DMA bounce buffers

Barney Cordoba barney_cordoba at
Mon Jan 26 05:05:11 PST 2009

I have a problem with the ixgbe driver, where bus_dmamap_load_mbuf_sg() is
failing. The underlying failure is reserve_bounce_pages(). It seems that 
there aren't any bounce pages allocated. What could be the cause of this? Is there some tunable?



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