[lkml]   [2006]   [Nov]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    Patch in this message
    Subject[PATCH] x86_64: Fix partial page check to ensure unusable memory is not being marked usable.
    Fix partial page check in e820_register_active_regions to ensure
    partial pages are
    not being marked as active in the memory pool.

    Signed-off-by: Aaron Durbin <>

    This was causing a machine to reboot w/ an area in the e820 that was less
    than the page size because the upper address was being use to mark a hole as
    active in the memory pool.

    arch/x86_64/kernel/e820.c | 2 +-
    1 files changed, 1 insertions(+), 1 deletions(-)

    diff --git a/arch/x86_64/kernel/e820.c b/arch/x86_64/kernel/e820.c
    index a75c829..855b561 100644
    --- a/arch/x86_64/kernel/e820.c
    +++ b/arch/x86_64/kernel/e820.c
    @@ -278,7 +278,7 @@ e820_register_active_regions(int nid, un
    >> PAGE_SHIFT;

    /* Skip map entries smaller than a page */
    - if (ei_startpfn > ei_endpfn)
    + if (ei_startpfn >= ei_endpfn)

    /* Check if end_pfn_map should be updated */
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to
    More majordomo info at
    Please read the FAQ at
     \ /
      Last update: 2006-11-09 22:31    [W:0.019 / U:14.952 seconds]
    ©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site