It's currently inconvenient to retrieve MM_ANONPAGES value from status
and statm files and there is no way to separate MM_FILEPAGES and
MM_SHMEMPAGES. Add VmAnon, VmFile and VmShm lines in /proc/<pid>/status
to solve these issues.
Signed-off-by: Jerome Marchand <jmarchan@xxxxxxxxxx>
---
Documentation/filesystems/proc.txt | 10 +++++++++-
fs/proc/task_mmu.c | 11 ++++++++++-
2 files changed, 19 insertions(+), 2 deletions(-)
diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt
index 154a345..ffd4a7f 100644
--- a/Documentation/filesystems/proc.txt
+++ b/Documentation/filesystems/proc.txt
@@ -165,6 +165,9 @@ read the file /proc/PID/status:
VmLck: 0 kB
VmHWM: 476 kB
VmRSS: 476 kB
+ VmAnon: 352 kB
+ VmFile: 124 kB
+ VmShm: 4 kB
VmData: 156 kB
VmStk: 88 kB
VmExe: 68 kB
@@ -221,7 +224,12 @@ Table 1-2: Contents of the status files (as of 2.6.30-rc7)
VmSize total program size
VmLck locked memory size
VmHWM peak resident set size ("high water mark")
- VmRSS size of memory portions
+ VmRSS size of memory portions. It contains the three
+ following parts (VmRSS = VmAnon + VmFile + VmShm)
+ VmAnon size of resident anonymous memory
+ VmFile size of resident file mappings
+ VmShm size of resident shmem memory (includes SysV shm,
+ mapping of tmpfs and shared anonymous mappings)
VmData size of data, stack, and text segments
VmStk size of data, stack, and text segments
VmExe size of text segment
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 32657e3..762257f 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -21,7 +21,7 @@
void task_mem(struct seq_file *m, struct mm_struct *mm)
{
- unsigned long data, text, lib, swap;
+ unsigned long data, text, lib, swap, anon, file, shmem;
unsigned long hiwater_vm, total_vm, hiwater_rss, total_rss;
/*
@@ -38,6 +38,9 @@ void task_mem(struct seq_file *m, struct mm_struct *mm)
if (hiwater_rss < mm->hiwater_rss)
hiwater_rss = mm->hiwater_rss;
+ anon = get_mm_counter(mm, MM_ANONPAGES);
+ file = get_mm_counter(mm, MM_FILEPAGES);
+ shmem = get_mm_counter(mm, MM_SHMEMPAGES);
data = mm->total_vm - mm->shared_vm - mm->stack_vm;
text = (PAGE_ALIGN(mm->end_code) - (mm->start_code & PAGE_MASK)) >> 10;
lib = (mm->exec_vm << (PAGE_SHIFT-10)) - text;
@@ -49,6 +52,9 @@ void task_mem(struct seq_file *m, struct mm_struct *mm)
"VmPin:\t%8lu kB\n"
"VmHWM:\t%8lu kB\n"
"VmRSS:\t%8lu kB\n"
+ "VmAnon:\t%8lu kB\n"
+ "VmFile:\t%8lu kB\n"
+ "VmShm:\t%8lu kB\n"
"VmData:\t%8lu kB\n"
"VmStk:\t%8lu kB\n"
"VmExe:\t%8lu kB\n"
@@ -61,6 +67,9 @@ void task_mem(struct seq_file *m, struct mm_struct *mm)
mm->pinned_vm << (PAGE_SHIFT-10),
hiwater_rss << (PAGE_SHIFT-10),
total_rss << (PAGE_SHIFT-10),
+ anon << (PAGE_SHIFT-10),
+ file << (PAGE_SHIFT-10),
+ shmem << (PAGE_SHIFT-10),
data << (PAGE_SHIFT-10),
mm->stack_vm << (PAGE_SHIFT-10), text, lib,
(PTRS_PER_PTE * sizeof(pte_t) *
--
1.9.3
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