The patch titled
maps: make /proc/pid/clear_refs option under CONFIG_EMBEDDED
has been added to the -mm tree. Its filename is
maps2-make-proc-pid-clear_refs-option-under-config_embedded.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: maps: make /proc/pid/clear_refs option under CONFIG_EMBEDDED
From: Matt Mackall <mpm@xxxxxxxxxxx>
This interface is primarily useful for doing memory profiling and not much use
on deployed embedded boxes. Make it optional. Together with /proc/pid/smaps,
this save a few K.
Signed-off-by: Matt Mackall <mpm@xxxxxxxxxxx>
Cc: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Acked-by: David Rientjes <rientjes@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/proc/base.c | 4 ++++
fs/proc/task_mmu.c | 2 ++
init/Kconfig | 9 +++++++++
3 files changed, 15 insertions(+)
diff -puN fs/proc/base.c~maps2-make-proc-pid-clear_refs-option-under-config_embedded fs/proc/base.c
--- a/fs/proc/base.c~maps2-make-proc-pid-clear_refs-option-under-config_embedded
+++ a/fs/proc/base.c
@@ -1852,7 +1852,9 @@ static struct pid_entry tgid_base_stuff[
REG("mounts", S_IRUGO, mounts),
REG("mountstats", S_IRUSR, mountstats),
#ifdef CONFIG_MMU
+#ifdef CONFIG_PROC_CLEAR_REFS
REG("clear_refs", S_IWUSR, clear_refs),
+#endif
#ifdef CONFIG_PROC_SMAPS
REG("smaps", S_IRUGO, smaps),
#endif
@@ -2136,7 +2138,9 @@ static struct pid_entry tid_base_stuff[]
LNK("exe", exe),
REG("mounts", S_IRUGO, mounts),
#ifdef CONFIG_MMU
+#ifdef CONFIG_PROC_CLEAR_REFS
REG("clear_refs", S_IWUSR, clear_refs),
+#endif
#ifdef CONFIG_PROC_SMAPS
REG("smaps", S_IRUGO, smaps),
#endif
diff -puN fs/proc/task_mmu.c~maps2-make-proc-pid-clear_refs-option-under-config_embedded fs/proc/task_mmu.c
--- a/fs/proc/task_mmu.c~maps2-make-proc-pid-clear_refs-option-under-config_embedded
+++ a/fs/proc/task_mmu.c
@@ -420,6 +420,7 @@ const struct file_operations proc_smaps_
};
#endif
+#ifdef CONFIG_PROC_CLEAR_REFS
static int clear_refs_pte_range(pmd_t *pmd, unsigned long addr,
unsigned long end, void *private)
{
@@ -489,6 +490,7 @@ static ssize_t clear_refs_write(struct f
const struct file_operations proc_clear_refs_operations = {
.write = clear_refs_write,
};
+#endif
#ifdef CONFIG_NUMA
extern int show_numa_map(struct seq_file *m, void *v);
diff -puN init/Kconfig~maps2-make-proc-pid-clear_refs-option-under-config_embedded init/Kconfig
--- a/init/Kconfig~maps2-make-proc-pid-clear_refs-option-under-config_embedded
+++ a/init/Kconfig
@@ -500,6 +500,15 @@ config PROC_SMAPS
shared memory per mapping. Disabling this interface will reduce
the size of the kernel for small machines.
+config PROC_CLEAR_REFS
+ default y
+ bool "Enable /proc/pid/clear_refs support" if EMBEDDED && PROC_FS && MMU
+ help
+ The /proc/pid/clear_refs interface allows clearing the
+ referenced bits on a process's memory maps to allow monitoring
+ working set size. Disabling this interface will reduce
+ the size of the kernel for small machines.
+
endmenu # General setup
config RT_MUTEXES
_
Patches currently in -mm which might be from mpm@xxxxxxxxxxx are
slab-introduce-krealloc.patch
slab-introduce-krealloc-fix.patch
smaps-add-clear_refs-file-to-clear-reference-cleanup.patch
maps2-uninline-some-functions-in-the-page-walker.patch
maps2-eliminate-the-pmd_walker-struct-in-the-page-walker.patch
maps2-remove-vma-from-args-in-the-page-walker.patch
maps2-propagate-errors-from-callback-in-page-walker.patch
maps2-add-callbacks-for-each-level-to-page-walker.patch
maps2-move-the-page-walker-code-to-lib.patch
maps2-simplify-interdependence-of-proc-pid-maps-and-smaps.patch
maps2-move-clear_refs-code-to-task_mmuc.patch
maps2-regroup-task_mmu-by-interface.patch
maps2-make-proc-pid-smaps-optional-under-config_embedded.patch
maps2-make-proc-pid-clear_refs-option-under-config_embedded.patch
maps2-add-proc-pid-pagemap-interface.patch
maps2-add-proc-kpagemap-interface.patch
-
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