Messages in this thread |  | | | Date | Fri, 14 Aug 2009 14:18:08 -0700 | | From | Ben Greear <> | | Subject | Re: How to disable DMA for compact-flash disk? |
| |
On 08/14/2009 02:10 PM, Alan Cox wrote: >> This worked fine, but now I'm having some more issues. Using libata is 1/2 >> as fast as using IDE mode. I *think* the problem might be that libsata >> may not be using 32-bit PIO mode, but I'm not certain of that. It seems >> that ide mode uses PIO2 v/s PIO4 for libsata too. > > As of 2.6.29 libata doesn't use 32bit PIO (it shouldn't make a difference > for most chipsets but it does for some). 2.6.30 does for some and you can > turn it on for others if you want to test by inheriting > ata_bmdma32_port_ops instead of ata_bmdma_port_ops
Can you give me a clue as to what code needs poking? I'm working on the latest 31-rc5 tree, btw.
PS. Can't get an ide based 2.6.31-rc5 kernel to boot in F11, though it doesn't seem to be related to ide. I probably have something wrong in my .config.
Thanks, ben
-- Ben Greear <greearb@candelatech.com> Candela Technologies Inc http://www.candelatech.com
|  |