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    Subject[PATCH] rmap 30 fix bad mapcount
    From: Andrea Arcangeli <andrea@suse.de>

    page_alloc.c's bad_page routine should reset a bad mapcount; and it's
    more revealing to show the bad mapcount than just the boolean mapped.

    page_alloc.c | 5 +++--
    1 files changed, 3 insertions(+), 2 deletions(-)

    --- rmap29/mm/page_alloc.c 2004-05-05 13:29:08.000000000 +0100
    +++ rmap30/mm/page_alloc.c 2004-05-08 20:55:38.593511352 +0100
    @@ -73,9 +73,9 @@ static void bad_page(const char *functio
    {
    printk(KERN_EMERG "Bad page state at %s (in process '%s', page %p)\n",
    function, current->comm, page);
    - printk(KERN_EMERG "flags:0x%08lx mapping:%p mapped:%d count:%d\n",
    + printk(KERN_EMERG "flags:0x%08lx mapping:%p mapcount:%d count:%d\n",
    (unsigned long)page->flags, page->mapping,
    - page_mapped(page), page_count(page));
    + (int)page->mapcount, page_count(page));
    printk(KERN_EMERG "Backtrace:\n");
    dump_stack();
    printk(KERN_EMERG "Trying to fix it up, but a reboot is needed\n");
    @@ -90,6 +90,7 @@ static void bad_page(const char *functio
    1 << PG_writeback);
    set_page_count(page, 0);
    page->mapping = NULL;
    + page->mapcount = 0;
    }

    #ifndef CONFIG_HUGETLB_PAGE
    -
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