On 08/04/2010 11:50 AM, Pawel Osciak wrote:
How do you propose to allocate the buffers? They need to be contiguous
and using uncached memory gave really bad performance.
829440 bytes is a quite a lot and one can't reliably depend on kmalloc
to be able to allocate such big chunks of contiguous memory. Were you
testing this on a freshly rebooted system?
The systems have been running for a while, but not days.
I don't see why would dma_alloc_coherent work better than kmalloc?
I suppose bootmem could be used, or allocate the buffers at startup before memory gets fragmented.
--Richard
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