Messages in this thread | | | Subject | Re: why DMAable memory restriction ? | Date | Tue, 22 May 2001 19:13:36 +0100 (BST) | From | Alan Cox <> |
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> In the linux kernel there is a limitation on the > amount of contiguous DMAable memory that can be allocated > (I guess about 128K). Does anobody know what is the reason
128K or so , if you are lucky.
> for such a restriction ? Is there any plan to remove
Because the pages are contiguous so you have to find a suitable sized piece of free memory
> this restriction in the future releases of kernel ?
Nope. 2.4 adds bootmem though so badly designed hardware that is compiled in can grab memory early in biggish chunks.
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