Commit Graph

1 Commits

Author SHA1 Message Date
Kazuhito Hagio
15f6d2627f makedumpfile: Increase SECTION_MAP_LAST_BIT to 4
Backport from the makedumpfile devel branch in upstream.

commit 7bdb468c2c99dd780c9a5321f93c79cbfdce2527
Author: Kazuhito Hagio <k-hagio@ab.jp.nec.com>
Date:   Tue Jul 23 12:24:47 2019 -0400

    [PATCH] Increase SECTION_MAP_LAST_BIT to 4

    kernel commit 326e1b8f83a4 ("mm/sparsemem: introduce a SECTION_IS_EARLY
    flag") added the flag to mem_section->section_mem_map value, and it caused
    makedumpfile an error like the following:

      readmem: Can't convert a virtual address(fffffc97d1000000) to physical address.
      readmem: type_addr: 0, addr:fffffc97d1000000, size:32768
      __exclude_unnecessary_pages: Can't read the buffer of struct page.
      create_2nd_bitmap: Can't exclude unnecessary pages.

    To fix this, SECTION_MAP_LAST_BIT needs to be updated. The bit has not
    been used until the addition, so we can just increase the value.

    Signed-off-by: Kazuhito Hagio <k-hagio@ab.jp.nec.com>

Signed-off-by: Kazuhito Hagio <k-hagio@ab.jp.nec.com>
Acked-by: Dave Young <dyoung@redhat.com>
Acked-by: Kairui Song <kasong@redhat.com>
2019-08-06 11:15:14 +08:00