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b=r9NBPScs6Bgut0cVCO8J8KNGE1xN7aUjgNOOwtGPRzSyDtNT5Y1gtD5dLIq8BI/ka a9eyaXwXcD2ryQQOXG4ugp6yrq0bxMZ89V0us/gaYyz4GI7O/3etOobEHBNirG/beZ HHT1dj+cvcoC1dw2J5e0mD1NRjF10g4ezqdR/TZI= Date: Wed, 25 Sep 2024 06:15:36 -0700 From: Andrew Morton To: =?UTF-8?B?6auY57+U?= Cc: Xiang Gao , "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" Subject: Re: =?UTF-8?B?562U5aSNOg==?= [External Mail]Re: [PATCH] mm/cma.c: To better understand cma area during debugging, add total and used count logs to in cma_alloc Message-Id: <20240925061536.e8abdbac3217d85f6f99afd5@linux-foundation.org> In-Reply-To: References: <20240918124325.109236-1-gxxa03070307@gmail.com> <20240924172719.a486793abd66643d9938081f@linux-foundation.org> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 818B41C0024 X-Rspam-User: X-Rspamd-Server: rspam05 X-Stat-Signature: hpd7q1ww5fu4d1dobp7qefgwwo34pzho X-HE-Tag: 1727270138-518324 X-HE-Meta: U2FsdGVkX19RLS8FNOqLacifTGlyJnqpggOUEWWHp5BRDPqav90nDAoQ+iLefDY/9JtwNJQha5hGZCUUGiAWA54VwRJgnXUM0ytYG0BDODdqo5NVe/+RDtxLkJlELHVq0TvX9sZM/uuC1WRDSL9l2Sg+NsyIT/y0xf3ja6FjTsvrKOSzPD48khkWoRl7hVrEH7X/IU6idifV7hyln6MnoRRj6hgr+yhKZNBU5oKuIvZ/rJsd5JzifCnx7b2IhmufDka02ur8QYEhj9gXMv8xd9OGsZrOuOOw4NENIe+39wh6tSbhUvGYKO2V8sY1++8uNQPjl7fRA2qaZDkVQJrceLsoSp2ANOdtn/437wxxV1HvzGzuvLUAqJuTLmIRolJF+jTfRIbj85K2PkDKUbyZUzvGI9ym5ne4eVKbvmyq/n+qJNdprmwYBVWK/htqBTuSwJw4Jq2dGPqPkZLNOxl3GAtO5TT3kQY9KHCZWkeMQgd9cyd865kDwaw+BYrX5hCrjcpSI36irHgjSvtzyFQ35gK4heqsYDXxV6jn4IgM0N3/3tNHc0bKKi1GQaVIaI9fMbf1yJN35nqpib4aJwN0FqKJikTKARvw+o3pSjA1iU80oDXV/TNnB7cbaZgC1s+YcxHOXhQarB9LvjzHgTElJqSXfqIdwNYx43Pw8itkYuP5bKlBoqbPmIcG+dZUMo9Iy3wbTzrEJBDuNDaV83/630BY4XYOLzAFhggiRkUzU1vDoUgQta5Fo3ZwtpDhqG7QHnFlbunJmUjGnE/kuhrb/Sl3i9eR8GjuVQ2St2KSY89wfE+eSunpkB3jH4/5NAtsuZkhAs1yBRvQI+hZiio+qcQ75euBtFpgCcQFGhl9gpzbt1yAEFGmfZUbL0P/tmiU5OTTU0zV71cxKN4SlKoeFPLbwAJgEXUTX9hNEP15JsSFPCdQOpcanoPchD3XgC2a8lk3LosZYIF6jKlEAMb NPJF3ddk jobFTM1aAz0oKZo+m2Yl2EmighBDtUdKJt1uvxqdKVWpMP62DNPne3eF9UN7M2/eh93BXQaRFP3PelvA+cRMNIK5XBn5tgZ+RsDl5We0UzHXsUyUXm/+vChJbQYt4PsCww0lchf+ukFk2x16YH+G/QqMfC4vTEJ3h5c1GnMasWyc5AnKLClF/bBYb2sEm44s/1FMSnGn/Lyflq1K4TZJuAjD1ApxuMQKFhu87YaaljqzM7UiplO3TbKPgfrZF0NQrPL0w7QQ5lBrxz1zLndB4s60kM3ObXm0PJpOsxxTDza9YEbUC/pnFJAfgpVIx8p4aAVDRcM4xJRSkMemD8fSXMtM2qlTTTG9z+INPDEz3Cn5Cs8vq6JCNQBoeIT7IyD+xRv+29i7twDh9LswBsViTt4apovfHiDeZqaGLXP5vqENZsRR+seRO6O95BQ== 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: On Wed, 25 Sep 2024 12:00:56 +0000 高翔 wrote: > > [ 24.225125] cma: cma_alloc(cma (____ptrval____), name: reserved, total count 16384, used count: 64, request count 1, align 0) > > [ 24.231963] cma: cma_alloc(cma (____ptrval____), name: reserved, total count 16384, used count: 65, request count 1, align 0) > > [ 24.235712] cma: cma_alloc(cma (____ptrval____), name: reserved, total count 16384, used count: 66, request count 1, align 0) > > > > > Above is the cma alloc during boot. The before-and-after context has nothing to do with cma alloc. Below is the log with before-and-after context added. > > > [ 24.006605] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled > [ 24.071644] Serial: AMBA driver > [ 24.096063] arm-smmu-v3 9050000.smmuv3: ias 44-bit, oas 44-bit (features 0x00000305) > [ 24.097989] cma: cma_alloc(cma (____ptrval____), name: reserved, total count 16384, used count: 64, request count 1, align 0) > [ 24.104260] cma: cma_alloc(cma (____ptrval____), name: reserved, total count 16384, used count: 65, request count 1, align 0) > [ 24.107504] cma: cma_alloc(cma (____ptrval____), name: reserved, total count 16384, used count: 66, request count 1, align 0) > [ 24.140495] cacheinfo: Unable to detect cache hierarchy for CPU 0 > [ 24.484998] loop: module loaded > [ 24.536152] virtio_blk virtio0: [vda] 4194304 512-byte logical blocks (2.15 GB/2.00 GiB) What I mean is to paste the messages before the patch and to paste the messages after the patch. So readers can easily see what changed.