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[209.85.167.46]) by smtp.gmail.com with ESMTPSA id l5-20020a19c205000000b004f3a71a9e72sm238560lfc.102.2023.05.18.11.05.03 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 18 May 2023 11:05:03 -0700 (PDT) Received: by mail-lf1-f46.google.com with SMTP id 2adb3069b0e04-4f3a7241c0aso966729e87.1 for ; Thu, 18 May 2023 11:05:03 -0700 (PDT) X-Received: by 2002:a17:907:928b:b0:966:2123:e0c3 with SMTP id bw11-20020a170907928b00b009662123e0c3mr39319767ejc.15.1684432601629; Thu, 18 May 2023 10:56:41 -0700 (PDT) MIME-Version: 1.0 References: <20230518173403.1150549-1-catalin.marinas@arm.com> In-Reply-To: <20230518173403.1150549-1-catalin.marinas@arm.com> From: Linus Torvalds Date: Thu, 18 May 2023 10:56:24 -0700 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH v4 00/15] mm, dma, arm64: Reduce ARCH_KMALLOC_MINALIGN to 8 To: Catalin Marinas Cc: Arnd Bergmann , Christoph Hellwig , Greg Kroah-Hartman , Will Deacon , Marc Zyngier , Andrew Morton , Herbert Xu , Ard Biesheuvel , Isaac Manjarres , Saravana Kannan , Alasdair Kergon , Daniel Vetter , Joerg Roedel , Mark Brown , Mike Snitzer , "Rafael J. Wysocki" , Robin Murphy , linux-mm@kvack.org, iommu@lists.linux.dev, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Rspamd-Queue-Id: E97204000F X-Rspam-User: X-Rspamd-Server: rspam04 X-Stat-Signature: ux851n59tm5747wewuxbdmafc45jhbxj X-HE-Tag: 1684433105-250761 X-HE-Meta: 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 Cusxmbz6 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Thu, May 18, 2023 at 10:34=E2=80=AFAM Catalin Marinas wrote: > > That's the fourth version of the series reducing the kmalloc() minimum > alignment on arm64 to 8 (from 128). Lovely. On my M2 Macbook air, I right now have about 24MB in the kmalloc-128 bucket, and most of it is presumably just 16 byte allocations (judging by my x86-64 slabinfo). I guess it doesn't really matter when I have 16GB in the machine, but this has annoyed me for a while. It feels like this is ready for 6.5, no? Linus