The patch titled
maps4: make page monitoring /proc file optional
has been added to the -mm tree. Its filename is
maps4-make-page-monitoring-proc-file-optional.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: maps4: make page monitoring /proc file optional
From: Matt Mackall <mpm@xxxxxxxxxxx>
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
Signed-off-by: Matt Mackall <mpm@xxxxxxxxxxx>
Cc: Dave Hansen <haveblue@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/proc/base.c | 4 ++--
fs/proc/proc_misc.c | 4 ++++
fs/proc/task_mmu.c | 2 ++
init/Kconfig | 10 ++++++++++
mm/Makefile | 3 ++-
5 files changed, 20 insertions(+), 3 deletions(-)
diff -puN fs/proc/base.c~maps4-make-page-monitoring-proc-file-optional fs/proc/base.c
--- a/fs/proc/base.c~maps4-make-page-monitoring-proc-file-optional
+++ a/fs/proc/base.c
@@ -2157,7 +2157,7 @@ static const struct pid_entry tgid_base_
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),
@@ -2481,7 +2481,7 @@ static const struct pid_entry tid_base_s
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 -puN fs/proc/proc_misc.c~maps4-make-page-monitoring-proc-file-optional fs/proc/proc_misc.c
--- a/fs/proc/proc_misc.c~maps4-make-page-monitoring-proc-file-optional
+++ a/fs/proc/proc_misc.c
@@ -676,6 +676,7 @@ static const struct file_operations proc
};
#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_kpage
.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 -puN fs/proc/task_mmu.c~maps4-make-page-monitoring-proc-file-optional fs/proc/task_mmu.c
--- a/fs/proc/task_mmu.c~maps4-make-page-monitoring-proc-file-optional
+++ a/fs/proc/task_mmu.c
@@ -338,6 +338,7 @@ const struct file_operations proc_maps_o
*/
#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_pagema
.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 -puN init/Kconfig~maps4-make-page-monitoring-proc-file-optional init/Kconfig
--- a/init/Kconfig~maps4-make-page-monitoring-proc-file-optional
+++ a/init/Kconfig
@@ -644,6 +644,16 @@ config SLOB
endchoice
+config PROC_PAGE_MONITOR
+ default y
+ depends 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 RT_MUTEXES
diff -puN mm/Makefile~maps4-make-page-monitoring-proc-file-optional mm/Makefile
--- a/mm/Makefile~maps4-make-page-monitoring-proc-file-optional
+++ a/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
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
_
Patches currently in -mm which might be from mpm@xxxxxxxxxxx are
maps4-add-proportional-set-size-accounting-in-smaps.patch
maps4-from-dave-hansen-haveblue-usibmcom.patch
maps4-move-is_swap_pte.patch
maps4-introduce-a-generic-page-walker.patch
maps4-use-pagewalker-in-clear_refs-and-smaps.patch
maps4-simplify-interdependence-of-maps-and-smaps.patch
maps4-move-clear_refs-code-to-task_mmuc.patch
maps4-regroup-task_mmu-by-interface.patch
maps4-add-proc-pid-pagemap-interface.patch
maps4-add-proc-kpagecount-interface.patch
maps4-add-proc-kpageflags-interface.patch
maps4-make-page-monitoring-proc-file-optional.patch
-
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