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| author | David Rientjes <rientjes@google.com> | 2007-05-06 14:49:22 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-07 12:12:52 -0700 |
| commit | f79f177c25016647cc92ffac8afa7cb96ce47011 (patch) | |
| tree | b613be041a467fd3ffaed7ad89d8694ede780dfa /fs/proc/task_mmu.c | |
| parent | 826fad1b93fdb4ffacfd9cd860f06140e852e377 (diff) | |
| download | lwn-f79f177c25016647cc92ffac8afa7cb96ce47011.tar.gz lwn-f79f177c25016647cc92ffac8afa7cb96ce47011.zip | |
smaps: add pages referenced count to smaps
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@veritas.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Christoph Lameter <clameter@sgi.com>
Signed-off-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/proc/task_mmu.c')
| -rw-r--r-- | fs/proc/task_mmu.c | 20 |
1 files changed, 13 insertions, 7 deletions
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c index 9d22c1c1caa8..199088ee969b 100644 --- a/fs/proc/task_mmu.c +++ b/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_file *m, void *v, struct mem_size_stats 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_struct *vma, pmd_t *pmd, 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; |