Attachment 161206 Details for Bug 219216 – quiet down the kernel

quiet down the kernel

swiotlb-xen-flood.patch (text/x-patch), 1.27 KB, created by Rik van Riel on 2007-08-13 19:20:58 UTC

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Creator: Rik van Riel

Created: 2007-08-13 19:20:58 UTC

Size: 1.27 KB

patch

obsolete

>--- linux-2.6.18.noarch/arch/i386/kernel/swiotlb.c.flood	2007-08-13 14:59:05.000000000 -0400
>+++ linux-2.6.18.noarch/arch/i386/kernel/swiotlb.c	2007-08-13 15:03:18.000000000 -0400
>@@ -397,14 +397,23 @@ static void
> swiotlb_full(struct device *dev, size_t size, int dir, int do_panic)
> {
> 	/*
>+	 * Some drivers fill up IOMMU space on purpose.  Do not flood
>+	 * the logs with warnings.  If another driver cannot handle
>+	 * this and panics, the system log still has enough messages
>+	 * to figure out what went wrong.
>+	 */
>+	static int warning = 0;
>+
>+	/*
> 	 * Ran out of IOMMU space for this operation. This is very bad.
> 	 * Unfortunately the drivers cannot handle this operation properly.
> 	 * unless they check for pci_dma_mapping_error (most don't)
> 	 * When the mapping is small enough return a static buffer to limit
> 	 * the damage, or panic when the transfer is too big.
> 	 */
>-	printk(KERN_ERR "PCI-DMA: Out of SW-IOMMU space for %lu bytes at "
>-	       "device %s\n", (unsigned long)size, dev ? dev->bus_id : "?");
>+	if (warning++ < 5)
>+		printk(KERN_ERR "PCI-DMA: Out of SW-IOMMU space for %lu bytes at "
>+		       "device %s\n", (unsigned long)size, dev ? dev->bus_id : "?");
> 
> 	if (size > io_tlb_overflow && do_panic) {
> 		if (dir == PCI_DMA_FROMDEVICE || dir == PCI_DMA_BIDIRECTIONAL)

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Attachments on bug 219216: 143455 | 143956 | 143957 | 144043 | 161206