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[66.187.233.206]) by smtp.gmail.com with ESMTPSA id v187-v6sm1649374qka.73.2018.09.27.13.34.09 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 27 Sep 2018 13:34:10 -0700 (PDT) From: Masayoshi Mizuma To: Thomas Gleixner , Ingo Molnar , Borislav Petkov , "H. Peter Anvin" , x86@kernel.org, Baoquan He Cc: Masayoshi Mizuma , Masayoshi Mizuma , linux-kernel@vger.kernel.org Subject: [PATCH v4 3/3] docs: kernel-parameters.txt: document rand_mem_physical_padding parameter Date: Thu, 27 Sep 2018 16:31:46 -0400 Message-Id: <20180927203146.12201-4-msys.mizuma@gmail.com> X-Mailer: git-send-email 2.19.0 In-Reply-To: <20180927203146.12201-1-msys.mizuma@gmail.com> References: <20180927203146.12201-1-msys.mizuma@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Masayoshi Mizuma This kernel parameter allows to change the padding used for the physical memory mapping section when KASLR memory is enabled. For memory hotplug capable systems, the default padding size, CONFIG_RANDOMIZE_MEMORY_PHYSICAL_PADDING, may not be enough. The option is useful to adjust the padding size. Signed-off-by: Masayoshi Mizuma --- Documentation/admin-guide/kernel-parameters.txt | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 92eb1f4..de43cdf 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -3529,6 +3529,13 @@ fully seed the kernel's CRNG. Default is controlled by CONFIG_RANDOM_TRUST_CPU. + rand_mem_physical_padding= + [KNL] Define the padding size in terabytes + used for the physical memory mapping section + when KASLR memory is enabled. + The default value is + CONFIG_RANDOMIZE_MEMORY_PHYSICAL_PADDING. + ras=option[,option,...] [KNL] RAS-specific options cec_disable [X86] -- 2.18.0