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(unknown []) by gzga-smtp-mtada-g1-3 (Coremail) with SMTP id _____wD3P0wVn2Bpw14kFQ--.6242S2; Fri, 09 Jan 2026 14:24:22 +0800 (CST) From: ranxiaokai627@163.com To: surenb@google.com, vbabka@suse.cz, kent.overstreet@linux.dev, akpm@linux-foundation.org, david@kernel.org, lorenzo.stoakes@oracle.com, Liam.Howlett@oracle.com, rppt@kernel.org, mhocko@suse.com, corbet@lwn.net Cc: linux-mm@kvack.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, ran.xiaokai@zte.com.cn, ranxiaokai627@163.com Subject: [PATCH] alloc_tag: remove sysctl prefix from mem_profiling boot parameter Date: Fri, 9 Jan 2026 06:24:19 +0000 Message-ID: <20260109062419.157284-1-ranxiaokai627@163.com> X-Mailer: git-send-email 2.43.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CM-TRANSID:_____wD3P0wVn2Bpw14kFQ--.6242S2 X-Coremail-Antispam: 1Uf129KBjvJXoW7WF45Cw1kKrWrurWkXryrJFb_yoW8Cr1DpF 4UWr1rGa95AryUCrn5J34IgryxWan7Ka17JanF9FW09wn0yF4ktrW8trWSvF1xXrZ7CF45 Xr4IvFWxXr10ywUanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDUYxBIdaVFxhVjvjDU0xZFpf9x0pin2-UUUUUU= X-Originating-IP: [117.176.243.134] X-CM-SenderInfo: xudq5x5drntxqwsxqiywtou0bp/xtbCxhZfq2lgnxbCJwAA3B X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: C0FF520004 X-Stat-Signature: fxcj973zqd8b7px6guxc4dx3844msory X-Rspam-User: X-HE-Tag: 1767939884-152884 X-HE-Meta: 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 PGPw6yP+ 0eqRsXpAEVJW1ejpFXIPpqL410T/q9v5Il6hVPmIEiwGgtK5cIRUHiZAXCG4w+nClxNr2e18LaxMzCXMcu2SAolLxlTIy5RCP6ctSe+9bxf10B/xu9EzGPzAQYfckBzcnpdaUd5FZn/eOpDvMbk/F5ph6dtyg4eZmWXkn8GETGZCynF4QQ3f00DV343zDRyuZLEtyKNzI4YC/ZQTeVd6xA2QwYc+ZMzjklF3SL0M8lq0P0z2gjRvAmLdGxr+4SWllZ3vLwP6/+ZifRdum9hRJb1aPV2wxKz1EdjVAbUbg4Xl6AExpnsoGG7WGOWvgGot2AdB1xpeu1GHA7RaK/pAetjG9jncbkAG1VDDrJ/uHjb8jQYjjQT8isK4I8Q5sKymqr7vKAPHUcss70cu1TBbhb8XBtw2fGoxJMwqy7aHSo36bOla8mzRfwSU3a7CodJlDir9h 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: List-Subscribe: List-Unsubscribe: From: Ran Xiaokai Boot parameters prefixed with "sysctl." are processed separately during the final stage of system initialization via kernel_init()-> do_sysctl_args(). Since mem_profiling support should be parsed in early boot stage, it is unsuitable for centralized handling in do_sysctl_args(). Also, when CONFIG_MEM_ALLOC_PROFILING_DEBUG is enabled, the sysctl.vm.mem_profiling entry is not writable and will cause a warning. To prevent duplicate processing of sysctl.vm.mem_profiling, rename the boot parameter to "mem_profiling". Signed-off-by: Ran Xiaokai --- Documentation/mm/allocation-profiling.rst | 2 +- lib/alloc_tag.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/Documentation/mm/allocation-profiling.rst b/Documentation/mm/allocation-profiling.rst index 316311240e6a..fe341d6da7b9 100644 --- a/Documentation/mm/allocation-profiling.rst +++ b/Documentation/mm/allocation-profiling.rst @@ -18,7 +18,7 @@ kconfig options: missing annotation Boot parameter: - sysctl.vm.mem_profiling={0|1|never}[,compressed] + mem_profiling={0|1|never}[,compressed] When set to "never", memory allocation profiling overhead is minimized and it cannot be enabled at runtime (sysctl becomes read-only). diff --git a/lib/alloc_tag.c b/lib/alloc_tag.c index 846a5b5b44a4..81b248196629 100644 --- a/lib/alloc_tag.c +++ b/lib/alloc_tag.c @@ -747,7 +747,7 @@ static int __init setup_early_mem_profiling(char *str) return 0; } -early_param("sysctl.vm.mem_profiling", setup_early_mem_profiling); +early_param("mem_profiling", setup_early_mem_profiling); static __init bool need_page_alloc_tagging(void) { -- 2.25.1