From ea606cf5d8df370e7932460dfd960b21f20e7c6d Mon Sep 17 00:00:00 2001 From: Andrey Ryabinin Date: Thu, 17 Mar 2016 14:18:48 -0700 Subject: [PATCH] mm: move max_map_count bits into mm.h max_map_count sysctl unrelated to scheduler. Move its bits from include/linux/sched/sysctl.h to include/linux/mm.h. Signed-off-by: Andrey Ryabinin Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/mm.h | 21 +++++++++++++++++++++ include/linux/sched/sysctl.h | 21 --------------------- mm/mmap.c | 1 - mm/mremap.c | 1 - mm/nommu.c | 1 - 5 files changed, 21 insertions(+), 24 deletions(-) diff --git a/include/linux/mm.h b/include/linux/mm.h index dbf1eddab964..6922adf41938 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -82,6 +82,27 @@ extern int mmap_rnd_compat_bits __read_mostly; #define mm_forbids_zeropage(X) (0) #endif +/* + * Default maximum number of active map areas, this limits the number of vmas + * per mm struct. Users can overwrite this number by sysctl but there is a + * problem. + * + * When a program's coredump is generated as ELF format, a section is created + * per a vma. In ELF, the number of sections is represented in unsigned short. + * This means the number of sections should be smaller than 65535 at coredump. + * Because the kernel adds some informative sections to a image of program at + * generating coredump, we need some margin. The number of extra sections is + * 1-3 now and depends on arch. We use "5" as safe margin, here. + * + * ELF extended numbering allows more than 65535 sections, so 16-bit bound is + * not a hard limit any more. Although some userspace tools can be surprised by + * that. + */ +#define MAPCOUNT_ELF_CORE_MARGIN (5) +#define DEFAULT_MAX_MAP_COUNT (USHRT_MAX - MAPCOUNT_ELF_CORE_MARGIN) + +extern int sysctl_max_map_count; + extern unsigned long sysctl_user_reserve_kbytes; extern unsigned long sysctl_admin_reserve_kbytes; diff --git a/include/linux/sched/sysctl.h b/include/linux/sched/sysctl.h index 4f080ab4f2cd..22db1e63707e 100644 --- a/include/linux/sched/sysctl.h +++ b/include/linux/sched/sysctl.h @@ -14,27 +14,6 @@ extern int proc_dohung_task_timeout_secs(struct ctl_table *table, int write, enum { sysctl_hung_task_timeout_secs = 0 }; #endif -/* - * Default maximum number of active map areas, this limits the number of vmas - * per mm struct. Users can overwrite this number by sysctl but there is a - * problem. - * - * When a program's coredump is generated as ELF format, a section is created - * per a vma. In ELF, the number of sections is represented in unsigned short. - * This means the number of sections should be smaller than 65535 at coredump. - * Because the kernel adds some informative sections to a image of program at - * generating coredump, we need some margin. The number of extra sections is - * 1-3 now and depends on arch. We use "5" as safe margin, here. - * - * ELF extended numbering allows more than 65535 sections, so 16-bit bound is - * not a hard limit any more. Although some userspace tools can be surprised by - * that. - */ -#define MAPCOUNT_ELF_CORE_MARGIN (5) -#define DEFAULT_MAX_MAP_COUNT (USHRT_MAX - MAPCOUNT_ELF_CORE_MARGIN) - -extern int sysctl_max_map_count; - extern unsigned int sysctl_sched_latency; extern unsigned int sysctl_sched_min_granularity; extern unsigned int sysctl_sched_wakeup_granularity; diff --git a/mm/mmap.c b/mm/mmap.c index 90e3b869a8b9..676f422f2e2c 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -37,7 +37,6 @@ #include #include #include -#include #include #include #include diff --git a/mm/mremap.c b/mm/mremap.c index 8eeba02fc991..e30c8a6489a6 100644 --- a/mm/mremap.c +++ b/mm/mremap.c @@ -20,7 +20,6 @@ #include #include #include -#include #include #include diff --git a/mm/nommu.c b/mm/nommu.c index fbf6f0f1d6c9..9bdf8b119078 100644 --- a/mm/nommu.c +++ b/mm/nommu.c @@ -33,7 +33,6 @@ #include #include #include -#include #include #include -- 2.30.2