swiotlb default size (64 MB) too small?

From: Stefan Richter
Date: Tue Jan 20 2009 - 15:11:30 EST


somebody reported frequent "Out of SW-IOMMU space" failures when copying
between a FireWire and a USB disk. swiotlb=512M on the kernel command
line fixes it for him. https://bugzilla.redhat.com/show_bug.cgi?id=478567

Should the default be raised?
Stefan Richter
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