Messages in this thread |  | | From | Albert Cahalan <> | Subject | Re: Please Advise: SCSI vs. IDE | Date | Mon, 30 Sep 1996 19:14:13 -0400 (EDT) |
| |
> With ISA busmasters, the kernel has to double-buffer the IO memory for > the 16MB+ area, which makes the whole idea with DMA fail completely. > The extra copy is _worse_ than the CPU doing the reading by hand in > the first place.
That should not happen if the kernel was compiled with the 16 MB RAM limit. Until I grepped the kernel source, I thought that config option would get rid of the double-buffer overhead.
|  |