linux-kernel - Re: [PATCH v5 08/12] mm: enable lazy

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Message-ID: <2c2b3382-7bdb-41a9-b48e-4fa9a44312ba@arm.com>
Date: Thu, 4 Dec 2025 10:55:51 +0530
From: Anshuman Khandual <anshuman.khandual@....com>
To: Kevin Brodsky <kevin.brodsky@....com>,
 Alexander Gordeev <agordeev@...ux.ibm.com>
Cc: linux-mm@...ck.org, linux-kernel@...r.kernel.org,
 Andreas Larsson <andreas@...sler.com>,
 Andrew Morton <akpm@...ux-foundation.org>,
 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>,
 "Ritesh Harjani (IBM)" <ritesh.list@...il.com>,
 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 v5 08/12] mm: enable lazy_mmu sections to nest

On 03/12/25 1:50 PM, Kevin Brodsky wrote:
> On 28/11/2025 14:55, Alexander Gordeev wrote:
>>> + * in_lazy_mmu_mode() can be used to check whether the lazy MMU mode is
>>> + * currently enabled.
>> The in_lazy_mmu_mode() name looks ambiguous to me. When the lazy MMU mode
>> is paused are we still in lazy MMU mode? The __task_lazy_mmu_mode_active()
>> implementation suggests we are not, while one could still assume we are,
>> just paused.
>>
>> Should in_lazy_mmu_mode() be named e.g. as in_active_lazy_mmu_mode() such
>> a confusion would not occur in the first place.
> 
> I see your point, how about is_lazy_mmu_mode_active()?

Agreed - is_lazy_mmu_mode_active() seems better.