)
shows 95 % cpu usage.

Helmut.

-- 
Helmut Jarausch

Lehrstuhl fuer Numerische Mathematik
RWTH - Aachen University
D 52056 Aachen, Germany