From 2d337b7158f8c38dacf8394028ab87b8a25ed707 Mon Sep 17 00:00:00 2001 From: ZhangPeng Date: Wed, 1 Mar 2023 10:06:27 +0000 Subject: userfaultfd: move unprivileged_userfaultfd sysctl to its own file The sysctl_unprivileged_userfaultfd is part of userfaultfd, move it to its own file. Signed-off-by: ZhangPeng Signed-off-by: Luis Chamberlain --- kernel/sysctl.c | 11 ----------- 1 file changed, 11 deletions(-) (limited to 'kernel') diff --git a/kernel/sysctl.c b/kernel/sysctl.c index 1c240d2c99bc..c14552a662ae 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -2438,17 +2438,6 @@ static struct ctl_table vm_table[] = { .extra1 = (void *)&mmap_rnd_compat_bits_min, .extra2 = (void *)&mmap_rnd_compat_bits_max, }, -#endif -#ifdef CONFIG_USERFAULTFD - { - .procname = "unprivileged_userfaultfd", - .data = &sysctl_unprivileged_userfaultfd, - .maxlen = sizeof(sysctl_unprivileged_userfaultfd), - .mode = 0644, - .proc_handler = proc_dointvec_minmax, - .extra1 = SYSCTL_ZERO, - .extra2 = SYSCTL_ONE, - }, #endif { } }; -- cgit v1.2.3-58-ga151 From 962de54828c5bb100eb8de881b79ed9c8b7468c0 Mon Sep 17 00:00:00 2001 From: Kefeng Wang Date: Thu, 9 Mar 2023 20:20:11 +0800 Subject: mm: hugetlb: move hugeltb sysctls to its own file This moves all hugetlb sysctls to its own file, also kill an useless hugetlb_treat_movable_handler() defination. Signed-off-by: Kefeng Wang Reviewed-by: Luis Chamberlain Reviewed-by: Mike Kravetz Reviewed-by: Muchun Song Signed-off-by: Luis Chamberlain --- include/linux/hugetlb.h | 8 -------- kernel/sysctl.c | 32 ------------------------------- mm/hugetlb.c | 51 ++++++++++++++++++++++++++++++++++++++++++++++--- 3 files changed, 48 insertions(+), 43 deletions(-) (limited to 'kernel') diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h index 7c977d234aba..4056b05d81ed 100644 --- a/include/linux/hugetlb.h +++ b/include/linux/hugetlb.h @@ -124,14 +124,6 @@ void hugepage_put_subpool(struct hugepage_subpool *spool); void hugetlb_dup_vma_private(struct vm_area_struct *vma); void clear_vma_resv_huge_pages(struct vm_area_struct *vma); -int hugetlb_sysctl_handler(struct ctl_table *, int, void *, size_t *, loff_t *); -int hugetlb_overcommit_handler(struct ctl_table *, int, void *, size_t *, - loff_t *); -int hugetlb_treat_movable_handler(struct ctl_table *, int, void *, size_t *, - loff_t *); -int hugetlb_mempolicy_sysctl_handler(struct ctl_table *, int, void *, size_t *, - loff_t *); - int move_hugetlb_page_tables(struct vm_area_struct *vma, struct vm_area_struct *new_vma, unsigned long old_addr, unsigned long new_addr, diff --git a/kernel/sysctl.c b/kernel/sysctl.c index c14552a662ae..ce0297acf97c 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -2140,38 +2140,6 @@ static struct ctl_table vm_table[] = { .extra1 = SYSCTL_ZERO, .extra2 = SYSCTL_ONE, }, -#endif -#ifdef CONFIG_HUGETLB_PAGE - { - .procname = "nr_hugepages", - .data = NULL, - .maxlen = sizeof(unsigned long), - .mode = 0644, - .proc_handler = hugetlb_sysctl_handler, - }, -#ifdef CONFIG_NUMA - { - .procname = "nr_hugepages_mempolicy", - .data = NULL, - .maxlen = sizeof(unsigned long), - .mode = 0644, - .proc_handler = &hugetlb_mempolicy_sysctl_handler, - }, -#endif - { - .procname = "hugetlb_shm_group", - .data = &sysctl_hugetlb_shm_group, - .maxlen = sizeof(gid_t), - .mode = 0644, - .proc_handler = proc_dointvec, - }, - { - .procname = "nr_overcommit_hugepages", - .data = NULL, - .maxlen = sizeof(unsigned long), - .mode = 0644, - .proc_handler = hugetlb_overcommit_handler, - }, #endif { .procname = "lowmem_reserve_ratio", diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 07abcb6eb203..0ee77c55e44e 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -4202,6 +4202,12 @@ static void __init hugetlb_sysfs_init(void) hugetlb_register_all_nodes(); } +#ifdef CONFIG_SYSCTL +static void hugetlb_sysctl_init(void); +#else +static inline void hugetlb_sysctl_init(void) { } +#endif + static int __init hugetlb_init(void) { int i; @@ -4257,6 +4263,7 @@ static int __init hugetlb_init(void) hugetlb_sysfs_init(); hugetlb_cgroup_file_init(); + hugetlb_sysctl_init(); #ifdef CONFIG_SMP num_fault_mutexes = roundup_pow_of_two(8 * num_possible_cpus()); @@ -4588,7 +4595,7 @@ out: return ret; } -int hugetlb_sysctl_handler(struct ctl_table *table, int write, +static int hugetlb_sysctl_handler(struct ctl_table *table, int write, void *buffer, size_t *length, loff_t *ppos) { @@ -4597,7 +4604,7 @@ int hugetlb_sysctl_handler(struct ctl_table *table, int write, } #ifdef CONFIG_NUMA -int hugetlb_mempolicy_sysctl_handler(struct ctl_table *table, int write, +static int hugetlb_mempolicy_sysctl_handler(struct ctl_table *table, int write, void *buffer, size_t *length, loff_t *ppos) { return hugetlb_sysctl_handler_common(true, table, write, @@ -4605,7 +4612,7 @@ int hugetlb_mempolicy_sysctl_handler(struct ctl_table *table, int write, } #endif /* CONFIG_NUMA */ -int hugetlb_overcommit_handler(struct ctl_table *table, int write, +static int hugetlb_overcommit_handler(struct ctl_table *table, int write, void *buffer, size_t *length, loff_t *ppos) { struct hstate *h = &default_hstate; @@ -4634,6 +4641,44 @@ out: return ret; } +static struct ctl_table hugetlb_table[] = { + { + .procname = "nr_hugepages", + .data = NULL, + .maxlen = sizeof(unsigned long), + .mode = 0644, + .proc_handler = hugetlb_sysctl_handler, + }, +#ifdef CONFIG_NUMA + { + .procname = "nr_hugepages_mempolicy", + .data = NULL, + .maxlen = sizeof(unsigned long), + .mode = 0644, + .proc_handler = &hugetlb_mempolicy_sysctl_handler, + }, +#endif + { + .procname = "hugetlb_shm_group", + .data = &sysctl_hugetlb_shm_group, + .maxlen = sizeof(gid_t), + .mode = 0644, + .proc_handler = proc_dointvec, + }, + { + .procname = "nr_overcommit_hugepages", + .data = NULL, + .maxlen = sizeof(unsigned long), + .mode = 0644, + .proc_handler = hugetlb_overcommit_handler, + }, + { } +}; + +static void hugetlb_sysctl_init(void) +{ + register_sysctl_init("vm", hugetlb_table); +} #endif /* CONFIG_SYSCTL */ void hugetlb_report_meminfo(struct seq_file *m) -- cgit v1.2.3-58-ga151 From 02a6b455fb35d29620ceaa0ed053ae9846f875ca Mon Sep 17 00:00:00 2001 From: Luis Chamberlain Date: Thu, 2 Mar 2023 12:28:22 -0800 Subject: seccomp: simplify sysctls with register_sysctl_init() register_sysctl_paths() is only needed if you have childs (directories) with entries. Just use register_sysctl_init() as it also does the kmemleak check for you. Acked-by: Kees Cook Signed-off-by: Luis Chamberlain --- kernel/seccomp.c | 15 +-------------- 1 file changed, 1 insertion(+), 14 deletions(-) (limited to 'kernel') diff --git a/kernel/seccomp.c b/kernel/seccomp.c index cebf26445f9e..d3e584065c7f 100644 --- a/kernel/seccomp.c +++ b/kernel/seccomp.c @@ -2368,12 +2368,6 @@ static int seccomp_actions_logged_handler(struct ctl_table *ro_table, int write, return ret; } -static struct ctl_path seccomp_sysctl_path[] = { - { .procname = "kernel", }, - { .procname = "seccomp", }, - { } -}; - static struct ctl_table seccomp_sysctl_table[] = { { .procname = "actions_avail", @@ -2392,14 +2386,7 @@ static struct ctl_table seccomp_sysctl_table[] = { static int __init seccomp_sysctl_init(void) { - struct ctl_table_header *hdr; - - hdr = register_sysctl_paths(seccomp_sysctl_path, seccomp_sysctl_table); - if (!hdr) - pr_warn("sysctl registration failed\n"); - else - kmemleak_not_leak(hdr); - + register_sysctl_init("kernel/seccomp", seccomp_sysctl_table); return 0; } -- cgit v1.2.3-58-ga151 From 3d51cd8ea3c832c50c22e46354ac89e0964ea2d8 Mon Sep 17 00:00:00 2001 From: Luis Chamberlain Date: Fri, 10 Mar 2023 01:24:10 -0800 Subject: utsname: simplify one-level sysctl registration for uts_kern_table There is no need to declare an extra tables to just create directory, this can be easily be done with a prefix path with register_sysctl(). Simplify this registration. Reviewed-by: Christian Brauner Signed-off-by: Luis Chamberlain --- kernel/utsname_sysctl.c | 11 +---------- 1 file changed, 1 insertion(+), 10 deletions(-) (limited to 'kernel') diff --git a/kernel/utsname_sysctl.c b/kernel/utsname_sysctl.c index f50398cb790d..019e3a1566cf 100644 --- a/kernel/utsname_sysctl.c +++ b/kernel/utsname_sysctl.c @@ -123,15 +123,6 @@ static struct ctl_table uts_kern_table[] = { {} }; -static struct ctl_table uts_root_table[] = { - { - .procname = "kernel", - .mode = 0555, - .child = uts_kern_table, - }, - {} -}; - #ifdef CONFIG_PROC_SYSCTL /* * Notify userspace about a change in a certain entry of uts_kern_table, @@ -147,7 +138,7 @@ void uts_proc_notify(enum uts_proc proc) static int __init utsname_sysctl_init(void) { - register_sysctl_table(uts_root_table); + register_sysctl("kernel", uts_kern_table); return 0; } -- cgit v1.2.3-58-ga151 From 8cbc82f3ec0d58961cf9c1e5d99e56741f4bf134 Mon Sep 17 00:00:00 2001 From: Kefeng Wang Date: Mon, 20 Mar 2023 15:40:10 +0800 Subject: mm: memory-failure: Move memory failure sysctls to its own file The sysctl_memory_failure_early_kill and memory_failure_recovery are only used in memory-failure.c, move them to its own file. Acked-by: Naoya Horiguchi Signed-off-by: Kefeng Wang [mcgrof: fix by adding empty ctl entry, this caused a crash] Signed-off-by: Luis Chamberlain --- include/linux/mm.h | 2 -- kernel/sysctl.c | 20 -------------------- mm/memory-failure.c | 36 ++++++++++++++++++++++++++++++++++-- 3 files changed, 34 insertions(+), 24 deletions(-) (limited to 'kernel') diff --git a/include/linux/mm.h b/include/linux/mm.h index 1f79667824eb..98da268b834a 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -3442,8 +3442,6 @@ int mf_dax_kill_procs(struct address_space *mapping, pgoff_t index, extern int memory_failure(unsigned long pfn, int flags); extern void memory_failure_queue_kick(int cpu); extern int unpoison_memory(unsigned long pfn); -extern int sysctl_memory_failure_early_kill; -extern int sysctl_memory_failure_recovery; extern void shake_page(struct page *p); extern atomic_long_t num_poisoned_pages __read_mostly; extern int soft_offline_page(unsigned long pfn, int flags); diff --git a/kernel/sysctl.c b/kernel/sysctl.c index ce0297acf97c..0a8a3c9c82e4 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -2350,26 +2350,6 @@ static struct ctl_table vm_table[] = { .proc_handler = proc_dointvec, .extra1 = SYSCTL_ZERO, }, -#endif -#ifdef CONFIG_MEMORY_FAILURE - { - .procname = "memory_failure_early_kill", - .data = &sysctl_memory_failure_early_kill, - .maxlen = sizeof(sysctl_memory_failure_early_kill), - .mode = 0644, - .proc_handler = proc_dointvec_minmax, - .extra1 = SYSCTL_ZERO, - .extra2 = SYSCTL_ONE, - }, - { - .procname = "memory_failure_recovery", - .data = &sysctl_memory_failure_recovery, - .maxlen = sizeof(sysctl_memory_failure_recovery), - .mode = 0644, - .proc_handler = proc_dointvec_minmax, - .extra1 = SYSCTL_ZERO, - .extra2 = SYSCTL_ONE, - }, #endif { .procname = "user_reserve_kbytes", diff --git a/mm/memory-failure.c b/mm/memory-failure.c index fae9baf3be16..10e60b6b2447 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -62,13 +62,14 @@ #include #include #include +#include #include "swap.h" #include "internal.h" #include "ras/ras_event.h" -int sysctl_memory_failure_early_kill __read_mostly = 0; +static int sysctl_memory_failure_early_kill __read_mostly; -int sysctl_memory_failure_recovery __read_mostly = 1; +static int sysctl_memory_failure_recovery __read_mostly = 1; atomic_long_t num_poisoned_pages __read_mostly = ATOMIC_LONG_INIT(0); @@ -122,6 +123,37 @@ const struct attribute_group memory_failure_attr_group = { .attrs = memory_failure_attr, }; +#ifdef CONFIG_SYSCTL +static struct ctl_table memory_failure_table[] = { + { + .procname = "memory_failure_early_kill", + .data = &sysctl_memory_failure_early_kill, + .maxlen = sizeof(sysctl_memory_failure_early_kill), + .mode = 0644, + .proc_handler = proc_dointvec_minmax, + .extra1 = SYSCTL_ZERO, + .extra2 = SYSCTL_ONE, + }, + { + .procname = "memory_failure_recovery", + .data = &sysctl_memory_failure_recovery, + .maxlen = sizeof(sysctl_memory_failure_recovery), + .mode = 0644, + .proc_handler = proc_dointvec_minmax, + .extra1 = SYSCTL_ZERO, + .extra2 = SYSCTL_ONE, + }, + { } +}; + +static int __init memory_failure_sysctl_init(void) +{ + register_sysctl_init("vm", memory_failure_table); + return 0; +} +late_initcall(memory_failure_sysctl_init); +#endif /* CONFIG_SYSCTL */ + /* * Return values: * 1: the page is dissolved (if needed) and taken off from buddy, -- cgit v1.2.3-58-ga151 From 48fe8ab8d5a39c7bc49cb41d0ad92c75f48a9550 Mon Sep 17 00:00:00 2001 From: Minghao Chi Date: Tue, 28 Mar 2023 14:46:28 +0800 Subject: mm: compaction: move compaction sysctl to its own file This moves all compaction sysctls to its own file. Move sysctl to where the functionality truly belongs to improve readability, reduce merge conflicts, and facilitate maintenance. I use x86_defconfig and linux-next-20230327 branch $ make defconfig;make all -jn CONFIG_COMPACTION=y add/remove: 1/0 grow/shrink: 1/1 up/down: 350/-256 (94) Function old new delta vm_compaction - 320 +320 kcompactd_init 180 210 +30 vm_table 2112 1856 -256 Total: Before=21119987, After=21120081, chg +0.00% Despite the addition of 94 bytes the patch still seems a worthwile cleanup. Link: https://lore.kernel.org/lkml/067f7347-ba10-5405-920c-0f5f985c84f4@suse.cz/ Signed-off-by: Minghao Chi Acked-by: Vlastimil Babka Signed-off-by: Luis Chamberlain --- include/linux/compaction.h | 7 ---- kernel/sysctl.c | 59 -------------------------------- mm/compaction.c | 84 +++++++++++++++++++++++++++++++++++++++------- 3 files changed, 72 insertions(+), 78 deletions(-) (limited to 'kernel') diff --git a/include/linux/compaction.h b/include/linux/compaction.h index 52a9ff65faee..a6e512cfb670 100644 --- a/include/linux/compaction.h +++ b/include/linux/compaction.h @@ -81,13 +81,6 @@ static inline unsigned long compact_gap(unsigned int order) } #ifdef CONFIG_COMPACTION -extern unsigned int sysctl_compaction_proactiveness; -extern int sysctl_compaction_handler(struct ctl_table *table, int write, - void *buffer, size_t *length, loff_t *ppos); -extern int compaction_proactiveness_sysctl_handler(struct ctl_table *table, - int write, void *buffer, size_t *length, loff_t *ppos); -extern int sysctl_extfrag_threshold; -extern int sysctl_compact_unevictable_allowed; extern unsigned int extfrag_for_order(struct zone *zone, unsigned int order); extern int fragmentation_index(struct zone *zone, unsigned int order); diff --git a/kernel/sysctl.c b/kernel/sysctl.c index 0a8a3c9c82e4..bfe53e835524 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -42,7 +42,6 @@ #include #include #include -#include #include #include #include @@ -746,27 +745,6 @@ int proc_dointvec(struct ctl_table *table, int write, void *buffer, return do_proc_dointvec(table, write, buffer, lenp, ppos, NULL, NULL); } -#ifdef CONFIG_COMPACTION -static int proc_dointvec_minmax_warn_RT_change(struct ctl_table *table, - int write, void *buffer, size_t *lenp, loff_t *ppos) -{ - int ret, old; - - if (!IS_ENABLED(CONFIG_PREEMPT_RT) || !write) - return proc_dointvec_minmax(table, write, buffer, lenp, ppos); - - old = *(int *)table->data; - ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos); - if (ret) - return ret; - if (old != *(int *)table->data) - pr_warn_once("sysctl attribute %s changed by %s[%d]\n", - table->procname, current->comm, - task_pid_nr(current)); - return ret; -} -#endif - /** * proc_douintvec - read a vector of unsigned integers * @table: the sysctl table @@ -2157,43 +2135,6 @@ static struct ctl_table vm_table[] = { .extra1 = SYSCTL_ONE, .extra2 = SYSCTL_FOUR, }, -#ifdef CONFIG_COMPACTION - { - .procname = "compact_memory", - .data = NULL, - .maxlen = sizeof(int), - .mode = 0200, - .proc_handler = sysctl_compaction_handler, - }, - { - .procname = "compaction_proactiveness", - .data = &sysctl_compaction_proactiveness, - .maxlen = sizeof(sysctl_compaction_proactiveness), - .mode = 0644, - .proc_handler = compaction_proactiveness_sysctl_handler, - .extra1 = SYSCTL_ZERO, - .extra2 = SYSCTL_ONE_HUNDRED, - }, - { - .procname = "extfrag_threshold", - .data = &sysctl_extfrag_threshold, - .maxlen = sizeof(int), - .mode = 0644, - .proc_handler = proc_dointvec_minmax, - .extra1 = SYSCTL_ZERO, - .extra2 = SYSCTL_ONE_THOUSAND, - }, - { - .procname = "compact_unevictable_allowed", - .data = &sysctl_compact_unevictable_allowed, - .maxlen = sizeof(int), - .mode = 0644, - .proc_handler = proc_dointvec_minmax_warn_RT_change, - .extra1 = SYSCTL_ZERO, - .extra2 = SYSCTL_ONE, - }, - -#endif /* CONFIG_COMPACTION */ { .procname = "min_free_kbytes", .data = &min_free_kbytes, diff --git a/mm/compaction.c b/mm/compaction.c index 5a9501e0ae01..f2ddfb1140e2 100644 --- a/mm/compaction.c +++ b/mm/compaction.c @@ -1716,7 +1716,14 @@ typedef enum { * Allow userspace to control policy on scanning the unevictable LRU for * compactable pages. */ -int sysctl_compact_unevictable_allowed __read_mostly = CONFIG_COMPACT_UNEVICTABLE_DEFAULT; +static int sysctl_compact_unevictable_allowed __read_mostly = CONFIG_COMPACT_UNEVICTABLE_DEFAULT; +/* + * Tunable for proactive compaction. It determines how + * aggressively the kernel should compact memory in the + * background. It takes values in the range [0, 100]. + */ +static unsigned int __read_mostly sysctl_compaction_proactiveness = 20; +static int sysctl_extfrag_threshold = 500; static inline void update_fast_start_pfn(struct compact_control *cc, unsigned long pfn) @@ -2572,8 +2579,6 @@ static enum compact_result compact_zone_order(struct zone *zone, int order, return ret; } -int sysctl_extfrag_threshold = 500; - /** * try_to_compact_pages - Direct compact to satisfy a high-order allocation * @gfp_mask: The GFP mask of the current allocation @@ -2730,14 +2735,7 @@ static void compact_nodes(void) compact_node(nid); } -/* - * Tunable for proactive compaction. It determines how - * aggressively the kernel should compact memory in the - * background. It takes values in the range [0, 100]. - */ -unsigned int __read_mostly sysctl_compaction_proactiveness = 20; - -int compaction_proactiveness_sysctl_handler(struct ctl_table *table, int write, +static int compaction_proactiveness_sysctl_handler(struct ctl_table *table, int write, void *buffer, size_t *length, loff_t *ppos) { int rc, nid; @@ -2767,7 +2765,7 @@ int compaction_proactiveness_sysctl_handler(struct ctl_table *table, int write, * This is the entry point for compacting all nodes via * /proc/sys/vm/compact_memory */ -int sysctl_compaction_handler(struct ctl_table *table, int write, +static int sysctl_compaction_handler(struct ctl_table *table, int write, void *buffer, size_t *length, loff_t *ppos) { if (write) @@ -3063,6 +3061,65 @@ static int kcompactd_cpu_online(unsigned int cpu) return 0; } +static int proc_dointvec_minmax_warn_RT_change(struct ctl_table *table, + int write, void *buffer, size_t *lenp, loff_t *ppos) +{ + int ret, old; + + if (!IS_ENABLED(CONFIG_PREEMPT_RT) || !write) + return proc_dointvec_minmax(table, write, buffer, lenp, ppos); + + old = *(int *)table->data; + ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos); + if (ret) + return ret; + if (old != *(int *)table->data) + pr_warn_once("sysctl attribute %s changed by %s[%d]\n", + table->procname, current->comm, + task_pid_nr(current)); + return ret; +} + +#ifdef CONFIG_SYSCTL +static struct ctl_table vm_compaction[] = { + { + .procname = "compact_memory", + .data = NULL, + .maxlen = sizeof(int), + .mode = 0200, + .proc_handler = sysctl_compaction_handler, + }, + { + .procname = "compaction_proactiveness", + .data = &sysctl_compaction_proactiveness, + .maxlen = sizeof(sysctl_compaction_proactiveness), + .mode = 0644, + .proc_handler = compaction_proactiveness_sysctl_handler, + .extra1 = SYSCTL_ZERO, + .extra2 = SYSCTL_ONE_HUNDRED, + }, + { + .procname = "extfrag_threshold", + .data = &sysctl_extfrag_threshold, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = proc_dointvec_minmax, + .extra1 = SYSCTL_ZERO, + .extra2 = SYSCTL_ONE_THOUSAND, + }, + { + .procname = "compact_unevictable_allowed", + .data = &sysctl_compact_unevictable_allowed, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = proc_dointvec_minmax_warn_RT_change, + .extra1 = SYSCTL_ZERO, + .extra2 = SYSCTL_ONE, + }, + { } +}; +#endif + static int __init kcompactd_init(void) { int nid; @@ -3078,6 +3135,9 @@ static int __init kcompactd_init(void) for_each_node_state(nid, N_MEMORY) kcompactd_run(nid); +#ifdef CONFIG_SYSCTL + register_sysctl_init("vm", vm_compaction); +#endif return 0; } subsys_initcall(kcompactd_init) -- cgit v1.2.3-58-ga151