Show the amount of swapped out pages in /proc/<pid>/smaps.
Currently there's no way to know who is using the swap file.
A possible better way to support it is to add a new counter to struct_mm.
Or maybe not that important at all?
Signed-off-by: Fengguang Wu <[email protected]>
---
fs/proc/task_mmu.c | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)
--- linux-2.6.23-rc2-mm2.orig/fs/proc/task_mmu.c
+++ linux-2.6.23-rc2-mm2/fs/proc/task_mmu.c
@@ -324,6 +324,7 @@ struct mem_size_stats
unsigned long private_clean;
unsigned long private_dirty;
unsigned long referenced;
+ unsigned long swapped;
/*
* Proportional Set Size(PSS): my share of RSS.
@@ -367,8 +368,11 @@ static int smaps_pte_range(pmd_t *pmd, u
pte = pte_offset_map_lock(vma->vm_mm, pmd, addr, &ptl);
for (; addr != end; pte++, addr += PAGE_SIZE) {
ptent = *pte;
- if (!pte_present(ptent))
+ if (!pte_present(ptent)) {
+ if (!pte_none(ptent) && !pte_file(ptent))
+ mms->swapped += PAGE_SIZE;
continue;
+ }
mss->resident += PAGE_SIZE;
@@ -425,7 +429,8 @@ static int show_smap(struct seq_file *m,
"Shared_Dirty: %8lu kB\n"
"Private_Clean: %8lu kB\n"
"Private_Dirty: %8lu kB\n"
- "Referenced: %8lu kB\n",
+ "Referenced: %8lu kB\n"
+ "Swapped: %8lu kB\n",
(vma->vm_end - vma->vm_start) >> 10,
sarg.mss.resident >> 10,
(unsigned long)(sarg.mss.pss >> (10 + PSS_ERROR_BITS)),
@@ -433,7 +438,8 @@ static int show_smap(struct seq_file *m,
sarg.mss.shared_dirty >> 10,
sarg.mss.private_clean >> 10,
sarg.mss.private_dirty >> 10,
- sarg.mss.referenced >> 10);
+ sarg.mss.referenced >> 10,
+ sarg.mss.swapped >> 10);
return ret;
}
-
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