On Sun, Apr 04, 2010 at 09:24:30AM +0200, Bernhard Walle wrote: > Am 03.04.10 19:49, schrieb Eric W. Biederman: > > Not a problem. We require a lot of things of the kdump kernel, > > and it is immediately apparent in a basic sanity test. > > Also, in most cases (for example: distribution kernels), the kdump > kernel nowadays is identical to the running kernel. So, if the running > kernel has IOMMU support, the kdump kernel also has. Yes, I know. But is that a requirement for kexec? If not we still potentially have this problem. It is a smaller problem than data-corruption caused by in-flight dma because most people^Wdistributions indeed use the same kernel for normal boot and kexec, thats true. Joerg
