From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx166.postini.com [74.125.245.166]) by kanga.kvack.org (Postfix) with SMTP id 965B46B00C6 for ; Wed, 3 Oct 2012 19:51:56 -0400 (EDT) From: Andrea Arcangeli Subject: [PATCH 23/33] autonuma: retain page last_nid information in khugepaged Date: Thu, 4 Oct 2012 01:51:05 +0200 Message-Id: <1349308275-2174-24-git-send-email-aarcange@redhat.com> In-Reply-To: <1349308275-2174-1-git-send-email-aarcange@redhat.com> References: <1349308275-2174-1-git-send-email-aarcange@redhat.com> Sender: owner-linux-mm@kvack.org List-ID: To: linux-kernel@vger.kernel.org, linux-mm@kvack.org Cc: Linus Torvalds , Andrew Morton , Peter Zijlstra , Ingo Molnar , Mel Gorman , Hugh Dickins , Rik van Riel , Johannes Weiner , Hillf Danton , Andrew Jones , Dan Smith , Thomas Gleixner , Paul Turner , Christoph Lameter , Suresh Siddha , Mike Galbraith , "Paul E. McKenney" , Lai Jiangshan , Bharata B Rao , Lee Schermerhorn , Srivatsa Vaddagiri , Alex Shi , Mauricio Faria de Oliveira , Konrad Rzeszutek Wilk , Don Morris , Benjamin Herrenschmidt When pages are collapsed try to keep the last_nid information from one of the original pages. Signed-off-by: Andrea Arcangeli --- 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 1023e67..78b2851 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -1846,6 +1846,9 @@ 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; @@ -1855,6 +1858,17 @@ 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); release_pte_page(src_page); -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org