• W
    HWPOISON: add page flags filter · 478c5ffc
    Wu Fengguang 提交于
    When specified, only poison pages if ((page_flags & mask) == value).
    
    -       corrupt-filter-flags-mask
    -       corrupt-filter-flags-value
    
    This allows stress testing of many kinds of pages.
    
    Strictly speaking, the buddy pages requires taking zone lock, to avoid
    setting PG_hwpoison on a "was buddy but now allocated to someone" page.
    However we can just do nothing because we set PG_locked in the beginning,
    this prevents the page allocator from allocating it to someone. (It will
    BUG() on the unexpected PG_locked, which is fine for hwpoison testing.)
    
    [AK: Add select PROC_PAGE_MONITOR to satisfy dependency]
    
    CC: Nick Piggin <npiggin@suse.de>
    Signed-off-by: NWu Fengguang <fengguang.wu@intel.com>
    Signed-off-by: NAndi Kleen <ak@linux.intel.com>
    478c5ffc
internal.h 7.0 KB