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    SubjectRe: [PATCH] processes with shared vm
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    Den 17 Aug 2001 03:56:49 -0400, skrev Robert Love:
    > On 17 Aug 2001 09:50:06 +0200, Terje Eggestad wrote:
    > > I figured out that it's difficult to find out from /proc
    > > which processes that share VM (created with clone(CLONE_VM)).
    >
    > good idea, but use diff -u
    >
    > --
    > Robert M. Love
    > rml at ufl.edu
    > rml at tech9.net


    --- array.c Thu Aug 16 16:33:56 2001
    +++ array.c.orig Mon Mar 19 21:34:55 2001
    @@ -50,12 +50,6 @@
    * Al Viro & Jeff Garzik : moved most of the thing into base.c and
    * : proc_misc.c. The rest may eventually go into
    * : base.c too.
    - *
    - * Terje Eggestad : added in /proc/<pid>/status a VmClones: n
    - * : that tells how many proc that uses the same VM
    (mm_struct).
    - * : if there are clones add another field
    VmFirstClone with the
    - * : clone with the lowest pid. Needed for things
    like gtop that adds
    - * : mem usage of groups of proc, or else they add
    up the usage of threads.
    */

    #include <linux/config.h>
    @@ -184,7 +178,7 @@
    static inline char * task_mem(struct mm_struct *mm, char *buffer)
    {
    struct vm_area_struct * vma;
    - unsigned long data = 0, stack = 0;
    + unsigned long data = 0, stack = 0;
    unsigned long exec = 0, lib = 0;

    down_read(&mm->mmap_sem);
    @@ -212,24 +206,12 @@
    "VmData:\t%8lu kB\n"
    "VmStk:\t%8lu kB\n"
    "VmExe:\t%8lu kB\n"
    - "VmLib:\t%8lu kB\n"
    - "VmClones:\t%d\n",
    + "VmLib:\t%8lu kB\n",
    mm->total_vm << (PAGE_SHIFT-10),
    mm->locked_vm << (PAGE_SHIFT-10),
    mm->rss << (PAGE_SHIFT-10),
    data - stack, stack,
    - exec - lib, lib,
    - mm->mm_users.counter-2);
    - /* if we've vm clones, find the lowest/first pid of the clones
    */
    - if (mm->mm_users.counter > 2) {
    - struct task_struct *p;
    - read_lock(&tasklist_lock);
    - for_each_task(p) {
    - if (p->mm == mm) break;
    - };
    - buffer += sprintf(buffer, "VmFirstClone:\t%d\n", p->pid);
    - read_unlock(&tasklist_lock);
    - };
    + exec - lib, lib);
    up_read(&mm->mmap_sem);
    return buffer;
    }

    --
    _________________________________________________________________________
    Terje Eggestad terje.eggestad@scali.no
    Scali Scalable Linux Systems http://www.scali.com

    Olaf Helsets Vei 6 tel: +47 22 62 89 61 (OFFICE)
    P.O.Box 70 Bogerud +47 975 31 574 (MOBILE)
    N-0621 Oslo fax: +47 22 62 89 51
    NORWAY
    _________________________________________________________________________--- array.c Thu Aug 16 16:33:56 2001
    +++ array.c.orig Mon Mar 19 21:34:55 2001
    @@ -50,12 +50,6 @@
    * Al Viro & Jeff Garzik : moved most of the thing into base.c and
    * : proc_misc.c. The rest may eventually go into
    * : base.c too.
    - *
    - * Terje Eggestad : added in /proc/<pid>/status a VmClones: n
    - * : that tells how many proc that uses the same VM (mm_struct).
    - * : if there are clones add another field VmFirstClone with the
    - * : clone with the lowest pid. Needed for things like gtop that adds
    - * : mem usage of groups of proc, or else they add up the usage of threads.
    */

    #include <linux/config.h>
    @@ -184,7 +178,7 @@
    static inline char * task_mem(struct mm_struct *mm, char *buffer)
    {
    struct vm_area_struct * vma;
    - unsigned long data = 0, stack = 0;
    + unsigned long data = 0, stack = 0;
    unsigned long exec = 0, lib = 0;

    down_read(&mm->mmap_sem);
    @@ -212,24 +206,12 @@
    "VmData:\t%8lu kB\n"
    "VmStk:\t%8lu kB\n"
    "VmExe:\t%8lu kB\n"
    - "VmLib:\t%8lu kB\n"
    - "VmClones:\t%d\n",
    + "VmLib:\t%8lu kB\n",
    mm->total_vm << (PAGE_SHIFT-10),
    mm->locked_vm << (PAGE_SHIFT-10),
    mm->rss << (PAGE_SHIFT-10),
    data - stack, stack,
    - exec - lib, lib,
    - mm->mm_users.counter-2);
    - /* if we've vm clones, find the lowest/first pid of the clones */
    - if (mm->mm_users.counter > 2) {
    - struct task_struct *p;
    - read_lock(&tasklist_lock);
    - for_each_task(p) {
    - if (p->mm == mm) break;
    - };
    - buffer += sprintf(buffer, "VmFirstClone:\t%d\n", p->pid);
    - read_unlock(&tasklist_lock);
    - };
    + exec - lib, lib);
    up_read(&mm->mmap_sem);
    return buffer;
    }
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