• Dave Hansen's avatar
    mm: print more details for bad_page() · f0b791a3
    Dave Hansen authored
    bad_page() is cool in that it prints out a bunch of data about the page.
    But, I can never remember which page flags are good and which are bad,
    or whether ->index or ->mapping is required to be NULL.
    This patch allows bad/dump_page() callers to specify a string about why
    they are dumping the page and adds explanation strings to a number of
    places.  It also adds a 'bad_flags' argument to bad_page(), which it
    then dumps out separately from the flags which are actually set.
    This way, the messages will show specifically why the page was bad,
    *specifically* which flags it is complaining about, if it was a page
    flag combination which was the problem.
    [akpm@linux-foundation.org: switch to pr_alert]
    Signed-off-by: default avatarDave Hansen <dave.hansen@linux.intel.com>
    Reviewed-by: default avatarChristoph Lameter <cl@linux.com>
    Cc: Andi Kleen <andi@firstfloor.org>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
page_alloc.c 181 KB