The patch titled
/proc/pid/smaps: export amount of anonymous memory in a mapping
has been added to the -mm tree. Its filename is
proc-pid-smaps-export-amount-of-anonymous-memory-in-a-mapping.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find
out what to do about this
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: /proc/pid/smaps: export amount of anonymous memory in a mapping
From: Nikanth Karthikesan <knikanth@xxxxxxx>
Export the number of anonymous pages in a mapping via smaps.
Even the private pages in a mapping backed by a file, would be marked as
anonymous, when they are modified. Export this information to user-space via
smaps.
Exporting this count will help gdb to make a better decision on which
areas need to be dumped in its coredump; and should be useful to others
studying the memory usage of a process.
Signed-off-by: Nikanth Karthikesan <knikanth@xxxxxxx>
Acked-by: Hugh Dickins <hughd@xxxxxxxxxx>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
Cc: Matt Mackall <mpm@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/proc/task_mmu.c | 6 ++++++
1 file changed, 6 insertions(+)
diff -puN fs/proc/task_mmu.c~proc-pid-smaps-export-amount-of-anonymous-memory-in-a-mapping fs/proc/task_mmu.c
--- a/fs/proc/task_mmu.c~proc-pid-smaps-export-amount-of-anonymous-memory-in-a-mapping
+++ a/fs/proc/task_mmu.c
@@ -327,6 +327,7 @@ struct mem_size_stats {
unsigned long private_clean;
unsigned long private_dirty;
unsigned long referenced;
+ unsigned long anonymous;
unsigned long swap;
u64 pss;
};
@@ -357,6 +358,9 @@ static int smaps_pte_range(pmd_t *pmd, u
if (!page)
continue;
+ if (PageAnon(page))
+ mss->anonymous += PAGE_SIZE;
+
mss->resident += PAGE_SIZE;
/* Accumulate the size in pages that have been accessed. */
if (pte_young(ptent) || PageReferenced(page))
@@ -410,6 +414,7 @@ static int show_smap(struct seq_file *m,
"Private_Clean: %8lu kB\n"
"Private_Dirty: %8lu kB\n"
"Referenced: %8lu kB\n"
+ "Anonymous: %8lu kB\n"
"Swap: %8lu kB\n"
"KernelPageSize: %8lu kB\n"
"MMUPageSize: %8lu kB\n",
@@ -421,6 +426,7 @@ static int show_smap(struct seq_file *m,
mss.private_clean >> 10,
mss.private_dirty >> 10,
mss.referenced >> 10,
+ mss.anonymous >> 10,
mss.swap >> 10,
vma_kernel_pagesize(vma) >> 10,
vma_mmu_pagesize(vma) >> 10);
_
Patches currently in -mm which might be from knikanth@xxxxxxx are
linux-next.patch
proc-pid-smaps-export-amount-of-anonymous-memory-in-a-mapping.patch
documentation-filesystems-proctxt-improve-smaps-field-documentation.patch
mm-smaps-export-mlock-information.patch
--
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
