If we add ``thp_anon=32,64K:always`` to the kernel command line, we
will see the following error:
[ 0.000000] huge_memory: thp_anon=32,64K:always: error parsing string,
ignoring setting
This happens because the correct format isn't
``thp_anon=<size>,<size>[KMG]:<state>```,
as [KMG] must follow each number to especify its unit. So, the correct
format is ``thp_anon=<size>[KMG],<size>[KMG]:<state>```.
Therefore, adjust the documentation to reflect the correct format of the
parameter ``thp_anon=``.
Fixes: dd4d30d1cdbe ("mm: override mTHP "enabled" defaults at kernel cmdline")
Signed-off-by: Maíra Canal <mca...@igalia.com>
Acked-by: Barry Song <bao...@kernel.org>
Acked-by: David Hildenbrand <da...@redhat.com>
---
Documentation/admin-guide/kernel-parameters.txt | 2 +-
Documentation/admin-guide/mm/transhuge.rst | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/Documentation/admin-guide/kernel-parameters.txt
b/Documentation/admin-guide/kernel-parameters.txt
index 1518343bbe22..1666576acc0e 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -6688,7 +6688,7 @@
0: no polling (default)
thp_anon= [KNL]
- Format:
<size>,<size>[KMG]:<state>;<size>-<size>[KMG]:<state>
+ Format:
<size>[KMG],<size>[KMG]:<state>;<size>[KMG]-<size>[KMG]:<state>
state is one of "always", "madvise", "never" or
"inherit".
Control the default behavior of the system with respect
to anonymous transparent hugepages.
diff --git a/Documentation/admin-guide/mm/transhuge.rst
b/Documentation/admin-guide/mm/transhuge.rst
index 5caa3fb2feb1..abdf10a1c7db 100644
--- a/Documentation/admin-guide/mm/transhuge.rst
+++ b/Documentation/admin-guide/mm/transhuge.rst
@@ -303,7 +303,7 @@ control by passing the parameter
``transparent_hugepage=always`` or
kernel command line.
Alternatively, each supported anonymous THP size can be controlled by
-passing ``thp_anon=<size>,<size>[KMG]:<state>;<size>-<size>[KMG]:<state>``,
+passing
``thp_anon=<size>[KMG],<size>[KMG]:<state>;<size>[KMG]-<size>[KMG]:<state>``,
where ``<size>`` is the THP size (must be a power of 2 of PAGE_SIZE and
supported anonymous THP) and ``<state>`` is one of ``always``, ``madvise``,
``never`` or ``inherit``.
--
2.46.2
