Commit fe16f088 authored May 22, 2009 by Joerg Roedel

amd-iommu: disable round-robin allocator for CONFIG_IOMMU_STRESS



Disabling the round-robin allocator results in reusing the same
dma-addresses again very fast. This is a good test if the iotlb flushing
is working correctly.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

parent d9cfed92

arch/x86/kernel/amd_iommu.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -783,6 +783,11 @@ static unsigned long dma_ops_alloc_addresses(struct device *dev,
		{
		unsigned long address;

		#ifdef CONFIG_IOMMU_STRESS
		dom->next_address = 0;
		dom->need_flush = true;
		#endif

		address = dma_ops_area_alloc(dev, dom, pages, align_mask,
		dma_mask, dom->next_address);