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Re: [PATCH v3 06/13] mm: introduce generic lazy_mmu helpers
- To: Kevin Brodsky <kevin.brodsky@xxxxxxx>
- From: Alexander Gordeev <agordeev@xxxxxxxxxxxxx>
- Date: Fri, 17 Oct 2025 17:54:14 +0200
- Cc: linux-mm@xxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, Andreas Larsson <andreas@xxxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>, Borislav Petkov <bp@xxxxxxxxx>, Catalin Marinas <catalin.marinas@xxxxxxx>, Christophe Leroy <christophe.leroy@xxxxxxxxxx>, Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>, David Hildenbrand <david@xxxxxxxxxx>, "David S. Miller" <davem@xxxxxxxxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Jann Horn <jannh@xxxxxxxxxx>, Juergen Gross <jgross@xxxxxxxx>, "Liam R. Howlett" <Liam.Howlett@xxxxxxxxxx>, Lorenzo Stoakes <lorenzo.stoakes@xxxxxxxxxx>, Madhavan Srinivasan <maddy@xxxxxxxxxxxxx>, Michael Ellerman <mpe@xxxxxxxxxxxxxx>, Michal Hocko <mhocko@xxxxxxxx>, Mike Rapoport <rppt@xxxxxxxxxx>, Nicholas Piggin <npiggin@xxxxxxxxx>, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, Ryan Roberts <ryan.roberts@xxxxxxx>, Suren Baghdasaryan <surenb@xxxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Vlastimil Babka <vbabka@xxxxxxx>, Will Deacon <will@xxxxxxxxxx>, Yeoreum Yun <yeoreum.yun@xxxxxxx>, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx, linuxppc-dev@xxxxxxxxxxxxxxxx, sparclinux@xxxxxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx, x86@xxxxxxxxxx
- Delivery-date: Fri, 17 Oct 2025 15:55:25 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On Wed, Oct 15, 2025 at 09:27:20AM +0100, Kevin Brodsky wrote:
Hi Kevin,
...
> * lazy_mmu_mode_pause() ... lazy_mmu_mode_resume()
> This is for situations where the mode is temporarily disabled
> by first calling pause() and then resume() (e.g. to prevent any
> batching from occurring in a critical section).
...
> +static inline void lazy_mmu_mode_pause(void)
> +{
> + arch_leave_lazy_mmu_mode();
I think it should have been arch_pause_lazy_mmu_mode(), wich defaults
to arch_leave_lazy_mmu_mode(), as we discussed in v2:
https://lore.kernel.org/linux-mm/d407a381-099b-4ec6-a20e-aeff4f3d750f@xxxxxxx/#t
> +}
> +
> +static inline void lazy_mmu_mode_resume(void)
> +{
> + arch_enter_lazy_mmu_mode();
> +}
Thanks!
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