On Sun, Apr 04, 2010 at 02:44:36AM -0700, Eric W. Biederman wrote: > Joerg Roedel <joro at 8bytes.org> writes: > > > 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? > > For normal kexec no. That path is expected to do a clean hardware > shutdown. > > For kexec on panic aka kdump the requirement is that your your crash > kernel be able to initialize your hardware from any state it can be > put in. Ok, if you show me where this is documented for everybody then I am probably convinced :-) We should fixup the gart initialization anyway. Joerg
