1. 30 Jan, 2016 2 commits
    • Dan Williams's avatar
      devm_memremap_pages: fix vmem_altmap lifetime + alignment handling · eb7d78c9
      Dan Williams authored
      to_vmem_altmap() needs to return valid results until
      arch_remove_memory() completes.  It also needs to be valid for any pfn
      in a section regardless of whether that pfn maps to data.  This escape
      was a result of a bug in the unit test.
      
      The signature of this bug is that free_pagetable() fails to retrieve a
      vmem_altmap and goes off into the weeds:
      
       BUG: unable to handle kernel NULL pointer dereference at           (null)
       IP: [<ffffffff811d2629>] get_pfnblock_flags_mask+0x49/0x60
       [..]
       Call Trace:
        [<ffffffff811d3477>] free_hot_cold_page+0x97/0x1d0
        [<ffffffff811d367a>] __free_pages+0x2a/0x40
        [<ffffffff8191e669>] free_pagetable+0x8c/0xd4
        [<ffffffff8191ef4e>] remove_pagetable+0x37a/0x808
        [<ffffffff8191b210>] vmemmap_free+0x10/0x20
      
      Fixes: 4b94ffdc ("x86, mm: introduce vmem_altmap to augment vmemmap_populate()")
      Cc: Andrew Morton <akpm@linux-foundation.org>
      Reported-by: default avatarJeff Moyer <jmoyer@redhat.com>
      Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
      eb7d78c9
    • Dan Williams's avatar
      libnvdimm, pfn: fix restoring memmap location · 45eb570a
      Dan Williams authored
      This path was missed when turning on the memmap in pmem support.  Permit
      'pmem' as a valid location for the map.
      Reported-by: default avatarJeff Moyer <jmoyer@redhat.com>
      Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
      45eb570a
  2. 26 Jan, 2016 1 commit
  3. 24 Jan, 2016 37 commits