The patch titled
smaps: add pages referenced count to smaps
has been added to the -mm tree. Its filename is
smaps-add-pages-referenced-count-to-smaps.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: smaps: add pages referenced count to smaps
From: David Rientjes <rientjes@xxxxxxxxxx>
Adds an additional unsigned long field to struct mem_size_stats called
'referenced'. For each pte walked in the smaps code, this field is
incremented by PAGE_SIZE if it has pte-reference bits.
An additional line was added to the /proc/pid/smaps output for each VMA to
indicate how many pages within it are currently marked as referenced or
accessed.
Cc: Hugh Dickins <hugh@xxxxxxxxxxx>
Cc: Paul Mundt <lethal@xxxxxxxxxxxx>
Cc: Christoph Lameter <clameter@xxxxxxx>
Signed-off-by: David Rientjes <rientjes@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/proc/task_mmu.c | 20 +++++++++++++-------
1 files changed, 13 insertions(+), 7 deletions(-)
diff -puN fs/proc/task_mmu.c~smaps-add-pages-referenced-count-to-smaps fs/proc/task_mmu.c
--- a/fs/proc/task_mmu.c~smaps-add-pages-referenced-count-to-smaps
+++ a/fs/proc/task_mmu.c
@@ -120,6 +120,7 @@ struct mem_size_stats
unsigned long shared_dirty;
unsigned long private_clean;
unsigned long private_dirty;
+ unsigned long referenced;
};
struct pmd_walker {
@@ -188,18 +189,20 @@ static int show_map_internal(struct seq_
if (mss)
seq_printf(m,
- "Size: %8lu kB\n"
- "Rss: %8lu kB\n"
- "Shared_Clean: %8lu kB\n"
- "Shared_Dirty: %8lu kB\n"
- "Private_Clean: %8lu kB\n"
- "Private_Dirty: %8lu kB\n",
+ "Size: %8lu kB\n"
+ "Rss: %8lu kB\n"
+ "Shared_Clean: %8lu kB\n"
+ "Shared_Dirty: %8lu kB\n"
+ "Private_Clean: %8lu kB\n"
+ "Private_Dirty: %8lu kB\n"
+ "Pgs_Referenced: %8lu kB\n",
(vma->vm_end - vma->vm_start) >> 10,
mss->resident >> 10,
mss->shared_clean >> 10,
mss->shared_dirty >> 10,
mss->private_clean >> 10,
- mss->private_dirty >> 10);
+ mss->private_dirty >> 10,
+ mss->referenced >> 10);
if (m->count < m->size) /* vma is copied successfully */
m->version = (vma != get_gate_vma(task))? vma->vm_start: 0;
@@ -232,6 +235,9 @@ static void smaps_one_pmd(struct vm_area
if (!page)
continue;
+ /* Accumulate the size in pages that have been accessed. */
+ if (pte_young(ptent) || PageReferenced(page))
+ mss->referenced += PAGE_SIZE;
if (page_mapcount(page) >= 2) {
if (pte_dirty(ptent))
mss->shared_dirty += PAGE_SIZE;
_
Patches currently in -mm which might be from rientjes@xxxxxxxxxx are
smaps-extract-pmd-walker-from-smaps-code.patch
smaps-add-pages-referenced-count-to-smaps.patch
smaps-add-clear_refs-file-to-clear-reference.patch
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