On Sun, 2009-03-01 at 10:24 -0800, Trent Piepho wrote: > On Sun, 1 Mar 2009, Hans Verkuil wrote: > > > Even though kmalloc supports higher order allocations now, they can > > > easily fail. > > > > The right approach which most drivers take is to allocate up front when the > > driver is loaded. Zoran should be modified to do the same. > > Still, it's a shame to waste the memory when the driver is not in use. > There is a patch that was posted to the mjpeg list that converts the driver > to use the pci dma api. There is something that _is_ in the kernel called > swiotlb that might serve as a replacement for what bigphys_area did.
I don't know what bigphys_area did, but swiotlb is enabled when you don't have a hardware IOMMU, IIRC. This will show up in dmesg as: "PCI-DMA: Using software bounce buffering for IO (SWIOTLB)" and the kernel will end up doing memcpy()'s for you. Regards, Andy -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
