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Updated RLIMIT_MEMLOCK to account for pushing RLIMIT to RLIM_INFINITY #11

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Updated RLIMIT_MEMLOCK to account for pushing RLIMIT to RLIM_INFINITY #11

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6 changes: 2 additions & 4 deletions kernel/Documentation/bpf/troubleshooting.rst
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Expand Up @@ -8,11 +8,9 @@ programs. With a primary focus on programs under kernels samples/bpf.
Memory ulimits
==============

The eBPF maps uses locked memory, which is default very low.
Your program likely need to increase resource limit ``RLIMIT_MEMLOCK``
see system call `setrlimit(2)`_.
The eBPF maps uses locked memory. A typical Ubuntu system will set RLIMIT to 64k `uname -l`.

The ``bpf_create_map`` call will return errno EPERM (Operation not
The ``bpf_create_map`` call will set the RLIMIT_MEMLOCK to RLIM_INFINITY and will return errno EPERM (Operation not
permitted) when the RLIMIT_MEMLOCK memory size limit is exceeded.

.. _setrlimit(2): http://man7.org/linux/man-pages/man2/setrlimit.2.html
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