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authorMatt Mackall <mpm@selenic.com>2008-02-04 22:29:07 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-05 09:44:17 -0800
commit1e88328111aae3ea408f346763ba9f9bad71f876 (patch)
tree22be92057a7426ca5b6c8ee9b136bbc417c902a8
parent304daa8132a95e998b6716d4b7bd8bd76aa152b2 (diff)
downloadlinux-sh-1e88328111aae3ea408f346763ba9f9bad71f876.tar.gz
maps4: make page monitoring /proc file optional
Make /proc/ page monitoring configurable This puts the following files under an embedded config option: /proc/pid/clear_refs /proc/pid/smaps /proc/pid/pagemap /proc/kpagecount /proc/kpageflags [akpm@linux-foundation.org: Kconfig fix] Signed-off-by: Matt Mackall <mpm@selenic.com> Cc: Dave Hansen <haveblue@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--fs/proc/base.c4
-rw-r--r--fs/proc/proc_misc.c4
-rw-r--r--fs/proc/task_mmu.c2
-rw-r--r--init/Kconfig10
-rw-r--r--mm/Makefile3
5 files changed, 20 insertions, 3 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 9004db04efa0..cd9f84c4bbf5 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -2249,7 +2249,7 @@ static const struct pid_entry tgid_base_stuff[] = {
LNK("exe", exe),
REG("mounts", S_IRUGO, mounts),
REG("mountstats", S_IRUSR, mountstats),
-#ifdef CONFIG_MMU
+#ifdef CONFIG_PROC_PAGE_MONITOR
REG("clear_refs", S_IWUSR, clear_refs),
REG("smaps", S_IRUGO, smaps),
REG("pagemap", S_IRUSR, pagemap),
@@ -2578,7 +2578,7 @@ static const struct pid_entry tid_base_stuff[] = {
LNK("root", root),
LNK("exe", exe),
REG("mounts", S_IRUGO, mounts),
-#ifdef CONFIG_MMU
+#ifdef CONFIG_PROC_PAGE_MONITOR
REG("clear_refs", S_IWUSR, clear_refs),
REG("smaps", S_IRUGO, smaps),
REG("pagemap", S_IRUSR, pagemap),
diff --git a/fs/proc/proc_misc.c b/fs/proc/proc_misc.c
index fd751ea37fce..51288db37a0c 100644
--- a/fs/proc/proc_misc.c
+++ b/fs/proc/proc_misc.c
@@ -676,6 +676,7 @@ static const struct file_operations proc_sysrq_trigger_operations = {
};
#endif
+#ifdef CONFIG_PROC_PAGE_MONITOR
#define KPMSIZE sizeof(u64)
#define KPMMASK (KPMSIZE - 1)
/* /proc/kpagecount - an array exposing page counts
@@ -804,6 +805,7 @@ static struct file_operations proc_kpageflags_operations = {
.llseek = mem_lseek,
.read = kpageflags_read,
};
+#endif /* CONFIG_PROC_PAGE_MONITOR */
struct proc_dir_entry *proc_root_kcore;
@@ -885,8 +887,10 @@ void __init proc_misc_init(void)
(size_t)high_memory - PAGE_OFFSET + PAGE_SIZE;
}
#endif
+#ifdef CONFIG_PROC_PAGE_MONITOR
create_seq_entry("kpagecount", S_IRUSR, &proc_kpagecount_operations);
create_seq_entry("kpageflags", S_IRUSR, &proc_kpageflags_operations);
+#endif
#ifdef CONFIG_PROC_VMCORE
proc_vmcore = create_proc_entry("vmcore", S_IRUSR, NULL);
if (proc_vmcore)
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index bbd9b145051d..38338ed98cc6 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -337,6 +337,7 @@ const struct file_operations proc_maps_operations = {
*/
#define PSS_SHIFT 12
+#ifdef CONFIG_PROC_PAGE_MONITOR
struct mem_size_stats
{
struct vm_area_struct *vma;
@@ -717,6 +718,7 @@ const struct file_operations proc_pagemap_operations = {
.llseek = mem_lseek, /* borrow this */
.read = pagemap_read,
};
+#endif /* CONFIG_PROC_PAGE_MONITOR */
#ifdef CONFIG_NUMA
extern int show_numa_map(struct seq_file *m, void *v);
diff --git a/init/Kconfig b/init/Kconfig
index dc28836d9d00..aaa7e7d5305e 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -678,6 +678,16 @@ config MARKERS
source "arch/Kconfig"
+config PROC_PAGE_MONITOR
+ default y
+ depends on PROC_FS && MMU
+ bool "Enable /proc page monitoring" if EMBEDDED
+ help
+ Various /proc files exist to monitor process memory utilization:
+ /proc/pid/smaps, /proc/pid/clear_refs, /proc/pid/pagemap,
+ /proc/kpagecount, and /proc/kpageflags. Disabling these
+ interfaces will reduce the size of the kernel by approximately 4kb.
+
endmenu # General setup
config SLABINFO
diff --git a/mm/Makefile b/mm/Makefile
index 07f12132f8e5..44e2528af70c 100644
--- a/mm/Makefile
+++ b/mm/Makefile
@@ -5,7 +5,7 @@
mmu-y := nommu.o
mmu-$(CONFIG_MMU) := fremap.o highmem.o madvise.o memory.o mincore.o \
mlock.o mmap.o mprotect.o mremap.o msync.o rmap.o \
- vmalloc.o pagewalk.o
+ vmalloc.o
obj-y := bootmem.o filemap.o mempool.o oom_kill.o fadvise.o \
page_alloc.o page-writeback.o pdflush.o \
@@ -13,6 +13,7 @@ obj-y := bootmem.o filemap.o mempool.o oom_kill.o fadvise.o \
prio_tree.o util.o mmzone.o vmstat.o backing-dev.o \
page_isolation.o $(mmu-y)
+obj-$(CONFIG_PROC_PAGE_MONITOR) += pagewalk.o
obj-$(CONFIG_BOUNCE) += bounce.o
obj-$(CONFIG_SWAP) += page_io.o swap_state.o swapfile.o thrash.o
obj-$(CONFIG_HUGETLBFS) += hugetlb.o