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Sun, 07 Jul 2024 18:00:20 -0700 (PDT) From: Wei Yang To: rppt@kernel.org, akpm@linux-foundation.org, brauner@kernel.org, oleg@redhat.com, mjguzik@gmail.com, tandersen@netflix.com Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Wei Yang , David Hildenbrand Subject: [PATCH v4 2/3] kernel/fork.c: get totalram_pages from memblock to calculate max_threads Date: Mon, 8 Jul 2024 01:00:09 +0000 Message-Id: <20240708010010.32347-2-richard.weiyang@gmail.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20240708010010.32347-1-richard.weiyang@gmail.com> References: <20240708010010.32347-1-richard.weiyang@gmail.com> X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: E6125A0005 X-Stat-Signature: ewu4uhyyayxns4ecet65md51hhybxdkc X-Rspam-User: X-HE-Tag: 1720400422-71286 X-HE-Meta: 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 darf2O4S 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 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: Since we plan to move the accounting into __free_pages_core(), totalram_pages may not represent the total usable pages on system at this point when defer_init is enabled. Instead we can get the total estimated pages from memblock directly. Signed-off-by: Wei Yang CC: Mike Rapoport (IBM) CC: David Hildenbrand CC: Oleg Nesterov --- kernel/fork.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/kernel/fork.c b/kernel/fork.c index 99076dbe27d8..e80e889543f3 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -44,6 +44,7 @@ #include #include #include +#include #include #include #include @@ -999,7 +1000,7 @@ void __init __weak arch_task_cache_init(void) { } static void set_max_threads(unsigned int max_threads_suggested) { u64 threads; - unsigned long nr_pages = totalram_pages(); + unsigned long nr_pages = memblock_estimated_nr_pages(); /* * The number of threads shall be limited such that the thread -- 2.34.1