• Mel Gorman's avatar
    [PATCH] mm: use symbolic names instead of indices for zone initialisation · 6391af17
    Mel Gorman authored
    Arch-independent zone-sizing is using indices instead of symbolic names to
    offset within an array related to zones (max_zone_pfns).  The unintended
    impact is that ZONE_DMA and ZONE_NORMAL is initialised on powerpc instead
    of ZONE_DMA and ZONE_HIGHMEM when CONFIG_HIGHMEM is set.  As a result, the
    the machine fails to boot but will boot with CONFIG_HIGHMEM turned off.
    
    The following patch properly initialises the max_zone_pfns[] array and uses
    symbolic names instead of indices in each architecture using
    arch-independent zone-sizing.  Two users have successfully booted their
    powerpcs with it (one an ibook G4).  It has also been boot tested on x86,
    x86_64, ppc64 and ia64.  Please merge for 2.6.19-rc2.
    
    Credit to Benjamin Herrenschmidt for identifying the bug and rolling the
    first fix.  Additional credit to Johannes Berg and Andreas Schwab for
    reporting the problem and testing on powerpc.
    Signed-off-by: default avatarMel Gorman <mel@csn.ul.ie>
    Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
    Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
    6391af17
numa.c 16.7 KB