Re: harddisk DMA
On Sun, Mar 20, 2005 at 12:44:42AM +0100, Uwe wrote:
> here is the corresponding snippet of dmesg.
>
> Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
> ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
> SIS5513: IDE controller at PCI slot 0000:00:02.5
> SIS5513: chipset revision 1
> SIS5513: not 100% native mode: will probe irqs later
> Probing IDE interface ide0...
> hda: IC35L080AVVA07-0, ATA DISK drive
> hdb: HL-DT-ST DVDRAM GSA-4163B, ATAPI CD/DVD-ROM drive
> Probing IDE interface ide1...
> hdc: HDS722525VLAT80, ATA DISK drive
> Probing IDE interface ide2...
> Probing IDE interface ide3...
> Probing IDE interface ide4...
> Probing IDE interface ide5...
> elevator: using anticipatory as default io scheduler
> ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
> ide1 at 0x170-0x177,0x376 on irq 15
> hda: max request size: 128KiB
> hda: 160836480 sectors (82348 MB) w/1863KiB Cache, CHS=65535/16/63
> hda: cache flushes supported
> /dev/ide/host0/bus0/target0/lun0: p1 p2
> hdc: max request size: 1024KiB
> hdc: 488397168 sectors (250059 MB) w/7938KiB Cache, CHS=30401/255/63
> hdc: cache flushes supported
> /dev/ide/host1/bus0/target0/lun0: p1
Well it does appear that the SIS driver is loading first as far as I can
see. Too bad that driver doesn't seem to tell you what mode it runs the
disks at.
> my harddrives are both newer hitachi 80/250GB. I commented out the generic
> part in /etc/modules and added sis5513 at the first line. but lsmod still
> mentions this:
>
> ide_core 146948 28
> ide_cd,ide_generic,via82cxxx,trm290,triflex,slc90e66,sis5513,siimage,serverworks,sc1200,rz1000,piix,pdc202xx_old,opti621,ns87415,hpt366,ide_disk,hpt34x,generic,cy82c693,cs5530,cs5520,cmd64x,atiixp,amd74xx,alim15x3,aec62xx,pdc202xx_new
>
> this looks horrible to me. i don't know, how that hotplug-thing is working
> maybe it is due some action it does...
Does lsmod show sis driver? If so what is the usage count for it?
Is there anything in /proc/ide for the sis or in hd*/settings that shows
a value for dma?
I don't personally deal with SiS stuff when I can avoid it.
Len Sorensen
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