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Date: Fri, 27 Feb 2015 11:38:47 +0100
From: Michael Kerrisk <mtk.manpages@...il.com>
To: Vlastimil Babka <vbabka@...e.cz>
Cc: linux-mm <linux-mm@...ck.org>,
Jerome Marchand <jmarchan@...hat.com>,
Linux Kernel <linux-kernel@...r.kernel.org>,
Andrew Morton <akpm@...ux-foundation.org>,
linux-doc <linux-doc@...r.kernel.org>,
Hugh Dickins <hughd@...gle.com>, Michal Hocko <mhocko@...e.cz>,
"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
Cyrill Gorcunov <gorcunov@...nvz.org>,
Randy Dunlap <rdunlap@...radead.org>,
linux-s390 <linux-s390@...r.kernel.org>,
Martin Schwidefsky <schwidefsky@...ibm.com>,
Heiko Carstens <heiko.carstens@...ibm.com>,
Peter Zijlstra <peterz@...radead.org>,
Paul Mackerras <paulus@...ba.org>,
Arnaldo Carvalho de Melo <acme@...nel.org>,
Oleg Nesterov <oleg@...hat.com>,
Linux API <linux-api@...r.kernel.org>
Subject: Re: [PATCH 4/4] mm, procfs: Display VmAnon, VmFile and VmShm in /proc/pid/status
[CC += linux-api@]
On Thu, Feb 26, 2015 at 2:51 PM, Vlastimil Babka <vbabka@...e.cz> wrote:
> From: Jerome Marchand <jmarchan@...hat.com>
>
> It's currently inconvenient to retrieve MM_ANONPAGES value from status
> and statm files and there is no way to separate MM_FILEPAGES and
> MM_SHMEMPAGES. Add VmAnon, VmFile and VmShm lines in /proc/<pid>/status
> to solve these issues.
>
> Signed-off-by: Jerome Marchand <jmarchan@...hat.com>
> Signed-off-by: Vlastimil Babka <vbabka@...e.cz>
> ---
> Documentation/filesystems/proc.txt | 10 +++++++++-
> fs/proc/task_mmu.c | 13 +++++++++++--
> 2 files changed, 20 insertions(+), 3 deletions(-)
>
> diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt
> index 8b30543..c777adb 100644
> --- a/Documentation/filesystems/proc.txt
> +++ b/Documentation/filesystems/proc.txt
> @@ -168,6 +168,9 @@ read the file /proc/PID/status:
> VmLck: 0 kB
> VmHWM: 476 kB
> VmRSS: 476 kB
> + VmAnon: 352 kB
> + VmFile: 120 kB
> + VmShm: 4 kB
> VmData: 156 kB
> VmStk: 88 kB
> VmExe: 68 kB
> @@ -224,7 +227,12 @@ Table 1-2: Contents of the status files (as of 2.6.30-rc7)
> VmSize total program size
> VmLck locked memory size
> VmHWM peak resident set size ("high water mark")
> - VmRSS size of memory portions
> + VmRSS size of memory portions. It contains the three
> + following parts (VmRSS = VmAnon + VmFile + VmShm)
> + VmAnon size of resident anonymous memory
> + VmFile size of resident file mappings
> + VmShm size of resident shmem memory (includes SysV shm,
> + mapping of tmpfs and shared anonymous mappings)
> VmData size of data, stack, and text segments
> VmStk size of data, stack, and text segments
> VmExe size of text segment
> diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
> index d70334c..a77a3ac 100644
> --- a/fs/proc/task_mmu.c
> +++ b/fs/proc/task_mmu.c
> @@ -22,7 +22,7 @@
>
> void task_mem(struct seq_file *m, struct mm_struct *mm)
> {
> - unsigned long data, text, lib, swap, ptes, pmds;
> + unsigned long data, text, lib, swap, ptes, pmds, anon, file, shmem;
> unsigned long hiwater_vm, total_vm, hiwater_rss, total_rss;
>
> /*
> @@ -39,6 +39,9 @@ void task_mem(struct seq_file *m, struct mm_struct *mm)
> if (hiwater_rss < mm->hiwater_rss)
> hiwater_rss = mm->hiwater_rss;
>
> + anon = get_mm_counter(mm, MM_ANONPAGES);
> + file = get_mm_counter(mm, MM_FILEPAGES);
> + shmem = get_mm_counter_shmem(mm);
> data = mm->total_vm - mm->shared_vm - mm->stack_vm;
> text = (PAGE_ALIGN(mm->end_code) - (mm->start_code & PAGE_MASK)) >> 10;
> lib = (mm->exec_vm << (PAGE_SHIFT-10)) - text;
> @@ -52,6 +55,9 @@ void task_mem(struct seq_file *m, struct mm_struct *mm)
> "VmPin:\t%8lu kB\n"
> "VmHWM:\t%8lu kB\n"
> "VmRSS:\t%8lu kB\n"
> + "VmAnon:\t%8lu kB\n"
> + "VmFile:\t%8lu kB\n"
> + "VmShm:\t%8lu kB\n"
> "VmData:\t%8lu kB\n"
> "VmStk:\t%8lu kB\n"
> "VmExe:\t%8lu kB\n"
> @@ -65,6 +71,9 @@ void task_mem(struct seq_file *m, struct mm_struct *mm)
> mm->pinned_vm << (PAGE_SHIFT-10),
> hiwater_rss << (PAGE_SHIFT-10),
> total_rss << (PAGE_SHIFT-10),
> + anon << (PAGE_SHIFT-10),
> + file << (PAGE_SHIFT-10),
> + shmem << (PAGE_SHIFT-10),
> data << (PAGE_SHIFT-10),
> mm->stack_vm << (PAGE_SHIFT-10), text, lib,
> ptes >> 10,
> @@ -82,7 +91,7 @@ unsigned long task_statm(struct mm_struct *mm,
> unsigned long *data, unsigned long *resident)
> {
> *shared = get_mm_counter(mm, MM_FILEPAGES) +
> - get_mm_counter(mm, MM_SHMEMPAGES);
> + get_mm_counter_shmem(mm);
> *text = (PAGE_ALIGN(mm->end_code) - (mm->start_code & PAGE_MASK))
> >> PAGE_SHIFT;
> *data = mm->total_vm - mm->shared_vm;
> --
> 2.1.4
>
> --
> To unsubscribe, send a message with 'unsubscribe linux-mm' in
> the body to majordomo@...ck.org. For more info on Linux MM,
> see: http://www.linux-mm.org/ .
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--
Michael Kerrisk Linux man-pages maintainer;
http://www.kernel.org/doc/man-pages/
Author of "The Linux Programming Interface", http://blog.man7.org/
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