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Tue, 22 Jul 2025 12:39:42 -0700 (PDT) Received: from pc636 ([2001:9b1:d5a0:a500::800]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-55a4eb36cf9sm139815e87.222.2025.07.22.12.39.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 22 Jul 2025 12:39:41 -0700 (PDT) From: Uladzislau Rezki X-Google-Original-From: Uladzislau Rezki Date: Tue, 22 Jul 2025 21:39:39 +0200 To: Jia He Cc: Catalin Marinas , Will Deacon , Andrew Morton , Uladzislau Rezki , Anshuman Khandual , Ryan Roberts , Peter Xu , Joey Gouly , Yicong Yang , "Matthew Wilcox (Oracle)" , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH] mm: vmalloc: use VMALLOC_EARLY_START boundary for early vmap area Message-ID: References: <20250722040850.2017769-1-justin.he@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250722040850.2017769-1-justin.he@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250722_123944_843144_47F172AF X-CRM114-Status: GOOD ( 10.94 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Tue, Jul 22, 2025 at 04:08:50AM +0000, Jia He wrote: > When VMALLOC_START is redefined to a new boundary, most subsystems > continue to function correctly. However, vm_area_register_early() > assumes the use of the global _vmlist_ structure before vmalloc_init() > is invoked. This assumption can lead to issues during early boot. > But we just should not redefine the macro. If there are such places those are should be fixed, IMO. -- Uladzislau Rezki