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Re: [PATCH 2/7] mm: introduce local state for lazy_mmu sections
- To: Kevin Brodsky <kevin.brodsky@xxxxxxx>
- From: Yeoreum Yun <yeoreum.yun@xxxxxxx>
- Date: Thu, 4 Sep 2025 16:06:33 +0100
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- Cc: linux-mm@xxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, Alexander Gordeev <agordeev@xxxxxxxxxxxxx>, 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>, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx, linuxppc-dev@xxxxxxxxxxxxxxxx, sparclinux@xxxxxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Fri, 05 Sep 2025 19:14:58 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Nodisclaimer: true
Hi Kevin,
[...]
> Signed-off-by: Kevin Brodsky <kevin.brodsky@xxxxxxx>
> ---
> arch/arm64/include/asm/pgtable.h | 10 +++++++---
> .../include/asm/book3s/64/tlbflush-hash.h | 9 ++++++---
> arch/powerpc/mm/book3s64/hash_tlb.c | 10 ++++++----
> arch/powerpc/mm/book3s64/subpage_prot.c | 5 +++--
> arch/sparc/include/asm/tlbflush_64.h | 5 +++--
> arch/sparc/mm/tlb.c | 6 ++++--
> arch/x86/include/asm/paravirt.h | 6 ++++--
> arch/x86/include/asm/paravirt_types.h | 2 ++
> arch/x86/xen/enlighten_pv.c | 2 +-
> arch/x86/xen/mmu_pv.c | 2 +-
> fs/proc/task_mmu.c | 5 +++--
> include/linux/mm_types.h | 3 +++
> include/linux/pgtable.h | 6 ++++--
> mm/madvise.c | 20 ++++++++++---------
> mm/memory.c | 20 +++++++++++--------
> mm/migrate_device.c | 5 +++--
> mm/mprotect.c | 5 +++--
> mm/mremap.c | 5 +++--
> mm/vmalloc.c | 15 ++++++++------
> mm/vmscan.c | 15 ++++++++------
> 20 files changed, 97 insertions(+), 59 deletions(-)
I think you miss the mm/kasan/shadow.c
But here, the usage is like:
static int kasan_populate_vmalloc_pte()
{
...
arch_leave_lazy_mmu_mode();
...
arch_enter_lazy_mmu_mode();
...
}
Might be you can call the arch_leave_lazy_mmu_mode() with LAZY_MMU_DEFAULT
in here since I think kasan_populate_vmalloc_pte() wouldn't be called
nestly.
[...]
Thanks.
--
Sincerely,
Yeoreum Yun
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