Just noticed something.. I'm not sure if this is due to a libata-dev change or me switching to pata_cs5536, but my 128MB DOM on the PATA port is hitting the ata_dma_blacklisted() case and it was not previously. This did not happen under 2.6.22.6 using pata_amd. The system is noticeably slower when forced to use PIO4 (as you would expect). Is this expected in the newer code, or is it a bug? Previous 2.6.22.6 kernel using pata_amd: pata_amd 0000:00:0f.2: version 0.3.8 scsi4 : pata_amd scsi5 : pata_amd ata5: PATA max UDMA/100 cmd 0x000101f0 ctl 0x000103f6 bmdma 0x0001ff00 irq 14 ata6: PATA max UDMA/100 cmd 0x00010170 ctl 0x00010376 bmdma 0x0001ff08 irq 15 ata5.00: ATA-0: , 060729DA, max MWDMA2 ata5.00: 256000 sectors, multi 1: LBA ata5.00: configured for MWDMA2 ata6: port disabled. ignoring. Up-to-date libata-dev using pata_cs5536: scsi4 : pata_cs5536 scsi5 : pata_cs5536 ata5: PATA max UDMA/100 cmd 0x1f0 ctl 0x3f6 bmdma 0xff00 irq 14 ata6: DUMMY ata5: PATA max UDMA/100 cmd 0x1f0 ctl 0x3f6 bmdma 0xff00 irq 14 ata5.00: ATA-0: , 060729DA, max MWDMA2 ata5.00: 256000 sectors, multi 1: LBA ata5.00: device is on DMA blacklist, disabling DMA ata5.00: configured for PIO4 ata5.00: device is on DMA blacklist, disabling DMA ata5.00: configured for PIO4 ata5: EH complete Thanks, -Andrew On 10/14/07, Andrew Paprocki <andrew@xxxxxxxxxxx> wrote: > On 10/11/07, Alan Cox <alan@xxxxxxxxxxxxxxxxxxx> wrote: > > On Thu, 11 Oct 2007 03:38:19 -0400 > > "Martin K. Petersen" <martin.petersen@xxxxxxxxxx> wrote: > > > > > > > > This is a driver for the ATA controller on the Geode CS5536 companion > > > chip. The PCI device ID for this device was previously claimed by > > > pata_amd.c but the PIO timings were not correct. This driver also > > > works around a bug in some BIOSes that handle unaligned access to the > > > PCI config registers poorly. Finally, the driver allows fallback to > > > using MSR registers for configuration on BIOSes that are truly > > > broken. > > > > > > Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx> > > > > Acked-by: Alan Cox <alan@xxxxxxxxxx> > > I've been using the driver (boot drive on the port) since Martin's > post and haven't experienced any problems. > > Tested-by: Andrew Paprocki <andrew@xxxxxxxxxxx> - To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
