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Re: [PATCH v4 07/12] mm: enable lazy_mmu sections to nest
- To: Alexander Gordeev <agordeev@xxxxxxxxxxxxx>
- From: Ritesh Harjani (IBM) <ritesh.list@xxxxxxxxx>
- Date: Thu, 06 Nov 2025 22:31:27 +0530
- Cc: Kevin Brodsky <kevin.brodsky@xxxxxxx>, 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>, David Woodhouse <dwmw2@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: Thu, 06 Nov 2025 17:09:13 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
Ritesh Harjani (IBM) <ritesh.list@xxxxxxxxx> writes:
> For e.g...
>
> arch_enter_lazy_mmu_mode()
> hpte_need_flush()
> get_cpu_var() // this takes care of preempt_disable()
> adds vpns to per-cpu batch[i]
> put_cpu_var() //
> arch_leave_lazy_mmu_mode()
>
Sorry, here is the more accurate call sequence for previous email.
caller()...
arch_enter_lazy_mmu_mode()
ptep_xxx_()
pte_update()
hpte_need_flush()
get_cpu_var() // this takes care of preempt_disable()
adds vpns to per-cpu batch[i]
put_cpu_var() //
arch_leave_lazy_mmu_mode()
-ritesh
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