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Wed, 03 Sep 2025 04:16:17 -0700 (PDT) Received: from localhost ([2a03:2880:31ff:6::]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3db72983560sm4717559f8f.1.2025.09.03.04.16.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 03 Sep 2025 04:16:16 -0700 (PDT) From: Yueyang Pan To: Suren Baghdasaryan , Andrew Morton , Vlastimil Babka , Michal Hocko , Brendan Jackman , Johannes Weiner , Zi Yan , Vishal Moola , Shakeel Butt , Usama Arif Cc: linux-mm@kvack.org, kernel-team@meta.com, linux-kernel@vger.kernel.org Subject: [PATCH v3 1/2] mm/show_mem: Dump the status of the mem alloc profiling before printing Date: Wed, 3 Sep 2025 04:16:13 -0700 Message-ID: X-Mailer: git-send-email 2.47.3 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: CF3B91A0006 X-Stat-Signature: 793z5o1go54woi1nmqdjte7c9g1wwxqg X-Rspam-User: X-HE-Tag: 1756898178-209054 X-HE-Meta: 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 m/NZb5+g 7k+lsXIE3hJMiq8wLE70ER3VtH8MOpMdpfXqkikc0vCVbKHptUHXv6YK0gDaFfkuAaqMZcCOJcYkDNhMEX2+1H9WpxWyh9U1xplrDNAImkWsHSe7DRk0Mscp7eIAwXmxyYmqisaUcPDrxtxso9RL+fxueb2Qe6KkpHOfj7zH0zgj9m58I0ZYhbPARAWgrqe0geg2yPd80C7ldP3OLmq71VeU9mWyW0bfAzDHjnutqGZfvSio1+Wdr50AU3k/tieoYOh7C3i8nK6RvtyAfz35jB/+v1WM4unsRZgNRKMabE5DvvMBaXgUH+qqws9S1MEOzuqJSQ+Hf4zMgy7Kz26ahVt3taYONHeqCL1a46Q37pRlrsFpxtTP+psHd8B3Qp5EaKqlSNqIpOctJGJqVlIbu4Bye8PawPD3sFyx+ytAz2N3GggzDtM2a+KGlDs7J/ualpVVWtMzjafZQQs8Mv/PooSBdAE5jLjuM7/zvxGf5EXh+gsXc9okDwnhcB2sHM73Rbqx1rXzz8shgu5A4xxzD4MX94ZU1ZN+BVxtZQ9nsmvf3998MFSFVWj1NlzQ0z4HE12/0DHTMP7Vl/6S0p6cUShe/ubahcsIouWQmWl+y+yayqqqNZiqT9hizQg== 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: This patch prints the status of the memory allocation profiling before __show_mem actually prints the detailed allocation info. This way will let us know the `0B` we saw in allocation info is because the profiling is disabled or the allocation is actually 0B. Signed-off-by: Yueyang Pan --- mm/show_mem.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/mm/show_mem.c b/mm/show_mem.c index ecf20a93ea54..fd85a028a926 100644 --- a/mm/show_mem.c +++ b/mm/show_mem.c @@ -427,7 +427,8 @@ void __show_mem(unsigned int filter, nodemask_t *nodemask, int max_zone_idx) nr = alloc_tag_top_users(tags, ARRAY_SIZE(tags), false); if (nr) { - pr_notice("Memory allocations:\n"); + pr_notice("Memory allocations (profiling is currently turned %s):\n", + mem_alloc_profiling_enabled() ? "on" : "off"); for (i = 0; i < nr; i++) { struct codetag *ct = tags[i].ct; struct alloc_tag *tag = ct_to_alloc_tag(ct); -- 2.47.3