From: Bruce Richardson <bruce.richardson@intel.com>
To: john.mcnamara@intel.com
Cc: dev@dpdk.org, Bruce Richardson <bruce.richardson@intel.com>
Subject: [dpdk-dev] [PATCH 1/3] doc: clarify documentation on running as non-root
Date: Fri, 4 Aug 2017 13:44:09 +0100 [thread overview]
Message-ID: <20170804124411.238646-2-bruce.richardson@intel.com> (raw)
In-Reply-To: <20170804124411.238646-1-bruce.richardson@intel.com>
Since modern kernels don't allow unprivileged processes to read the
pagemaps file, the instructions on running as non-root are out-of-date. Add
a note clarifying that they will only work with earlier kernel versions.
Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
doc/guides/linux_gsg/enable_func.rst | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/doc/guides/linux_gsg/enable_func.rst b/doc/guides/linux_gsg/enable_func.rst
index e6c806b0d..5ac0184a1 100644
--- a/doc/guides/linux_gsg/enable_func.rst
+++ b/doc/guides/linux_gsg/enable_func.rst
@@ -87,6 +87,14 @@ The application can then determine what action to take, if any, if the HPET is n
Running DPDK Applications Without Root Privileges
--------------------------------------------------------
+.. note::
+
+ The instructions below will allow running DPDK as non-root with older
+ Linux kernel versions. However, since version 4.0, the kernel does not allow
+ unprivileged processes to read the physical address information from
+ the pagemaps file, making it impossible for those processes to use HW
+ devices which require physical addresses
+
Although applications using the DPDK use network ports and other hardware resources directly,
with a number of small permission adjustments it is possible to run these applications as a user other than "root".
To do so, the ownership, or permissions, on the following Linux file system objects should be adjusted to ensure that
--
2.13.3
next prev parent reply other threads:[~2017-08-04 13:32 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-04 12:44 [dpdk-dev] [PATCH 0/3] small documentation updates Bruce Richardson
2017-08-04 12:44 ` Bruce Richardson [this message]
2017-08-04 13:39 ` [dpdk-dev] [PATCH 1/3] doc: clarify documentation on running as non-root Mcnamara, John
2017-08-04 12:44 ` [dpdk-dev] [PATCH 2/3] doc: remove unneeded TLB from title of FAQ question 2 Bruce Richardson
2017-08-04 13:40 ` Mcnamara, John
2017-08-04 13:41 ` Mcnamara, John
2017-08-04 12:44 ` [dpdk-dev] [PATCH 3/3] doc: update FAQ with new testpmd default burst size Bruce Richardson
2017-08-04 13:42 ` Mcnamara, John
2017-08-06 10:25 ` Thomas Monjalon
2017-08-06 10:25 ` [dpdk-dev] [PATCH 0/3] small documentation updates Thomas Monjalon
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