Re: [PATCH v5 12/12] x86/xen: use lazy_mmu_state when context-switching

[PATCH v5 00/12] Nesting support for lazy MMU mode · Kevin Brodsky <hidden> · 2025-11-24
[PATCH v5 01/12] powerpc/64s: Do not re-activate batched TLB flush · Kevin Brodsky <hidden> · 2025-11-24
[PATCH v5 02/12] x86/xen: simplify flush_lazy_mmu() · Kevin Brodsky <hidden> · 2025-11-24
Re: [PATCH v5 02/12] x86/xen: simplify flush_lazy_mmu() · Anshuman Khandual <hidden> · 2025-12-04
[PATCH v5 03/12] powerpc/mm: implement arch_flush_lazy_mmu_mode() · Kevin Brodsky <hidden> · 2025-11-24
[PATCH v5 04/12] sparc/mm: implement arch_flush_lazy_mmu_mode() · Kevin Brodsky <hidden> · 2025-11-24
[PATCH v5 05/12] mm: introduce CONFIG_ARCH_HAS_LAZY_MMU_MODE · Kevin Brodsky <hidden> · 2025-11-24
Re: [PATCH v5 05/12] mm: introduce CONFIG_ARCH_HAS_LAZY_MMU_MODE · Anshuman Khandual <hidden> · 2025-12-01
Re: [PATCH v5 05/12] mm: introduce CONFIG_ARCH_HAS_LAZY_MMU_MODE · Kevin Brodsky <hidden> · 2025-12-03
[PATCH v5 06/12] mm: introduce generic lazy_mmu helpers · Kevin Brodsky <hidden> · 2025-11-24
Re: [PATCH v5 06/12] mm: introduce generic lazy_mmu helpers · Alexander Gordeev <agordeev@linux.ibm.com> · 2025-11-28
Re: [PATCH v5 06/12] mm: introduce generic lazy_mmu helpers · Kevin Brodsky <hidden> · 2025-12-03
Re: [PATCH v5 06/12] mm: introduce generic lazy_mmu helpers · Anshuman Khandual <hidden> · 2025-12-04
Re: [PATCH v5 06/12] mm: introduce generic lazy_mmu helpers · Kevin Brodsky <hidden> · 2025-12-05
[PATCH v5 07/12] mm: bail out of lazy_mmu_mode_* in interrupt context · Kevin Brodsky <hidden> · 2025-11-24
Re: [PATCH v5 07/12] mm: bail out of lazy_mmu_mode_* in interrupt context · "David Hildenbrand (Red Hat)" <david@kernel.org> · 2025-11-24
Re: [PATCH v5 07/12] mm: bail out of lazy_mmu_mode_* in interrupt context · Anshuman Khandual <hidden> · 2025-12-04
[PATCH v5 08/12] mm: enable lazy_mmu sections to nest · Kevin Brodsky <hidden> · 2025-11-24
Re: [PATCH v5 08/12] mm: enable lazy_mmu sections to nest · "David Hildenbrand (Red Hat)" <david@kernel.org> · 2025-11-24
Re: [PATCH v5 08/12] mm: enable lazy_mmu sections to nest · Alexander Gordeev <agordeev@linux.ibm.com> · 2025-11-27
Re: [PATCH v5 08/12] mm: enable lazy_mmu sections to nest · Kevin Brodsky <hidden> · 2025-11-27
Re: [PATCH v5 08/12] mm: enable lazy_mmu sections to nest · Alexander Gordeev <agordeev@linux.ibm.com> · 2025-11-28
Re: [PATCH v5 08/12] mm: enable lazy_mmu sections to nest · Kevin Brodsky <hidden> · 2025-12-03
Re: [PATCH v5 08/12] mm: enable lazy_mmu sections to nest · Anshuman Khandual <hidden> · 2025-12-04
Re: [PATCH v5 08/12] mm: enable lazy_mmu sections to nest · "David Hildenbrand (Red Hat)" <david@kernel.org> · 2025-12-04
Re: [PATCH v5 08/12] mm: enable lazy_mmu sections to nest · Anshuman Khandual <hidden> · 2025-12-04
Re: [PATCH v5 08/12] mm: enable lazy_mmu sections to nest · "David Hildenbrand (Red Hat)" <david@kernel.org> · 2025-12-04
Re: [PATCH v5 08/12] mm: enable lazy_mmu sections to nest · Kevin Brodsky <hidden> · 2025-12-05
Re: [PATCH v5 08/12] mm: enable lazy_mmu sections to nest · Kevin Brodsky <hidden> · 2025-12-05
[PATCH v5 09/12] arm64: mm: replace TIF_LAZY_MMU with in_lazy_mmu_mode() · Kevin Brodsky <hidden> · 2025-11-24
Re: [PATCH v5 09/12] arm64: mm: replace TIF_LAZY_MMU with in_lazy_mmu_mode() · "David Hildenbrand (Red Hat)" <david@kernel.org> · 2025-11-24
Re: [PATCH v5 09/12] arm64: mm: replace TIF_LAZY_MMU with in_lazy_mmu_mode() · Anshuman Khandual <hidden> · 2025-12-04
Re: [PATCH v5 09/12] arm64: mm: replace TIF_LAZY_MMU with in_lazy_mmu_mode() · "David Hildenbrand (Red Hat)" <david@kernel.org> · 2025-12-04
[PATCH v5 10/12] powerpc/mm: replace batch->active with in_lazy_mmu_mode() · Kevin Brodsky <hidden> · 2025-11-24
[PATCH v5 11/12] sparc/mm: replace batch->active with in_lazy_mmu_mode() · Kevin Brodsky <hidden> · 2025-11-24
[PATCH v5 12/12] x86/xen: use lazy_mmu_state when context-switching · Kevin Brodsky <hidden> · 2025-11-24
Re: [PATCH v5 12/12] x86/xen: use lazy_mmu_state when context-switching · "David Hildenbrand (Red Hat)" <david@kernel.org> · 2025-11-24
Re: [PATCH v5 12/12] x86/xen: use lazy_mmu_state when context-switching · Jürgen Groß <jgross@suse.com> · 2025-11-25
Re: [PATCH v5 00/12] Nesting support for lazy MMU mode · Venkat <hidden> · 2025-12-03
Re: [PATCH v5 00/12] Nesting support for lazy MMU mode · Kevin Brodsky <hidden> · 2025-12-05

From: "David Hildenbrand (Red Hat)" <david@kernel.org>
Date: 2025-11-24 14:18:15
Also in: linux-arm-kernel, linux-mm, lkml, sparclinux, xen-devel

On 11/24/25 14:22, 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>
---

Nothing jumped at me, hoping for another pair of eyes from the XEN folks

Acked-by: David Hildenbrand (Red Hat) <david@kernel.org>

-- 
Cheers

David

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