On 24/10/2025 16:47, David Woodhouse wrote:

On Thu, 2025-10-23 at 22:06 +0200, David Hildenbrand wrote:

quoted

On 15.10.25 10:27, Kevin Brodsky wrote:

quoted

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 <redacted>
---

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