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Fri, 6 Nov 2026 16:57:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793984248; bh=0GkE8hZIJYtd3UHUB9YTMTqSfhEImKLinoLGGzd5XkM=; h=Date:From:To:Cc:Subject:In-Reply-To:References; b=NCdGM8rwN5bCNZ6rWdVxDrw9mInGo/n3xAuqFE5kst2Q9pV8Pxq6AgwKmPDqem4XK KlTApBAXNvPKpIuk7Dp0jcuGjSnQYAut++TKz/rGLVu22G1U9HHPqSFhMABL5fX3v6 ubrOEiJCCT5mDGt2a+HCJjnGll4dB+Dj+trUGB8ybQyiaWYiRGDErq8yTWcKfQ51wa CjwhWQBNkXc2V4aWq8WXZO34/HGawc+tqMuSSEmq+oVCMK8/xnEbRIMU6etL+6a81L LKKDTjL6RKDIVBLjZ7H+irbg+1mndAq+FQiGkxz7CFp/VxVAXr1cKcKs6+mIJj7qIo qF585rUxNhVRQ== Received: from sofa.misterjones.org ([185.219.108.64] helo=goblin-girl.misterjones.org) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.98.2) (envelope-from ) id 1xPNFm-0000000CHU4-09ZA; Fri, 06 Nov 2026 16:57:26 +0000 Date: Fri, 06 Nov 2026 16:57:25 +0000 Message-ID: <86y0b528zu.wl-maz@kernel.org> From: Marc Zyngier To: Leonardo Bras Cc: Oliver Upton , Fuad Tabba , Joey Gouly , Steffen Eiden , Suzuki K Poulose , Zenghui Yu , Catalin Marinas , Will Deacon , Mark Rutland , Raghavendra Rao Ananta , linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linux-kernel@vger.kernel.org Subject: Re: [PATCH RESEND v4 0/3] Optimize S2 hugepage splitting, introduce skip-level flags In-Reply-To: <20261106161240.1345126-1-leo.bras@arm.com> References: <20261106161240.1345126-1-leo.bras@arm.com> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM-LB/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL-LB/10.8 EasyPG/1.0.0 Emacs/30.1 (aarch64-unknown-linux-gnu) MULE/6.0 (HANACHIRUSATO) X-Archived-By: MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: leo.bras@arm.com, oupton@kernel.org, fuad.tabba@linux.dev, joey.gouly@arm.com, seiden@linux.ibm.com, suzuki.poulose@arm.com, yuzenghui@huawei.com, catalin.marinas@arm.com, will@kernel.org, mark.rutland@arm.com, rananta@google.com, linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linux-kernel@vger.kernel.org X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" X-Spam-Status: No, score=-5.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=no autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 On Fri, 06 Nov 2026 16:12:35 +0000, Leonardo Bras wrote: > > > While playing with dirty-bit tracking, I decided to take a look on how page > splitting works. Found out all entries are walked, even though we don't need > to walk the level-3 entries, as they don't need to be split. What's the point of this "RESEND"? Anything different from what you sent on Sept 30th? Since it is still numbered v4, I assume nothing has changed... M. -- Without deviation from the norm, progress is not possible.