Re: DMA memory allocation problems + patch

Michael L. Galbraith (mikeg@weiden.de)
Thu, 27 Aug 1998 07:47:53 +0200 (CEST)


On Wed, 26 Aug 1998, Francis Devereux wrote:

> Hi,
>
> In kernels 2.1.11[357] I have had problems playing sounds after loading
> large applications (e.g. X, netscape) due to problems allocating DMA
> buffers. I have an ISA SB AWE64 and 64M of RAM.
>

Hi,

Maybe Bill Hawes' Defrag-O-Matic patch is the complete fix. I did some
testing with it, and always had high order memory available in plenty
even when stress testing with little ram enabled.

I was testing mostly with <=16 meg enabled, so I presume that getting
a large DMA chunk wouldn't have been a problem. I didn't actually test
that though.

-Mike

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.altern.org/andrebalsa/doc/lkml-faq.html