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    SubjectRe: deferred rss update instead of sloppy rss


    On Mon, 22 Nov 2004, Christoph Lameter wrote:
    >
    > The problem is then that the proc filesystem must do an extensive scan
    > over all threads to find users of a certain mm_struct.

    The alternative is to just add a simple list into the task_struct and the
    head of it into mm_struct. Then, at fork, you just finish the fork() with

    list_add(p->mm_list, p->mm->thread_list);

    and do the proper list_del() in exit_mm() or wherever.

    You'll still loop in /proc, but you'll do the minimal loop necessary.

    Linus
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