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author | Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> | 2013-09-11 14:22:03 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-11 15:57:48 -0700 |
commit | e2d8cf405525d83e6ca42969be460f94b0339798 (patch) | |
tree | bf36312ef5b29802dcca7e0849596a128042b0db /mm/migrate.c | |
parent | b8ec1cee5a4375c1244b85709138a2eac2d89cb6 (diff) | |
download | linux-e2d8cf405525d83e6ca42969be460f94b0339798.tar.bz2 |
migrate: add hugepage migration code to migrate_pages()
Extend check_range() to handle vma with VM_HUGETLB set. We will be able
to migrate hugepage with migrate_pages(2) after applying the enablement
patch which comes later in this series.
Note that for larger hugepages (covered by pud entries, 1GB for x86_64 for
example), we simply skip it now.
Note that using pmd_huge/pud_huge assumes that hugepages are pointed to by
pmd/pud. This is not true in some architectures implementing hugepage
with other mechanisms like ia64, but it's OK because pmd_huge/pud_huge
simply return 0 in such arch and page walker simply ignores such
hugepages.
Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Acked-by: Andi Kleen <ak@linux.intel.com>
Reviewed-by: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Acked-by: Hillf Danton <dhillf@gmail.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Hugh Dickins <hughd@google.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Rik van Riel <riel@redhat.com>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/migrate.c')
0 files changed, 0 insertions, 0 deletions