intel-iommu: Defer the iotlb flush and iova free for intel_unmap_sg() too.
I see no reason why we did this _only_ in intel_unmap_page().
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c
index d6a8573..ee48fd0 100644
--- a/drivers/pci/intel-iommu.c
+++ b/drivers/pci/intel-iommu.c
@@ -2815,11 +2815,18 @@
/* free page tables */
dma_pte_free_pagetable(domain, start_pfn, last_pfn);
- iommu_flush_iotlb_psi(iommu, domain->id, start_pfn,
- (last_pfn - start_pfn + 1));
-
- /* free iova */
- __free_iova(&domain->iovad, iova);
+ if (intel_iommu_strict) {
+ iommu_flush_iotlb_psi(iommu, domain->id, start_pfn,
+ last_pfn - start_pfn + 1);
+ /* free iova */
+ __free_iova(&domain->iovad, iova);
+ } else {
+ add_unmap(domain, iova);
+ /*
+ * queue up the release of the unmap to save the 1/6th of the
+ * cpu used up by the iotlb flush operation...
+ */
+ }
}
static int intel_nontranslate_map_sg(struct device *hddev,