Messages in this thread | | | Date | Thu, 24 Jun 1999 12:33:01 +0200 (MEST) | From | Jaroslav Kysela <> | Subject | Re: DMA page allocation |
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On Sun, 20 Jun 1999, Douglas Gilbert wrote:
> I spent yesterday testing out my sg device driver with > Jaroslav's DMA page allocation patch. A discussion of > the tests and the results (with a section on memory > issues) can be found at: > http://www.torque.net/sg/s_index.html > > Basically it all went very well. However for my test > configuration the 2 MB chosen for the DMA page pool > size wasn't quite enough. So I think we need the kernel > parameters as suggested by Dan Hollis. > > Also the implementation seems to give up when the > 2 MB is exhausted without checking the main pool. > [Hopefully I'm wrong here]. > > This patch is obviously not architecturely independent > so we need to think how to handle this. For example, > the second page pool (for DMA) is only generated on > architectures that need it.
I made this WWW page about this problem:
http://www.alsa-project.org/~perex/page_alloc.html.
Jaroslav
----- Jaroslav Kysela <perex@suse.cz> SuSE Linux http://www.suse.com ALSA project http://www.alsa-project.org
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