On Tue, Apr 06, 2010 at 10:42:57AM -0700, Chris Wright wrote: > * Joerg Roedel (joro at 8bytes.org) wrote: > > 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. > > So, you planning to pull in all 4 patches then? Yes, I will apply them tomorrow and write a fix for the GART issue this may introduce. Joerg
