Re: [PATCH v3 11/13] x86/xen: use lazy_mmu_state when context-switching

[PATCH v3 00/13] Nesting support for lazy MMU mode · Kevin Brodsky <hidden> · 2025-10-15
[PATCH v3 01/13] powerpc/64s: Do not re-activate batched TLB flush · Kevin Brodsky <hidden> · 2025-10-15
[PATCH v3 02/13] x86/xen: simplify flush_lazy_mmu() · Kevin Brodsky <hidden> · 2025-10-15
Re: [PATCH v3 02/13] x86/xen: simplify flush_lazy_mmu() · Dave Hansen <hidden> · 2025-10-15
Re: [PATCH v3 02/13] x86/xen: simplify flush_lazy_mmu() · Kevin Brodsky <hidden> · 2025-10-16
[PATCH v3 03/13] powerpc/mm: implement arch_flush_lazy_mmu_mode() · Kevin Brodsky <hidden> · 2025-10-15
Re: [PATCH v3 03/13] powerpc/mm: implement arch_flush_lazy_mmu_mode() · David Hildenbrand <hidden> · 2025-10-23
Re: [PATCH v3 03/13] powerpc/mm: implement arch_flush_lazy_mmu_mode() · Kevin Brodsky <hidden> · 2025-10-24
Re: [PATCH v3 03/13] powerpc/mm: implement arch_flush_lazy_mmu_mode() · David Hildenbrand <hidden> · 2025-10-24
Re: [PATCH v3 03/13] powerpc/mm: implement arch_flush_lazy_mmu_mode() · Kevin Brodsky <hidden> · 2025-10-24
[PATCH v3 04/13] sparc/mm: implement arch_flush_lazy_mmu_mode() · Kevin Brodsky <hidden> · 2025-10-15
Re: [PATCH v3 04/13] sparc/mm: implement arch_flush_lazy_mmu_mode() · David Hildenbrand <hidden> · 2025-10-23
[PATCH v3 05/13] mm: introduce CONFIG_ARCH_LAZY_MMU · Kevin Brodsky <hidden> · 2025-10-15
Re: [PATCH v3 05/13] mm: introduce CONFIG_ARCH_LAZY_MMU · Mike Rapoport <rppt@kernel.org> · 2025-10-18
Re: [PATCH v3 05/13] mm: introduce CONFIG_ARCH_LAZY_MMU · Kevin Brodsky <hidden> · 2025-10-20
Re: [PATCH v3 05/13] mm: introduce CONFIG_ARCH_LAZY_MMU · David Hildenbrand <hidden> · 2025-10-23
[PATCH v3 06/13] mm: introduce generic lazy_mmu helpers · Kevin Brodsky <hidden> · 2025-10-15
Re: [PATCH v3 06/13] mm: introduce generic lazy_mmu helpers · Alexander Gordeev <agordeev@linux.ibm.com> · 2025-10-17
Re: [PATCH v3 06/13] mm: introduce generic lazy_mmu helpers · Kevin Brodsky <hidden> · 2025-10-20
Re: [PATCH v3 06/13] mm: introduce generic lazy_mmu helpers · David Hildenbrand <hidden> · 2025-10-23
Re: [PATCH v3 06/13] mm: introduce generic lazy_mmu helpers · Kevin Brodsky <hidden> · 2025-10-24
Re: [PATCH v3 06/13] mm: introduce generic lazy_mmu helpers · David Hildenbrand <hidden> · 2025-10-24
Re: [PATCH v3 06/13] mm: introduce generic lazy_mmu helpers · Kevin Brodsky <hidden> · 2025-10-24
Re: [PATCH v3 06/13] mm: introduce generic lazy_mmu helpers · David Hildenbrand <hidden> · 2025-10-27
Re: [PATCH v3 06/13] mm: introduce generic lazy_mmu helpers · Kevin Brodsky <hidden> · 2025-10-28
[PATCH v3 07/13] mm: enable lazy_mmu sections to nest · Kevin Brodsky <hidden> · 2025-10-15
Re: [PATCH v3 07/13] mm: enable lazy_mmu sections to nest · David Hildenbrand <hidden> · 2025-10-23
Re: [PATCH v3 07/13] mm: enable lazy_mmu sections to nest · Kevin Brodsky <hidden> · 2025-10-24
Re: [PATCH v3 07/13] mm: enable lazy_mmu sections to nest · David Hildenbrand <hidden> · 2025-10-24
Re: [PATCH v3 07/13] mm: enable lazy_mmu sections to nest · Kevin Brodsky <hidden> · 2025-10-24
[PATCH v3 08/13] arm64: mm: replace TIF_LAZY_MMU with in_lazy_mmu_mode() · Kevin Brodsky <hidden> · 2025-10-15
[PATCH v3 09/13] powerpc/mm: replace batch->active with in_lazy_mmu_mode() · Kevin Brodsky <hidden> · 2025-10-15
Re: [PATCH v3 09/13] powerpc/mm: replace batch->active with in_lazy_mmu_mode() · David Hildenbrand <hidden> · 2025-10-23
Re: [PATCH v3 09/13] powerpc/mm: replace batch->active with in_lazy_mmu_mode() · Kevin Brodsky <hidden> · 2025-10-24
[PATCH v3 10/13] sparc/mm: replace batch->active with in_lazy_mmu_mode() · Kevin Brodsky <hidden> · 2025-10-15
Re: [PATCH v3 10/13] sparc/mm: replace batch->active with in_lazy_mmu_mode() · David Hildenbrand <hidden> · 2025-10-23
[PATCH v3 11/13] x86/xen: use lazy_mmu_state when context-switching · Kevin Brodsky <hidden> · 2025-10-15
Re: [PATCH v3 11/13] x86/xen: use lazy_mmu_state when context-switching · David Hildenbrand <hidden> · 2025-10-23
Re: [PATCH v3 11/13] x86/xen: use lazy_mmu_state when context-switching · David Woodhouse <dwmw2@infradead.org> · 2025-10-24
Re: [PATCH v3 11/13] x86/xen: use lazy_mmu_state when context-switching · David Hildenbrand <hidden> · 2025-10-24
Re: [PATCH v3 11/13] x86/xen: use lazy_mmu_state when context-switching · David Woodhouse <dwmw2@infradead.org> · 2025-10-24
Re: [PATCH v3 11/13] x86/xen: use lazy_mmu_state when context-switching · David Hildenbrand <hidden> · 2025-10-24
Re: [PATCH v3 11/13] x86/xen: use lazy_mmu_state when context-switching · John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> · 2025-10-24
Re: [PATCH v3 11/13] x86/xen: use lazy_mmu_state when context-switching · David Hildenbrand <hidden> · 2025-10-24
Re: [PATCH v3 11/13] x86/xen: use lazy_mmu_state when context-switching · John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> · 2025-10-24
Re: [PATCH v3 11/13] x86/xen: use lazy_mmu_state when context-switching · David Hildenbrand <hidden> · 2025-10-27
Re: [PATCH v3 11/13] x86/xen: use lazy_mmu_state when context-switching · Demi Marie Obenour <hidden> · 2025-10-24
Re: [PATCH v3 11/13] x86/xen: use lazy_mmu_state when context-switching · David Hildenbrand <hidden> · 2025-10-27
Re: [PATCH v3 11/13] x86/xen: use lazy_mmu_state when context-switching · Kevin Brodsky <hidden> · 2025-10-27
Re: [PATCH v3 11/13] x86/xen: use lazy_mmu_state when context-switching · Kevin Brodsky <hidden> · 2025-10-24
Re: [PATCH v3 11/13] x86/xen: use lazy_mmu_state when context-switching · David Woodhouse <dwmw2@infradead.org> · 2025-10-24
Re: [PATCH v3 11/13] x86/xen: use lazy_mmu_state when context-switching · Kevin Brodsky <hidden> · 2025-10-27
[PATCH v3 12/13] mm: bail out of lazy_mmu_mode_* in interrupt context · Kevin Brodsky <hidden> · 2025-10-15
Re: [PATCH v3 12/13] mm: bail out of lazy_mmu_mode_* in interrupt context · David Hildenbrand <hidden> · 2025-10-23
Re: [PATCH v3 12/13] mm: bail out of lazy_mmu_mode_* in interrupt context · Kevin Brodsky <hidden> · 2025-10-24
[PATCH v3 13/13] mm: introduce arch_wants_lazy_mmu_mode() · Kevin Brodsky <hidden> · 2025-10-15
Re: [PATCH v3 13/13] mm: introduce arch_wants_lazy_mmu_mode() · David Hildenbrand <hidden> · 2025-10-23
Re: [PATCH v3 13/13] mm: introduce arch_wants_lazy_mmu_mode() · Kevin Brodsky <hidden> · 2025-10-24

From: David Hildenbrand <hidden>
Date: 2025-10-23 20:06:24
Also in: linux-arm-kernel, linux-mm, lkml, sparclinux, xen-devel

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 <redacted>
---


Looks ok to me, but I hope we get some confirmation from x86 / xen folks.

-- 
Cheers

David / dhildenb

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