On 24/10/2025 16:47, David Woodhouse wrote: > On Thu, 2025-10-23 at 22:06 +0200, David Hildenbrand wrote: >> On 15.10.25 10:27, Kevin Brodsky wrote: >>> We currently set a TIF flag when scheduling out a task that is in >>> lazy MMU mode, in order to restore it when the task is scheduled >>> again. >>> >>> The generic lazy_mmu layer now tracks whether a task is in lazy MMU >>> mode in task_struct::lazy_mmu_state. We can therefore check that >>> state when switching to the new task, instead of using a separate >>> TIF flag. >>> >>> Signed-off-by: Kevin Brodsky <[email protected]> >>> --- >> >> Looks ok to me, but I hope we get some confirmation from x86 / xen >> folks. > > I know tglx has shouted at me in the past for precisely this reminder, > but you know you can test Xen guests under QEMU/KVM now and don't need > to actually run Xen? Has this been boot tested?
I considered boot-testing a Xen guest (considering the Xen-specific changes in this series), but having no idea how to go about it I quickly gave up... Happy to follow instructions :) - Kevin
