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Message-ID: <CALDQ5Nwfz6z_BxCJnMdTP76M0Y3b9+aSXNjZ04MZisEwSTB-cg@mail.gmail.com> Date: Tue, 21 Feb 2023 18:34:55 +0000 From: James Addison <jay@...hosting.net> To: linux-kernel@...r.kernel.org Subject: [PATCH] Documentation: update kernel parameter limit notes There does appear to be a limit on the number of parameters accepted by the kernel at boot-time, so this changeset updates the kernel-parameters.rst documentation to reflect that. Signed-off-by: James Addison <jay@...hosting.net> --- Documentation/admin-guide/kernel-parameters.rst | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/Documentation/admin-guide/kernel-parameters.rst b/Documentation/admin-guide/kernel-parameters.rst index 959f73a32..12cbf46b6 100644 --- a/Documentation/admin-guide/kernel-parameters.rst +++ b/Documentation/admin-guide/kernel-parameters.rst @@ -204,7 +204,8 @@ be entered as an environment variable, whereas its absence indicates that it will appear as a kernel argument readable via /proc/cmdline by programs running once the system is up. -The number of kernel parameters is not limited, but the length of the +The number of kernel parameters is limited to 32 by default (128 in User Mode +Linux), and is defined in ./init/main.c as MAX_INIT_ARGS. The length of the complete command line (parameters including spaces etc.) is limited to a fixed number of characters. This limit depends on the architecture and is between 256 and 4096 characters. It is defined in the file -- 2.39.1
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