feat: enable transparent huge pages in madvise mode

Fixes siderolabs/talos#9363

This way THP are only enabled if the application explicitly tries to use
them.

Signed-off-by: Andrey Smirnov <andrey.smirnov@siderolabs.com>
(cherry picked from commit 2c5785b)

kernel/build/config-amd64

@@ -815,6 +815,7 @@ CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD=y
 CONFIG_HAVE_ARCH_HUGE_VMAP=y
 CONFIG_HAVE_ARCH_HUGE_VMALLOC=y
 CONFIG_ARCH_WANT_HUGE_PMD_SHARE=y
+CONFIG_ARCH_WANT_PMD_MKWRITE=y
 CONFIG_HAVE_ARCH_SOFT_DIRTY=y
 CONFIG_HAVE_MOD_ARCH_SPECIFIC=y
 CONFIG_MODULES_USE_ELF_RELA=y
@@ -1042,6 +1043,7 @@ CONFIG_COMPACT_UNEVICTABLE_DEFAULT=1
 CONFIG_PAGE_REPORTING=y
 CONFIG_MIGRATION=y
 CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION=y
+CONFIG_ARCH_ENABLE_THP_MIGRATION=y
 CONFIG_PCP_BATCH_SCALE_MAX=5
 CONFIG_PHYS_ADDR_T_64BIT=y
 CONFIG_MMU_NOTIFIER=y
@@ -1051,7 +1053,11 @@ CONFIG_ARCH_SUPPORTS_MEMORY_FAILURE=y
 # CONFIG_MEMORY_FAILURE is not set
 CONFIG_ARCH_WANT_GENERAL_HUGETLB=y
 CONFIG_ARCH_WANTS_THP_SWAP=y
-# CONFIG_TRANSPARENT_HUGEPAGE is not set
+CONFIG_TRANSPARENT_HUGEPAGE=y
+# CONFIG_TRANSPARENT_HUGEPAGE_ALWAYS is not set
+CONFIG_TRANSPARENT_HUGEPAGE_MADVISE=y
+CONFIG_THP_SWAP=y
+# CONFIG_READ_ONLY_THP_FOR_FS is not set
 CONFIG_NEED_PER_CPU_EMBED_FIRST_CHUNK=y
 CONFIG_NEED_PER_CPU_PAGE_FIRST_CHUNK=y
 CONFIG_USE_PERCPU_NUMA_NODE_ID=y
@@ -5373,6 +5379,7 @@ CONFIG_USB4=m
 
 # CONFIG_LIBNVDIMM is not set
 CONFIG_DAX=y
+# CONFIG_DEV_DAX is not set
 CONFIG_NVMEM=y
 CONFIG_NVMEM_SYSFS=y
 
@@ -6151,6 +6158,7 @@ CONFIG_TEXTSEARCH_KMP=y
 CONFIG_TEXTSEARCH_BM=y
 CONFIG_TEXTSEARCH_FSM=y
 CONFIG_INTERVAL_TREE=y
+CONFIG_XARRAY_MULTI=y
 CONFIG_ASSOCIATIVE_ARRAY=y
 CONFIG_HAS_IOMEM=y
 CONFIG_HAS_IOPORT=y

kernel/build/config-arm64

@@ -810,6 +810,7 @@ CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE=y
 CONFIG_HAVE_ARCH_HUGE_VMAP=y
 CONFIG_HAVE_ARCH_HUGE_VMALLOC=y
 CONFIG_ARCH_WANT_HUGE_PMD_SHARE=y
+CONFIG_ARCH_WANT_PMD_MKWRITE=y
 CONFIG_HAVE_MOD_ARCH_SPECIFIC=y
 CONFIG_MODULES_USE_ELF_RELA=y
 CONFIG_HAVE_SOFTIRQ_ON_OWN_STACK=y
@@ -1076,6 +1077,7 @@ CONFIG_COMPACT_UNEVICTABLE_DEFAULT=1
 CONFIG_PAGE_REPORTING=y
 CONFIG_MIGRATION=y
 CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION=y
+CONFIG_ARCH_ENABLE_THP_MIGRATION=y
 CONFIG_CONTIG_ALLOC=y
 CONFIG_PCP_BATCH_SCALE_MAX=5
 CONFIG_PHYS_ADDR_T_64BIT=y
@@ -1085,7 +1087,11 @@ CONFIG_DEFAULT_MMAP_MIN_ADDR=32768
 CONFIG_ARCH_SUPPORTS_MEMORY_FAILURE=y
 # CONFIG_MEMORY_FAILURE is not set
 CONFIG_ARCH_WANTS_THP_SWAP=y
-# CONFIG_TRANSPARENT_HUGEPAGE is not set
+CONFIG_TRANSPARENT_HUGEPAGE=y
+# CONFIG_TRANSPARENT_HUGEPAGE_ALWAYS is not set
+CONFIG_TRANSPARENT_HUGEPAGE_MADVISE=y
+CONFIG_THP_SWAP=y
+# CONFIG_READ_ONLY_THP_FOR_FS is not set
 CONFIG_NEED_PER_CPU_EMBED_FIRST_CHUNK=y
 CONFIG_NEED_PER_CPU_PAGE_FIRST_CHUNK=y
 CONFIG_USE_PERCPU_NUMA_NODE_ID=y
@@ -7984,6 +7990,7 @@ CONFIG_ND_BTT=y
 CONFIG_BTT=y
 CONFIG_OF_PMEM=y
 CONFIG_DAX=y
+# CONFIG_DEV_DAX is not set
 # CONFIG_DEV_DAX_HMEM is not set
 CONFIG_NVMEM=y
 CONFIG_NVMEM_SYSFS=y