[PATCH v4 -next 02/15] mm: filemap: move sysctl to mm/filemap.c
From: Kaixiong Yu <hidden>
Date: 2024-12-28 15:01:57
Also in:
linux-fsdevel, linux-mm, linux-nfs, linux-sh, lkml, netdev
Subsystem:
memory management, memory management - core, page cache, proc sysctl, the rest · Maintainers:
Andrew Morton, David Hildenbrand, Matthew Wilcox, Kees Cook, Joel Granados, Linus Torvalds
This moves the filemap related sysctl to mm/filemap.c, and removes the redundant external variable declaration. Signed-off-by: Kaixiong Yu <redacted> Reviewed-by: Kees Cook <kees@kernel.org> --- v4: - const qualify struct ctl_table filemap_sysctl_table v3: - change the title --- --- include/linux/mm.h | 2 -- kernel/sysctl.c | 8 -------- mm/filemap.c | 18 +++++++++++++++--- 3 files changed, 15 insertions(+), 13 deletions(-)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index d61b9c7a3a7b..dbdf8950d681 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h@@ -40,8 +40,6 @@ struct user_struct; struct pt_regs; struct folio_batch; -extern int sysctl_page_lock_unfairness; - void mm_core_init(void); void init_mm_internals(void);
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index f1ab251fc2d0..23c8db80da5d 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c@@ -2079,14 +2079,6 @@ static struct ctl_table vm_table[] = { .extra1 = SYSCTL_ONE, .extra2 = SYSCTL_FOUR, }, - { - .procname = "page_lock_unfairness", - .data = &sysctl_page_lock_unfairness, - .maxlen = sizeof(sysctl_page_lock_unfairness), - .mode = 0644, - .proc_handler = proc_dointvec_minmax, - .extra1 = SYSCTL_ZERO, - }, #ifdef CONFIG_MMU { .procname = "max_map_count",
diff --git a/mm/filemap.c b/mm/filemap.c
index 899dab55d235..bb7aff8960a4 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c@@ -47,6 +47,7 @@ #include <linux/splice.h> #include <linux/rcupdate_wait.h> #include <linux/sched/mm.h> +#include <linux/sysctl.h> #include <linux/fsnotify.h> #include <asm/pgalloc.h> #include <asm/tlbflush.h>
@@ -1069,6 +1070,19 @@ static wait_queue_head_t *folio_waitqueue(struct folio *folio) return &folio_wait_table[hash_ptr(folio, PAGE_WAIT_TABLE_BITS)]; } +/* How many times do we accept lock stealing from under a waiter? */ +static int sysctl_page_lock_unfairness = 5; +static const struct ctl_table filemap_sysctl_table[] = { + { + .procname = "page_lock_unfairness", + .data = &sysctl_page_lock_unfairness, + .maxlen = sizeof(sysctl_page_lock_unfairness), + .mode = 0644, + .proc_handler = proc_dointvec_minmax, + .extra1 = SYSCTL_ZERO, + } +}; + void __init pagecache_init(void) { int i;
@@ -1077,6 +1091,7 @@ void __init pagecache_init(void) init_waitqueue_head(&folio_wait_table[i]); page_writeback_init(); + register_sysctl_init("vm", filemap_sysctl_table); } /*
@@ -1224,9 +1239,6 @@ static inline bool folio_trylock_flag(struct folio *folio, int bit_nr, return true; } -/* How many times do we accept lock stealing from under a waiter? */ -int sysctl_page_lock_unfairness = 5; - static inline int folio_wait_bit_common(struct folio *folio, int bit_nr, int state, enum behavior behavior) {
--
2.34.1