On Fri, Mar 27, 2020 at 11:11:33PM -0500, John Donnelly wrote: > > Hi, > > I am seeing this WARNING event with iommu=off when booting a DL380 server with a 5.4.17 kernel. > > > > [ 7.292703] ehci-pci 0000:00:1a.0: swiotlb buffer is full (sz: 8 bytes), total 0 (slots), used 0 (slots) > [ 7.309834] ehci-pci 0000:00:1a.0: overflow 0x0000000a1c8f9a60+8 of DMA mask ffffffff bus limit 0 > [ 7.325937] ------------[ cut here ]------------ So your system really wants the iommu enabled, I would stick with doing that :) thanks, greg k-h
