mm: hugetlb_vmemmap: cleanup CONFIG_HUGETLB_PAGE_FREE_VMEMMAP*

The word of "free" is not expressive enough to express the feature of
optimizing vmemmap pages associated with each HugeTLB, rename this keywork
to "optimize".  In this patch , cheanup configs to make code more
expressive.

Link: https://lkml.kernel.org/r/20220404074652.68024-4-songmuchun@bytedance.com
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 3f1cc5e317ed4a5ad001082c9c589b6008f68db9..d9b577db6e19f55795ccc2411f8274eda6a7df9d 100644 (file)
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -1660,7 +1660,7 @@
                        Format: size[KMG]
 
        hugetlb_free_vmemmap=
-                       [KNL] Reguires CONFIG_HUGETLB_PAGE_FREE_VMEMMAP
+                       [KNL] Reguires CONFIG_HUGETLB_PAGE_OPTIMIZE_VMEMMAP
                        enabled.
                        Allows heavy hugetlb users to free up some more
                        memory (7 * PAGE_SIZE for each 2MB hugetlb page).
@@ -1669,7 +1669,7 @@
                        on:  enable the feature
                        off: disable the feature
 
-                       Built with CONFIG_HUGETLB_PAGE_FREE_VMEMMAP_DEFAULT_ON=y,
+                       Built with CONFIG_HUGETLB_PAGE_OPTIMIZE_VMEMMAP_DEFAULT_ON=y,
                        the default is on.
 
                        This is not compatible with memory_hotplug.memmap_on_memory.

diff --git a/Documentation/admin-guide/mm/hugetlbpage.rst b/Documentation/admin-guide/mm/hugetlbpage.rst
index 0166f9de34281da23adbb69dacf0516c047a5cab..a90330d0a837375a1df4755bdb1bd7e9d37e470e 100644 (file)
--- a/Documentation/admin-guide/mm/hugetlbpage.rst
+++ b/Documentation/admin-guide/mm/hugetlbpage.rst
@@ -164,7 +164,7 @@ default_hugepagesz
        will all result in 256 2M huge pages being allocated.  Valid default
        huge page size is architecture dependent.
 hugetlb_free_vmemmap
-       When CONFIG_HUGETLB_PAGE_FREE_VMEMMAP is set, this enables freeing
+       When CONFIG_HUGETLB_PAGE_OPTIMIZE_VMEMMAP is set, this enables optimizing
        unused vmemmap pages associated with each HugeTLB page.
 
 When multiple huge page sizes are supported, ``/proc/sys/vm/nr_hugepages``

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 8da1f65ae398a352f99c8b830425830a1ff8c90d..cc0498652baedfa73795400c59eca77a4569743b 100644 (file)
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -97,7 +97,7 @@ config ARM64
        select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT
        select ARCH_WANT_FRAME_POINTERS
        select ARCH_WANT_HUGE_PMD_SHARE if ARM64_4K_PAGES || (ARM64_16K_PAGES && !ARM64_VA_BITS_36)
-       select ARCH_WANT_HUGETLB_PAGE_FREE_VMEMMAP
+       select ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP
        select ARCH_WANT_LD_ORPHAN_WARN
        select ARCH_WANTS_NO_INSTR
        select ARCH_HAS_UBSAN_SANITIZE_ALL

diff --git a/arch/arm64/mm/flush.c b/arch/arm64/mm/flush.c
index bbb2640f4f54ef1469c2cdfc3425e0c577ffd9dc..fc4f710e9820f17171969ec7336bacecd1432609 100644 (file)
--- a/arch/arm64/mm/flush.c
+++ b/arch/arm64/mm/flush.c
@@ -78,7 +78,7 @@ void flush_dcache_page(struct page *page)
        /*
         * Only the head page's flags of HugeTLB can be cleared since the tail
         * vmemmap pages associated with each HugeTLB page are mapped with
-        * read-only when CONFIG_HUGETLB_PAGE_FREE_VMEMMAP is enabled (more
+        * read-only when CONFIG_HUGETLB_PAGE_OPTIMIZE_VMEMMAP is enabled (more
         * details can refer to vmemmap_remap_pte()).  Although
         * __sync_icache_dcache() only set PG_dcache_clean flag on the head
         * page struct, there is more than one page struct with PG_dcache_clean

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 5b77b4301d3679b8849190c25d2f7469f0b6b15d..da07c8087e5a3875e66d3b8120db8dd53239a584 100644 (file)
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -121,7 +121,7 @@ config X86
        select ARCH_WANTS_NO_INSTR
        select ARCH_WANT_GENERAL_HUGETLB
        select ARCH_WANT_HUGE_PMD_SHARE
-       select ARCH_WANT_HUGETLB_PAGE_FREE_VMEMMAP      if X86_64
+       select ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP  if X86_64
        select ARCH_WANT_LD_ORPHAN_WARN
        select ARCH_WANTS_THP_SWAP              if X86_64
        select ARCH_HAS_PARANOID_L1D_FLUSH

diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 96d34ebb20a9e1e09e3a9e8eaf41f464a264d87e..af34dd1510d62ea0869b1f5b95ca1adaa13c9fad 100644 (file)
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -1269,7 +1269,7 @@ static struct kcore_list kcore_vsyscall;
 
 static void __init register_page_bootmem_info(void)
 {
-#if defined(CONFIG_NUMA) || defined(CONFIG_HUGETLB_PAGE_FREE_VMEMMAP)
+#if defined(CONFIG_NUMA) || defined(CONFIG_HUGETLB_PAGE_OPTIMIZE_VMEMMAP)
        int i;
 
        for_each_online_node(i)

diff --git a/fs/Kconfig b/fs/Kconfig
index 8f6ab1cf51154c89a7f2cdbe1631a14fc36ac583..5976eb33535ff0ab0fa5ce6a580e20c93a4285ba 100644 (file)
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -250,22 +250,22 @@ config HUGETLB_PAGE
 # to enable the feature of minimizing overhead of struct page associated with
 # each HugeTLB page.
 #
-config ARCH_WANT_HUGETLB_PAGE_FREE_VMEMMAP
+config ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP
        bool
 
-config HUGETLB_PAGE_FREE_VMEMMAP
+config HUGETLB_PAGE_OPTIMIZE_VMEMMAP
        def_bool HUGETLB_PAGE
-       depends on ARCH_WANT_HUGETLB_PAGE_FREE_VMEMMAP
+       depends on ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP
        depends on SPARSEMEM_VMEMMAP
 
-config HUGETLB_PAGE_FREE_VMEMMAP_DEFAULT_ON
-       bool "Default freeing vmemmap pages of HugeTLB to on"
+config HUGETLB_PAGE_OPTIMIZE_VMEMMAP_DEFAULT_ON
+       bool "Default optimizing vmemmap pages of HugeTLB to on"
        default n
-       depends on HUGETLB_PAGE_FREE_VMEMMAP
+       depends on HUGETLB_PAGE_OPTIMIZE_VMEMMAP
        help
-         When using HUGETLB_PAGE_FREE_VMEMMAP, the freeing unused vmemmap
+         When using HUGETLB_PAGE_OPTIMIZE_VMEMMAP, the optimizing unused vmemmap
          pages associated with each HugeTLB page is default off. Say Y here
-         to enable freeing vmemmap pages of HugeTLB by default. It can then
+         to enable optimizing vmemmap pages of HugeTLB by default. It can then
          be disabled on the command line via hugetlb_free_vmemmap=off.
 
 config MEMFD_CREATE

diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index 189bddb8eca41d6ecc0c2c292a36c34d0d2c62cd..ac2ece9e9c797ef3295552b35361d54612a7dbdf 100644 (file)
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -623,7 +623,7 @@ struct hstate {
        unsigned int nr_huge_pages_node[MAX_NUMNODES];
        unsigned int free_huge_pages_node[MAX_NUMNODES];
        unsigned int surplus_huge_pages_node[MAX_NUMNODES];
-#ifdef CONFIG_HUGETLB_PAGE_FREE_VMEMMAP
+#ifdef CONFIG_HUGETLB_PAGE_OPTIMIZE_VMEMMAP
        unsigned int optimize_vmemmap_pages;
 #endif
 #ifdef CONFIG_CGROUP_HUGETLB

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 16d6b46d2d3ef39a584168bb85adfcd36430e09e..a8f4c7e96ad58bcd6a0075b08f8ab14d0c8707fe 100644 (file)
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -3145,7 +3145,7 @@ static inline void print_vma_addr(char *prefix, unsigned long rip)
 }
 #endif
 
-#ifdef CONFIG_HUGETLB_PAGE_FREE_VMEMMAP
+#ifdef CONFIG_HUGETLB_PAGE_OPTIMIZE_VMEMMAP
 int vmemmap_remap_free(unsigned long start, unsigned long end,
                       unsigned long reuse);
 int vmemmap_remap_alloc(unsigned long start, unsigned long end,

diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h
index 573f499d5a2d6bcf178fa8c8ed99ee4628c62132..1ea896887ee4a4711075ac3425cfd24c041cdb03 100644 (file)
--- a/include/linux/page-flags.h
+++ b/include/linux/page-flags.h
@@ -190,13 +190,13 @@ enum pageflags {
 
 #ifndef __GENERATING_BOUNDS_H
 
-#ifdef CONFIG_HUGETLB_PAGE_FREE_VMEMMAP
-DECLARE_STATIC_KEY_MAYBE(CONFIG_HUGETLB_PAGE_FREE_VMEMMAP_DEFAULT_ON,
+#ifdef CONFIG_HUGETLB_PAGE_OPTIMIZE_VMEMMAP
+DECLARE_STATIC_KEY_MAYBE(CONFIG_HUGETLB_PAGE_OPTIMIZE_VMEMMAP_DEFAULT_ON,
                         hugetlb_optimize_vmemmap_key);
 
 static __always_inline bool hugetlb_optimize_vmemmap_enabled(void)
 {
-       return static_branch_maybe(CONFIG_HUGETLB_PAGE_FREE_VMEMMAP_DEFAULT_ON,
+       return static_branch_maybe(CONFIG_HUGETLB_PAGE_OPTIMIZE_VMEMMAP_DEFAULT_ON,
                                   &hugetlb_optimize_vmemmap_key);
 }
 

diff --git a/mm/Makefile b/mm/Makefile
index 4cc13f3179a518064ae121d531b9a9ddfec734c2..6f9ffa968a1a13e9e303d8e7fb1a038b4c477f40 100644 (file)
--- a/mm/Makefile
+++ b/mm/Makefile
@@ -77,7 +77,7 @@ obj-$(CONFIG_FRONTSWAP)       += frontswap.o
 obj-$(CONFIG_ZSWAP)    += zswap.o
 obj-$(CONFIG_HAS_DMA)  += dmapool.o
 obj-$(CONFIG_HUGETLBFS)        += hugetlb.o
-obj-$(CONFIG_HUGETLB_PAGE_FREE_VMEMMAP)        += hugetlb_vmemmap.o
+obj-$(CONFIG_HUGETLB_PAGE_OPTIMIZE_VMEMMAP)    += hugetlb_vmemmap.o
 obj-$(CONFIG_NUMA)     += mempolicy.o
 obj-$(CONFIG_SPARSEMEM)        += sparse.o
 obj-$(CONFIG_SPARSEMEM_VMEMMAP) += sparse-vmemmap.o

diff --git a/mm/hugetlb_vmemmap.c b/mm/hugetlb_vmemmap.c
index f2529497339817ac61b5750a9329c78d1c8888c1..2655434a946bd6333a1fef01d0b8a8b29c1c6ba9 100644 (file)
--- a/mm/hugetlb_vmemmap.c
+++ b/mm/hugetlb_vmemmap.c
@@ -188,7 +188,7 @@
 #define RESERVE_VMEMMAP_NR             1U
 #define RESERVE_VMEMMAP_SIZE           (RESERVE_VMEMMAP_NR << PAGE_SHIFT)
 
-DEFINE_STATIC_KEY_MAYBE(CONFIG_HUGETLB_PAGE_FREE_VMEMMAP_DEFAULT_ON,
+DEFINE_STATIC_KEY_MAYBE(CONFIG_HUGETLB_PAGE_OPTIMIZE_VMEMMAP_DEFAULT_ON,
                        hugetlb_optimize_vmemmap_key);
 EXPORT_SYMBOL(hugetlb_optimize_vmemmap_key);
 
@@ -276,7 +276,7 @@ void __init hugetlb_vmemmap_init(struct hstate *h)
 
        /*
         * There are only (RESERVE_VMEMMAP_SIZE / sizeof(struct page)) struct
-        * page structs that can be used when CONFIG_HUGETLB_PAGE_FREE_VMEMMAP,
+        * page structs that can be used when CONFIG_HUGETLB_PAGE_OPTIMIZE_VMEMMAP,
         * so add a BUILD_BUG_ON to catch invalid usage of the tail struct page.
         */
        BUILD_BUG_ON(__NR_USED_SUBPAGE >=

diff --git a/mm/hugetlb_vmemmap.h b/mm/hugetlb_vmemmap.h
index 9760537849b5755d99c763f371e9a443f3ccd54b..109b0a53b6fe9b6e79694ab7830afa0cd2e03343 100644 (file)
--- a/mm/hugetlb_vmemmap.h
+++ b/mm/hugetlb_vmemmap.h
@@ -10,7 +10,7 @@
 #define _LINUX_HUGETLB_VMEMMAP_H
 #include <linux/hugetlb.h>
 
-#ifdef CONFIG_HUGETLB_PAGE_FREE_VMEMMAP
+#ifdef CONFIG_HUGETLB_PAGE_OPTIMIZE_VMEMMAP
 int hugetlb_vmemmap_alloc(struct hstate *h, struct page *head);
 void hugetlb_vmemmap_free(struct hstate *h, struct page *head);
 void hugetlb_vmemmap_init(struct hstate *h);
@@ -41,5 +41,5 @@ static inline unsigned int hugetlb_optimize_vmemmap_pages(struct hstate *h)
 {
        return 0;
 }
-#endif /* CONFIG_HUGETLB_PAGE_FREE_VMEMMAP */
+#endif /* CONFIG_HUGETLB_PAGE_OPTIMIZE_VMEMMAP */
 #endif /* _LINUX_HUGETLB_VMEMMAP_H */

diff --git a/mm/sparse-vmemmap.c b/mm/sparse-vmemmap.c
index 8aecd6b3896c783a46b47ee4f54a2fe53f6dc0b4..52f36527bab303a64ae92874df371e56174bb588 100644 (file)
--- a/mm/sparse-vmemmap.c
+++ b/mm/sparse-vmemmap.c
@@ -34,7 +34,7 @@
 #include <asm/pgalloc.h>
 #include <asm/tlbflush.h>
 
-#ifdef CONFIG_HUGETLB_PAGE_FREE_VMEMMAP
+#ifdef CONFIG_HUGETLB_PAGE_OPTIMIZE_VMEMMAP
 /**
  * struct vmemmap_remap_walk - walk vmemmap page table
  *
@@ -420,7 +420,7 @@ int vmemmap_remap_alloc(unsigned long start, unsigned long end,
 
        return 0;
 }
-#endif /* CONFIG_HUGETLB_PAGE_FREE_VMEMMAP */
+#endif /* CONFIG_HUGETLB_PAGE_OPTIMIZE_VMEMMAP */
 
 /*
  * Allocate a block of memory to be used to back the virtual memory map