From: Arnd Bergmann <arnd@xxxxxxxx> Date: Tue, 2 Mar 2010 14:54:11 +0100 > Broken in the sense that arch/powerpc/Kconfig describes CONFIG_IOMMU_VMERGE: > > Cause IO segments sent to a device for DMA to be merged virtually > by the IOMMU when they happen to have been allocated contiguously. > This doesn't add pressure to the IOMMU allocator. However, some > drivers don't support getting large merged segments coming back > from *_map_sg(). > > Most drivers don't have this problem; it is safe to say Y here. > > I don't know if this comment still applies to any drivers in the mainline > kernel, but it's possible. That really has to be out of date these days. -- To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
