Re: contiguous memory allocation problem

FreeBSD's strategy for doing page coloring makes contiguous memory
allocation much past boot quite difficult. This will change when
generalized superpage support is brought in (I hope in the near
future).

-Kip

On 6/30/06, Hans Petter Selasky <hselasky@xxxxxxx> wrote:
Hi,

I sometimes see that the USB driver is unable to allocate contiguous memory
for itself. For example I noticed that FreeBSD was unable to allocate
350kbytes of contiguous memory after that I had run "konqueror", the KDE web
browser and various other memory consuming applications for a while.

I am thinking about pre-allocating some memory for USB, but isn't that the job
of bus-dma, which the USB system uses for memory allocation?

The machine in question is running FreeBSD 7-current from April.

Any comments?

Thanks,
--HPS
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