linux-kernel - Re: [PATCH v2 0/4] Fixes for hugetlb and vmalloc on arm64

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Message-ID: <20250221153501.GD20567@willie-the-truck>
Date: Fri, 21 Feb 2025 15:35:02 +0000
From: Will Deacon <will@...nel.org>
To: Catalin Marinas <catalin.marinas@....com>
Cc: Ryan Roberts <ryan.roberts@....com>,
	Huacai Chen <chenhuacai@...nel.org>,
	WANG Xuerui <kernel@...0n.name>,
	Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
	"James E.J. Bottomley" <James.Bottomley@...senpartnership.com>,
	Helge Deller <deller@....de>,
	Madhavan Srinivasan <maddy@...ux.ibm.com>,
	Michael Ellerman <mpe@...erman.id.au>,
	Nicholas Piggin <npiggin@...il.com>,
	Christophe Leroy <christophe.leroy@...roup.eu>,
	Naveen N Rao <naveen@...nel.org>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>,
	Heiko Carstens <hca@...ux.ibm.com>,
	Vasily Gorbik <gor@...ux.ibm.com>,
	Alexander Gordeev <agordeev@...ux.ibm.com>,
	Christian Borntraeger <borntraeger@...ux.ibm.com>,
	Sven Schnelle <svens@...ux.ibm.com>,
	Gerald Schaefer <gerald.schaefer@...ux.ibm.com>,
	"David S. Miller" <davem@...emloft.net>,
	Andreas Larsson <andreas@...sler.com>,
	Arnd Bergmann <arnd@...db.de>, Muchun Song <muchun.song@...ux.dev>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Uladzislau Rezki <urezki@...il.com>,
	Christoph Hellwig <hch@...radead.org>,
	David Hildenbrand <david@...hat.com>,
	"Matthew Wilcox (Oracle)" <willy@...radead.org>,
	Mark Rutland <mark.rutland@....com>,
	Anshuman Khandual <anshuman.khandual@....com>,
	Dev Jain <dev.jain@....com>, Kevin Brodsky <kevin.brodsky@....com>,
	Alexandre Ghiti <alexghiti@...osinc.com>,
	linux-arm-kernel@...ts.infradead.org, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 0/4] Fixes for hugetlb and vmalloc on arm64

On Wed, Feb 19, 2025 at 07:10:32PM +0000, Catalin Marinas wrote:
> Will, Ryan,
> 
> On Mon, Feb 17, 2025 at 02:04:13PM +0000, Ryan Roberts wrote:
> > This series contains some fixes for hugetlb on arm64, and is split out from v1
> > of a wider series at [1]. While the last patch is technically targetting core-mm
> > and is not directly related to arm64, I'd like to to go via the arm64 tree so
> > that the wider performance improvement series (v2 to be posted shortly) that
> > depends on this series doesn't have to be robust to the fix not being present.
> > 
> > I've included maintainers/reviewers for all the arches that are (trivially)
> > touched due to the API changes, hoping for some ACKs.
> 
> These fixes look fine to me and I think we should get them in for 6.14.
> I think Andrew was ok with them going in via the arm64 tree:
> 
> https://lore.kernel.org/linux-arm-kernel/20250205235219.3c3a4b968087d1386d708b04@linux-foundation.org/

I think the diffstat looks worse than it really is, as the arch changes
are reasonably mechanical. I'd like to let it sit in next for a few days
though, so I'll pick this up once we've resolved my comment on patch #2.

Ryan -- did you find all of these issues by inspection, or are you aware
of anybody hitting them in practice?

Will