Re: PCI-DMA: Disabling IOMMU

[Muli Ben-Yehuda]

On Wed, Oct 18, 2006 at 05:03:36PM +0200, Sebastian Biallas wrote:

> Should I worry about this IOMMU-disabling? All other Linux/IOMMU stuff I
> found had AGP or BIOS messages nearby, but I only get this single
> "PCI-DMA: Disabling IOMMU" line, without any hint.

No, it's fine. Just a badly worded information message. Andi, how
about something like this?

Print a less alarming information message when we don't use GART

Signed-off-by: Muli Ben-Yehuda <muli@xxxxxxxxxx>

diff -r 3f7bc84201e7 arch/x86_64/kernel/pci-gart.c
--- a/arch/x86_64/kernel/pci-gart.c	Wed Oct 18 09:14:19 2006 +0200
+++ b/arch/x86_64/kernel/pci-gart.c	Wed Oct 18 23:13:05 2006 +0200
@@ -601,7 +601,7 @@ void __init gart_iommu_init(void)
 	    (!force_iommu && end_pfn <= MAX_DMA32_PFN) ||
 	    !iommu_aperture ||
 	    (no_agp && init_k8_gatt(&info) < 0)) {
-		printk(KERN_INFO "PCI-DMA: Disabling IOMMU.\n");
+		printk(KERN_INFO "PCI-DMA: Not using GART IOMMU.\n");
 		if (end_pfn > MAX_DMA32_PFN) {
 			printk(KERN_ERR "WARNING more than 4GB of memory "
 					"but IOMMU not available.\n"
-
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