Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753850AbdCMPsl (ORCPT ); Mon, 13 Mar 2017 11:48:41 -0400 Received: from out1-smtp.messagingengine.com ([66.111.4.25]:36315 "EHLO out1-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752355AbdCMPq3 (ORCPT ); Mon, 13 Mar 2017 11:46:29 -0400 X-ME-Sender: X-Sasl-enc: KVaXQSUS8tHR46Yz1a7/O2kYS5lgHnvumJ4BDcHAEWX2 1489419977 From: Zi Yan To: linux-kernel@vger.kernel.org, linux-mm@kvack.org Cc: kirill.shutemov@linux.intel.com, akpm@linux-foundation.org, minchan@kernel.org, vbabka@suse.cz, mgorman@techsingularity.net, mhocko@kernel.org, n-horiguchi@ah.jp.nec.com, khandual@linux.vnet.ibm.com, zi.yan@cs.rutgers.edu, dnellans@nvidia.com Subject: [PATCH v4 08/11] mm: hwpoison: soft offline supports thp migration Date: Mon, 13 Mar 2017 11:45:04 -0400 Message-Id: <20170313154507.3647-9-zi.yan@sent.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170313154507.3647-1-zi.yan@sent.com> References: <20170313154507.3647-1-zi.yan@sent.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1867 Lines: 64 From: Naoya Horiguchi This patch enables thp migration for soft offline. Signed-off-by: Naoya Horiguchi --- mm/memory-failure.c | 31 ++++++++++++------------------- 1 file changed, 12 insertions(+), 19 deletions(-) diff --git a/mm/memory-failure.c b/mm/memory-failure.c index b78d08016254..4c9f124c95c8 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -1483,7 +1483,17 @@ static struct page *new_page(struct page *p, unsigned long private, int **x) if (PageHuge(p)) return alloc_huge_page_node(page_hstate(compound_head(p)), nid); - else + else if (thp_migration_supported() && PageTransHuge(p)) { + struct page *thp; + + thp = alloc_pages_node(nid, + (GFP_TRANSHUGE | __GFP_THISNODE) & ~__GFP_RECLAIM, + HPAGE_PMD_ORDER); + if (!thp) + return NULL; + prep_transhuge_page(thp); + return thp; + } else return __alloc_pages_node(nid, GFP_HIGHUSER_MOVABLE, 0); } @@ -1691,28 +1701,11 @@ static int __soft_offline_page(struct page *page, int flags) static int soft_offline_in_use_page(struct page *page, int flags) { int ret; - struct page *hpage = compound_head(page); - - if (!PageHuge(page) && PageTransHuge(hpage)) { - lock_page(hpage); - if (!PageAnon(hpage) || unlikely(split_huge_page(hpage))) { - unlock_page(hpage); - if (!PageAnon(hpage)) - pr_info("soft offline: %#lx: non anonymous thp\n", page_to_pfn(page)); - else - pr_info("soft offline: %#lx: thp split failed\n", page_to_pfn(page)); - put_hwpoison_page(hpage); - return -EBUSY; - } - unlock_page(hpage); - get_hwpoison_page(page); - put_hwpoison_page(hpage); - } if (PageHuge(page)) ret = soft_offline_huge_page(page, flags); else - ret = __soft_offline_page(page, flags); + ret = __soft_offline_page(compound_head(page), flags); return ret; } -- 2.11.0