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authorMuchun Song <songmuchun@bytedance.com>2022-06-28 12:22:30 +0300
committerAndrew Morton <akpm@linux-foundation.org>2022-08-09 04:06:42 +0300
commitdff033818a06e7d0bf79271e34bda11c2d9d98d0 (patch)
treec4eaf7a87d3f4b6a9fe321e315482139732c16b4 /fs/Kconfig
parentcf5472e561133888df81d2e48f7da9ebd3299459 (diff)
downloadlinux-dff033818a06e7d0bf79271e34bda11c2d9d98d0.tar.xz
mm: hugetlb_vmemmap: introduce the name HVO
It it inconvenient to mention the feature of optimizing vmemmap pages associated with HugeTLB pages when communicating with others since there is no specific or abbreviated name for it when it is first introduced. Let us give it a name HVO (HugeTLB Vmemmap Optimization) from now. This commit also updates the document about "hugetlb_free_vmemmap" by the way discussed in thread [1]. Link: https://lore.kernel.org/all/21aae898-d54d-cc4b-a11f-1bb7fddcfffa@redhat.com/ [1] Link: https://lkml.kernel.org/r/20220628092235.91270-4-songmuchun@bytedance.com Signed-off-by: Muchun Song <songmuchun@bytedance.com> Reviewed-by: Oscar Salvador <osalvador@suse.de> Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com> Cc: Anshuman Khandual <anshuman.khandual@arm.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: David Hildenbrand <david@redhat.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Will Deacon <will@kernel.org> Cc: Xiongchun Duan <duanxiongchun@bytedance.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'fs/Kconfig')
-rw-r--r--fs/Kconfig12
1 files changed, 5 insertions, 7 deletions
diff --git a/fs/Kconfig b/fs/Kconfig
index 5976eb33535f..a547307c1ae8 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -247,8 +247,7 @@ config HUGETLB_PAGE
#
# Select this config option from the architecture Kconfig, if it is preferred
-# to enable the feature of minimizing overhead of struct page associated with
-# each HugeTLB page.
+# to enable the feature of HugeTLB Vmemmap Optimization (HVO).
#
config ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP
bool
@@ -259,14 +258,13 @@ config HUGETLB_PAGE_OPTIMIZE_VMEMMAP
depends on SPARSEMEM_VMEMMAP
config HUGETLB_PAGE_OPTIMIZE_VMEMMAP_DEFAULT_ON
- bool "Default optimizing vmemmap pages of HugeTLB to on"
+ bool "HugeTLB Vmemmap Optimization (HVO) defaults to on"
default n
depends on HUGETLB_PAGE_OPTIMIZE_VMEMMAP
help
- When using HUGETLB_PAGE_OPTIMIZE_VMEMMAP, the optimizing unused vmemmap
- pages associated with each HugeTLB page is default off. Say Y here
- to enable optimizing vmemmap pages of HugeTLB by default. It can then
- be disabled on the command line via hugetlb_free_vmemmap=off.
+ The HugeTLB VmemmapvOptimization (HVO) defaults to off. Say Y here to
+ enable HVO by default. It can be disabled via hugetlb_free_vmemmap=off
+ (boot command line) or hugetlb_optimize_vmemmap (sysctl).
config MEMFD_CREATE
def_bool TMPFS || HUGETLBFS