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[173.79.60.52]) by smtp.gmail.com with ESMTPSA id d75a77b69052e-532eb32f6aasm45064551cf.16.2026.09.24.09.38.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 24 Sep 2026 09:38:10 -0700 (PDT) Date: Thu, 24 Sep 2026 12:38:08 -0400 From: Gregory Price To: "Lorenzo Stoakes (ARM)" Cc: Andrew Morton , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-usb@vger.kernel.org, linux-rdma@vger.kernel.org, selinux@vger.kernel.org, linux-sound@vger.kernel.org, bpf@vger.kernel.org, linux-scsi@vger.kernel.org, linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-trace-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, linux-arch@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, sparclinux@vger.kernel.org, fuse-devel@lists.linux.dev Subject: Re: [PATCH v3 03/40] mm/vma: introduce and use vma_[flags_]can_merge() Message-ID: References: <20260917-b4-mmap-prepare-vma-flag-sanify-v3-0-4583d8a23bca@kernel.org> <20260917-b4-mmap-prepare-vma-flag-sanify-v3-3-4583d8a23bca@kernel.org> Precedence: bulk X-Mailing-List: linux-fbdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260917-b4-mmap-prepare-vma-flag-sanify-v3-3-4583d8a23bca@kernel.org> On Thu, Sep 17, 2026 at 05:22:12PM +0100, Lorenzo Stoakes (ARM) wrote: > Replace the open-coded VMA_SPECIAL_FLAGS check in the VMA merge logic with > two new functions vma_flags_can_merge() and vma_can_merge() and update the > merge logic to use the former. > > This abstracts the check and expresses it in terms of the desired behaviour > rather than an arbitrary and confusing VMA flag. > > This also lays the groundwork for making further improvements in VMA flag > usage. > > Also update the userland VMA tests to reflect the change. > > No functional change intended. > > Signed-off-by: Lorenzo Stoakes (ARM) Reviewed-by: Gregory Price (Meta) From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 60872C98318 for ; 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[173.79.60.52]) by smtp.gmail.com with ESMTPSA id d75a77b69052e-532eb32f6aasm45064551cf.16.2026.09.24.09.38.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 24 Sep 2026 09:38:10 -0700 (PDT) Date: Thu, 24 Sep 2026 12:38:08 -0400 From: Gregory Price To: "Lorenzo Stoakes (ARM)" Cc: Andrew Morton , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-usb@vger.kernel.org, linux-rdma@vger.kernel.org, selinux@vger.kernel.org, linux-sound@vger.kernel.org, bpf@vger.kernel.org, linux-scsi@vger.kernel.org, linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-trace-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, linux-arch@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, sparclinux@vger.kernel.org, fuse-devel@lists.linux.dev Subject: Re: [PATCH v3 03/40] mm/vma: introduce and use vma_[flags_]can_merge() Message-ID: References: <20260917-b4-mmap-prepare-vma-flag-sanify-v3-0-4583d8a23bca@kernel.org> <20260917-b4-mmap-prepare-vma-flag-sanify-v3-3-4583d8a23bca@kernel.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20260917-b4-mmap-prepare-vma-flag-sanify-v3-3-4583d8a23bca@kernel.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260924_093812_739147_1EE656AD X-CRM114-Status: GOOD ( 10.49 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org On Thu, Sep 17, 2026 at 05:22:12PM +0100, Lorenzo Stoakes (ARM) wrote: > Replace the open-coded VMA_SPECIAL_FLAGS check in the VMA merge logic with > two new functions vma_flags_can_merge() and vma_can_merge() and update the > merge logic to use the former. > > This abstracts the check and expresses it in terms of the desired behaviour > rather than an arbitrary and confusing VMA flag. > > This also lays the groundwork for making further improvements in VMA flag > usage. > > Also update the userland VMA tests to reflect the change. > > No functional change intended. > > Signed-off-by: Lorenzo Stoakes (ARM) Reviewed-by: Gregory Price (Meta) _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C7000C98321 for ; 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[173.79.60.52]) by smtp.gmail.com with ESMTPSA id d75a77b69052e-532eb32f6aasm45064551cf.16.2026.09.24.09.38.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 24 Sep 2026 09:38:10 -0700 (PDT) Date: Thu, 24 Sep 2026 12:38:08 -0400 From: Gregory Price To: "Lorenzo Stoakes (ARM)" Cc: Andrew Morton , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-usb@vger.kernel.org, linux-rdma@vger.kernel.org, selinux@vger.kernel.org, linux-sound@vger.kernel.org, bpf@vger.kernel.org, linux-scsi@vger.kernel.org, linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-trace-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, linux-arch@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, sparclinux@vger.kernel.org, fuse-devel@lists.linux.dev Subject: Re: [PATCH v3 03/40] mm/vma: introduce and use vma_[flags_]can_merge() Message-ID: References: <20260917-b4-mmap-prepare-vma-flag-sanify-v3-0-4583d8a23bca@kernel.org> <20260917-b4-mmap-prepare-vma-flag-sanify-v3-3-4583d8a23bca@kernel.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20260917-b4-mmap-prepare-vma-flag-sanify-v3-3-4583d8a23bca@kernel.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260924_093812_713043_8AFDE008 X-CRM114-Status: GOOD ( 10.49 ) X-BeenThere: kvm-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "kvm-riscv" Errors-To: kvm-riscv-bounces+kvm-riscv=archiver.kernel.org@lists.infradead.org On Thu, Sep 17, 2026 at 05:22:12PM +0100, Lorenzo Stoakes (ARM) wrote: > Replace the open-coded VMA_SPECIAL_FLAGS check in the VMA merge logic with > two new functions vma_flags_can_merge() and vma_can_merge() and update the > merge logic to use the former. > > This abstracts the check and expresses it in terms of the desired behaviour > rather than an arbitrary and confusing VMA flag. > > This also lays the groundwork for making further improvements in VMA flag > usage. > > Also update the userland VMA tests to reflect the change. > > No functional change intended. > > Signed-off-by: Lorenzo Stoakes (ARM) Reviewed-by: Gregory Price (Meta) -- kvm-riscv mailing list kvm-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kvm-riscv