On Mon, 2010-09-20 at 00:11 -0700, Hugh Dickins wrote: > On Fri, 17 Sep 2010, Nikanth Karthikesan wrote: > > Document the new Anonymous field in smaps. > > Thanks for doing that, good effort, but your shifts between singular > and plural rather jarred on my ear, so I've rewritten it a little below. > Also added a sentence on "Swap"; but gave up when it came to KernelPageSize > and MMUPageSize, let someone else clarify those later. > > > [PATCH v3] Document the new Anonymous field in smaps. > > From: Nikanth Karthikesan <knikanth@xxxxxxx> > > Document the new Anonymous field in smaps, and also the Swap field. > Explain what smaps means by shared and private, which differs from > MAP_SHARED and MAP_PRIVATE. > > Signed-off-by: Nikanth Karthikesan <knikanth@xxxxxxx> > Signed-off-by: Hugh Dickins <hughd@xxxxxxxxxx> Looks good, Acked-by: Matt Mackall <mpm@xxxxxxxxxxx> > --- > > Documentation/filesystems/proc.txt | 15 +++++++++++---- > 1 file changed, 11 insertions(+), 4 deletions(-) > > --- a/Documentation/filesystems/proc.txt > +++ b/Documentation/filesystems/proc.txt > @@ -370,17 +370,24 @@ Shared_Dirty: 0 kB > Private_Clean: 0 kB > Private_Dirty: 0 kB > Referenced: 892 kB > +Anonymous: 0 kB > Swap: 0 kB > KernelPageSize: 4 kB > MMUPageSize: 4 kB > > -The first of these lines shows the same information as is displayed for the > -mapping in /proc/PID/maps. The remaining lines show the size of the mapping, > +The first of these lines shows the same information as is displayed for the > +mapping in /proc/PID/maps. The remaining lines show the size of the mapping, > the amount of the mapping that is currently resident in RAM, the "proportional > set sizeâ (divide each shared page by the number of processes sharing it), the > number of clean and dirty shared pages in the mapping, and the number of clean > -and dirty private pages in the mapping. The "Referenced" indicates the amount > -of memory currently marked as referenced or accessed. > +and dirty private pages in the mapping. Note that even a page which is part of > +a MAP_SHARED mapping, but has only a single pte mapped, i.e. is currently used > +by only one process, is accounted as private and not as shared. "Referenced" > +indicates the amount of memory currently marked as referenced or accessed. > +"Anonymous" shows the amount of memory that does not belong to any file. Even > +a mapping associated with a file may contain anonymous pages: when MAP_PRIVATE > +and a page is modified, the file page is replaced by a private anonymous copy. > +"Swap" shows how much would-be-anonymous memory is also used, but out on swap. > > This file is only present if the CONFIG_MMU kernel configuration option is > enabled. -- Mathematics is the supreme nostalgia of our time. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>