Messages in this thread | | | Date | Mon, 28 Jan 2002 14:51:54 +0100 | From | Kristian <> | Subject | Re: [CFT] Bus mastering support for IDE CDROM audio |
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Andrew Morton <akpm@zip.com.au> wrote: > OK, Gents. Version three is at > > http://www.zip.com.au/~akpm/linux/2.4/2.4.18-pre7/ide-akpm-3.patch > > This attempts to overcome the situation where a drive/controller > doesn't want to perform multiframe DMA, but is happy performing > single-frame DMA. > [...]
The third patch works fine.
When I'm doing "hdparm -c0 /dev/hdc" (16bit I/O) the system respond-ratio gets very low. (with all ide-cd-patches) I can see when gtk draws it's icons... But when I switch I/O back to 32 bit linux gets responsive again and cpu load decreases (~20%).
Tested with 2.4.18-pre3-ac2 and 2.4.17-lowlat-ide.
*Kristian
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