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Re: [PATCH v6 14/14] mm: Add basic tests for lazy_mmu
- To: Kevin Brodsky <kevin.brodsky@xxxxxxx>
- From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
- Date: Tue, 16 Dec 2025 20:14:03 -0800
- Cc: linux-mm@xxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, Alexander Gordeev <agordeev@xxxxxxxxxxxxx>, Andreas Larsson <andreas@xxxxxxxxxxx>, Anshuman Khandual <anshuman.khandual@xxxxxxx>, 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>, "Ritesh Harjani (IBM)" <ritesh.list@xxxxxxxxx>, Ryan Roberts <ryan.roberts@xxxxxxx>, Suren Baghdasaryan <surenb@xxxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Venkat Rao Bagalkote <venkat88@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: Wed, 17 Dec 2025 04:14:30 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On Mon, 15 Dec 2025 15:03:23 +0000 Kevin Brodsky <kevin.brodsky@xxxxxxx> wrote:
> Add basic KUnit tests for the generic aspects of the lazy MMU mode:
> ensure that it appears active when it should, depending on how
> enable/disable and pause/resume pairs are nested.
I needed this for powerpc allmodconfig;
--- a/arch/powerpc/mm/book3s64/hash_tlb.c~mm-add-basic-tests-for-lazy_mmu-fix
+++ a/arch/powerpc/mm/book3s64/hash_tlb.c
@@ -30,6 +30,7 @@
#include <trace/events/thp.h>
DEFINE_PER_CPU(struct ppc64_tlb_batch, ppc64_tlb_batch);
+EXPORT_SYMBOL_GPL(ppc64_tlb_batch);
/*
* A linux PTE was changed and the corresponding hash table entry
@@ -154,6 +155,7 @@ void __flush_tlb_pending(struct ppc64_tl
flush_hash_range(i, local);
batch->index = 0;
}
+EXPORT_SYMBOL_GPL(__flush_tlb_pending);
void hash__tlb_flush(struct mmu_gather *tlb)
{
_
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