When pages are collapsed try to keep the last_nid information from one of the original pages.
Signed-off-by: Andrea Arcangeli <aarca...@redhat.com> --- mm/huge_memory.c | 14 ++++++++++++++ 1 files changed, 14 insertions(+), 0 deletions(-) diff --git a/mm/huge_memory.c b/mm/huge_memory.c index a65590f..0d2a12f 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -1829,6 +1829,9 @@ static bool __collapse_huge_page_copy(pte_t *pte, struct page *page, { pte_t *_pte; bool mknuma = false; +#ifdef CONFIG_AUTONUMA + int autonuma_last_nid = -1; +#endif for (_pte = pte; _pte < pte+HPAGE_PMD_NR; _pte++) { pte_t pteval = *_pte; struct page *src_page; @@ -1838,6 +1841,17 @@ static bool __collapse_huge_page_copy(pte_t *pte, struct page *page, add_mm_counter(vma->vm_mm, MM_ANONPAGES, 1); } else { src_page = pte_page(pteval); +#ifdef CONFIG_AUTONUMA + /* pick the first one, better than nothing */ + if (autonuma_last_nid < 0) { + autonuma_last_nid = + ACCESS_ONCE(src_page-> + autonuma_last_nid); + if (autonuma_last_nid >= 0) + ACCESS_ONCE(page->autonuma_last_nid) = + autonuma_last_nid; + } +#endif copy_user_highpage(page, src_page, address, vma); VM_BUG_ON(page_mapcount(src_page) != 1); VM_BUG_ON(page_count(src_page) != 0); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/