1. 12 Mar, 2008 1 commit
    • Rafael J. Wysocki's avatar
      Hibernation: Fix mark_nosave_pages() · a82f7119
      Rafael J. Wysocki authored
      There is a problem in the hibernation code that triggers on some NUMA
      systems on which pfn_valid() returns 'true' for some PFNs that don't
      belong to any zone.  Namely, there is a BUG_ON() in
      memory_bm_find_bit() that triggers for PFNs not belonging to any
      zone and passing the pfn_valid() test.  On the affected systems it
      triggers when we mark PFNs reported by the platform as not saveable,
      because the PFNs in question belong to a region mapped directly using
      iorepam() (i.e. the ACPI data area) and they pass the pfn_valid()
      test.
      
      Modify memory_bm_find_bit() so that it returns an error if given PFN
      doesn't belong to any zone instead of crashing the kernel and ignore
      the result returned by it in mark_nosave_pages(), while marking the
      "nosave" memory regions.
      
      This doesn't affect the hibernation functionality, as we won't touch
      the PFNs in question anyway.
      
      http://bugzilla.kernel.org/show_bug.cgi?id=9966 .
      Signed-off-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      a82f7119
  2. 11 Mar, 2008 39 commits