/proc/pid/smaps: export amount of anonymous memory in a mapping
authorNikanth Karthikesan <knikanth@suse.de>
Wed, 27 Oct 2010 22:34:10 +0000 (15:34 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 28 Oct 2010 01:03:13 +0000 (18:03 -0700)
commitb40d4f84becd69275451baee7f0801c85eb58437
tree78258f7b431a900bf8292d25970dea74b8aa283f
parentd16e15f5b029fc7d03540ba0e5fb23b0abb0ebe0
/proc/pid/smaps: export amount of anonymous memory in a mapping

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@suse.de>
Acked-by: Hugh Dickins <hughd@google.com>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Matt Mackall <mpm@selenic.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Documentation/filesystems/proc.txt
fs/proc/task_mmu.c