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-rw-r--r--doc/guides/linux_gsg/sys_reqs.rst9
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diff --git a/doc/guides/linux_gsg/sys_reqs.rst b/doc/guides/linux_gsg/sys_reqs.rst
index 29c5f47a..1c6f86a2 100644
--- a/doc/guides/linux_gsg/sys_reqs.rst
+++ b/doc/guides/linux_gsg/sys_reqs.rst
@@ -70,6 +70,15 @@ Compilation of the DPDK
* libnuma-dev in Debian/Ubuntu;
+ .. note::
+
+ On systems with NUMA support, `libnuma-dev` (aka `numactl-devel`)
+ is a recommended dependency when `--legacy-mem` switch is used,
+ and a *required* dependency if default memory mode is used.
+ While DPDK will compile and run without `libnuma`
+ even on NUMA-enabled systems,
+ both usability and performance will be degraded.
+
* Python, version 2.7+ or 3.2+, to use various helper scripts included in the DPDK package.