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    SubjectRe: fix text reporting in O(1) proc_pid_statm()
    On Tue, Aug 24, 2004 at 07:06:56PM -0400, Albert Cahalan wrote:
    >> Back in the days of a.out, statm also contained lrs
    >> for libraries. ELF broke this.
    >> The statm VM size is supposed to count IO mappings.
    >> So if your X server maps 64 MB of video RAM, then
    >> the statm file should have a value 64 MB larger than
    >> the status file has.

    On Tue, Aug 24, 2004 at 04:12:36PM -0700, William Lee Irwin III wrote:
    > This would not be difficult to perform additional accounting for.
    > I'll follow up with that shortly.

    Account reserved memory properly as per acahalan's sepecified semantics.


    Index: mm4-2.6.8.1/fs/proc/task_mmu.c
    ===================================================================
    --- mm4-2.6.8.1.orig/fs/proc/task_mmu.c 2004-08-24 10:00:21.530755896 -0700
    +++ mm4-2.6.8.1/fs/proc/task_mmu.c 2004-08-24 16:14:48.802211472 -0700
    @@ -19,7 +19,7 @@
    "VmStk:\t%8lu kB\n"
    "VmExe:\t%8lu kB\n"
    "VmLib:\t%8lu kB\n",
    - mm->total_vm << (PAGE_SHIFT-10),
    + (mm->total_vm - mm->reserved_vm) << (PAGE_SHIFT-10),
    mm->locked_vm << (PAGE_SHIFT-10),
    mm->rss << (PAGE_SHIFT-10),
    data << (PAGE_SHIFT-10),
    Index: mm4-2.6.8.1/include/linux/sched.h
    ===================================================================
    --- mm4-2.6.8.1.orig/include/linux/sched.h 2004-08-23 18:29:33.000000000 -0700
    +++ mm4-2.6.8.1/include/linux/sched.h 2004-08-24 16:11:15.251676088 -0700
    @@ -226,7 +226,7 @@
    unsigned long start_brk, brk, start_stack;
    unsigned long arg_start, arg_end, env_start, env_end;
    unsigned long rlimit_rss, rss, total_vm, locked_vm, shared_vm;
    - unsigned long exec_vm, stack_vm, def_flags;
    + unsigned long exec_vm, stack_vm, reserved_vm, def_flags;

    unsigned long saved_auxv[40]; /* for /proc/PID/auxv */

    Index: mm4-2.6.8.1/mm/mmap.c
    ===================================================================
    --- mm4-2.6.8.1.orig/mm/mmap.c 2004-08-23 23:33:42.000000000 -0700
    +++ mm4-2.6.8.1/mm/mmap.c 2004-08-24 16:13:14.139602376 -0700
    @@ -749,6 +749,8 @@
    mm->stack_vm += pages;
    if (flags & VM_EXEC)
    mm->exec_vm += pages;
    + if (flags & (VM_RESERVED|VM_IO))
    + mm->reserved_vm += pages;
    }

    /*
    -
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