On 07/30/2010 09:53 AM, David Woodhouse wrote: > On Thu, 2010-07-29 at 21:41 -0700, Eric W. Biederman wrote: >> There isn't a bus master shut off at the core level. > > Effectively, there is if you have an IOMMU. With the "core level" I meant Linux kernel code, as opposed to hardware level which is slightly different; I meant it would make sense to at least set the bus master control bit (PCI_COMMAND_MASTER) to zero before kexec. I also agree that reboot and kexec are different; the requirements for kexec are really much more strict. -hpa
