linux-kernel - Re: [PATCH v6 03/14] powerpc/mm: implement arch_flush_lazy_mmu

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Message-ID: <87345b6m9m.ritesh.list@gmail.com>
Date: Tue, 16 Dec 2025 10:44:45 +0530
From: Ritesh Harjani (IBM) <ritesh.list@...il.com>
To: Kevin Brodsky <kevin.brodsky@....com>, linux-mm@...ck.org
Cc: linux-kernel@...r.kernel.org, Kevin Brodsky <kevin.brodsky@....com>, 
	Alexander Gordeev <agordeev@...ux.ibm.com>, Andreas Larsson <andreas@...sler.com>, 
	Andrew Morton <akpm@...ux-foundation.org>, Anshuman Khandual <anshuman.khandual@....com>, 
	Boris Ostrovsky <boris.ostrovsky@...cle.com>, Borislav Petkov <bp@...en8.de>, 
	Catalin Marinas <catalin.marinas@....com>, Christophe Leroy <christophe.leroy@...roup.eu>, 
	Dave Hansen <dave.hansen@...ux.intel.com>, David Hildenbrand <david@...hat.com>, 
	"David S. Miller" <davem@...emloft.net>, David Woodhouse <dwmw2@...radead.org>, 
	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...hat.com>, Jann Horn <jannh@...gle.com>, 
	Juergen Gross <jgross@...e.com>, "Liam R. Howlett" <Liam.Howlett@...cle.com>, 
	Lorenzo Stoakes <lorenzo.stoakes@...cle.com>, Madhavan Srinivasan <maddy@...ux.ibm.com>, 
	Michael Ellerman <mpe@...erman.id.au>, Michal Hocko <mhocko@...e.com>, Mike Rapoport <rppt@...nel.org>, 
	Nicholas Piggin <npiggin@...il.com>, Peter Zijlstra <peterz@...radead.org>, 
	Ryan Roberts <ryan.roberts@....com>, Suren Baghdasaryan <surenb@...gle.com>, 
	Thomas Gleixner <tglx@...utronix.de>, Venkat Rao Bagalkote <venkat88@...ux.ibm.com>, 
	Vlastimil Babka <vbabka@...e.cz>, Will Deacon <will@...nel.org>, Yeoreum Yun <yeoreum.yun@....com>, 
	linux-arm-kernel@...ts.infradead.org, linuxppc-dev@...ts.ozlabs.org, 
	sparclinux@...r.kernel.org, xen-devel@...ts.xenproject.org, x86@...nel.org
Subject: Re: [PATCH v6 03/14] powerpc/mm: implement arch_flush_lazy_mmu_mode()

Kevin Brodsky <kevin.brodsky@....com> writes:

> Upcoming changes to the lazy_mmu API will cause
> arch_flush_lazy_mmu_mode() to be called when leaving a nested
> lazy_mmu section.
>
> Move the relevant logic from arch_leave_lazy_mmu_mode() to
> arch_flush_lazy_mmu_mode() and have the former call the latter. The
> radix_enabled() check is required in both as
> arch_flush_lazy_mmu_mode() will be called directly from the generic
> layer in a subsequent patch.
>
> Note: the additional this_cpu_ptr() and radix_enabled() calls on the
> arch_leave_lazy_mmu_mode() path will be removed in a subsequent
> patch.
>
> Acked-by: David Hildenbrand <david@...hat.com>
> Tested-by: Venkat Rao Bagalkote <venkat88@...ux.ibm.com>
> Signed-off-by: Kevin Brodsky <kevin.brodsky@....com>
> ---
>  .../powerpc/include/asm/book3s/64/tlbflush-hash.h | 15 ++++++++++++---
>  1 file changed, 12 insertions(+), 3 deletions(-)

Sorry I was away for a while. 

Thanks for taking care of the radix path as we had discussed previously
here [1]. 

[1]: https://lore.kernel.org/all/87jz044xn4.ritesh.list@gmail.com/

The change looks good to me. So, please feel free to add:

Reviewed-by: Ritesh Harjani (IBM) <ritesh.list@...il.com>