diff options
| author |   Michal Hocko <mhocko@suse.com> | 2017-07-06 15:41:02 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2017-07-06 16:24:35 -0700 |
| commit | f70029bbaacbfa8f082d2b4988717cba4e269f17 (patch) | |
| tree | da4860c5227a317637194b6ca9ee4c6becfddb53 /Documentation/admin-guide | |
| parent | mm, memory_hotplug: drop artificial restriction on online/offline (diff) | |
| download | linux-dev-f70029bbaacbfa8f082d2b4988717cba4e269f17.tar.xz linux-dev-f70029bbaacbfa8f082d2b4988717cba4e269f17.zip | |
mm, memory_hotplug: drop CONFIG_MOVABLE_NODE
Commit 20b2f52b73fe ("numa: add CONFIG_MOVABLE_NODE for
movable-dedicated node") has introduced CONFIG_MOVABLE_NODE without a
good explanation on why it is actually useful.
It makes a lot of sense to make movable node semantic opt in but we
already have that because the feature has to be explicitly enabled on
the kernel command line. A config option on top only makes the
configuration space larger without a good reason. It also adds an
additional ifdefery that pollutes the code.
Just drop the config option and make it de-facto always enabled. This
shouldn't introduce any change to the semantic.
Link: http://lkml.kernel.org/r/20170529114141.536-3-mhocko@kernel.org
Signed-off-by: Michal Hocko <mhocko@suse.com>
Acked-by: Reza Arbab <arbab@linux.vnet.ibm.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: Yasuaki Ishimatsu <yasu.isimatu@gmail.com>
Cc: Xishi Qiu <qiuxishi@huawei.com>
Cc: Kani Toshimitsu <toshi.kani@hpe.com>
Cc: Chen Yucong <slaoub@gmail.com>
Cc: Joonsoo Kim <js1304@gmail.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Daniel Kiper <daniel.kiper@oracle.com>
Cc: Igor Mammedov <imammedo@redhat.com>
Cc: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation/admin-guide')
| -rw-r--r-- | Documentation/admin-guide/kernel-parameters.txt | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 34ae9663aefd..dd7abbea8188 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -2303,8 +2303,11 @@ that the amount of memory usable for all allocations is not too small. - movable_node [KNL] Boot-time switch to enable the effects - of CONFIG_MOVABLE_NODE=y. See mm/Kconfig for details. + movable_node [KNL] Boot-time switch to make hotplugable memory + NUMA nodes to be movable. This means that the memory + of such nodes will be usable only for movable + allocations which rules out almost all kernel + allocations. Use with caution! MTD_Partition= [MTD] Format: <name>,<region-number>,<size>,<offset> |