From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf1-f199.google.com (mail-pf1-f199.google.com [209.85.210.199]) by kanga.kvack.org (Postfix) with ESMTP id 897486B069E for ; Fri, 9 Nov 2018 01:47:44 -0500 (EST) Received: by mail-pf1-f199.google.com with SMTP id b88-v6so789332pfj.4 for ; Thu, 08 Nov 2018 22:47:44 -0800 (PST) Received: from mail-sor-f65.google.com (mail-sor-f65.google.com. [209.85.220.65]) by mx.google.com with SMTPS id q73-v6sor6655314pfi.33.2018.11.08.22.47.42 for (Google Transport Security); Thu, 08 Nov 2018 22:47:43 -0800 (PST) From: Naoya Horiguchi Subject: [RFC][PATCH v1 06/11] mm: hwpoison: remove MF_COUNT_INCREASED Date: Fri, 9 Nov 2018 15:47:10 +0900 Message-Id: <1541746035-13408-7-git-send-email-n-horiguchi@ah.jp.nec.com> In-Reply-To: <1541746035-13408-1-git-send-email-n-horiguchi@ah.jp.nec.com> References: <1541746035-13408-1-git-send-email-n-horiguchi@ah.jp.nec.com> Sender: owner-linux-mm@kvack.org List-ID: To: linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: Michal Hocko , Andrew Morton , Mike Kravetz , xishi.qiuxishi@alibaba-inc.com, Laurent Dufour Now there's no user of MF_COUNT_INCREASED, so we can safely remove all calling points. Signed-off-by: Naoya Horiguchi --- include/linux/mm.h | 7 +++---- mm/memory-failure.c | 16 +++------------- 2 files changed, 6 insertions(+), 17 deletions(-) diff --git v4.19-mmotm-2018-10-30-16-08/include/linux/mm.h v4.19-mmotm-2018-10-30-16-08_patched/include/linux/mm.h index 22623ba..f85b450 100644 --- v4.19-mmotm-2018-10-30-16-08/include/linux/mm.h +++ v4.19-mmotm-2018-10-30-16-08_patched/include/linux/mm.h @@ -2725,10 +2725,9 @@ void register_page_bootmem_memmap(unsigned long section_nr, struct page *map, unsigned long nr_pages); enum mf_flags { - MF_COUNT_INCREASED = 1 << 0, - MF_ACTION_REQUIRED = 1 << 1, - MF_MUST_KILL = 1 << 2, - MF_SOFT_OFFLINE = 1 << 3, + MF_ACTION_REQUIRED = 1 << 0, + MF_MUST_KILL = 1 << 1, + MF_SOFT_OFFLINE = 1 << 2, }; extern int memory_failure(unsigned long pfn, int flags); extern void memory_failure_queue(unsigned long pfn, int flags); diff --git v4.19-mmotm-2018-10-30-16-08/mm/memory-failure.c v4.19-mmotm-2018-10-30-16-08_patched/mm/memory-failure.c index 11e283e..ed347f8 100644 --- v4.19-mmotm-2018-10-30-16-08/mm/memory-failure.c +++ v4.19-mmotm-2018-10-30-16-08_patched/mm/memory-failure.c @@ -1094,7 +1094,7 @@ static int memory_failure_hugetlb(unsigned long pfn, int flags) num_poisoned_pages_inc(); - if (!(flags & MF_COUNT_INCREASED) && !get_hwpoison_page(p)) { + if (!get_hwpoison_page(p)) { /* * Check "filter hit" and "race with other subpage." */ @@ -1290,7 +1290,7 @@ int memory_failure(unsigned long pfn, int flags) * In fact it's dangerous to directly bump up page count from 0, * that may make page_ref_freeze()/page_ref_unfreeze() mismatch. */ - if (!(flags & MF_COUNT_INCREASED) && !get_hwpoison_page(p)) { + if (!get_hwpoison_page(p)) { if (is_free_buddy_page(p)) { action_result(pfn, MF_MSG_BUDDY, MF_DELAYED); return 0; @@ -1331,10 +1331,7 @@ int memory_failure(unsigned long pfn, int flags) shake_page(p, 0); /* shake_page could have turned it free. */ if (!PageLRU(p) && is_free_buddy_page(p)) { - if (flags & MF_COUNT_INCREASED) - action_result(pfn, MF_MSG_BUDDY, MF_DELAYED); - else - action_result(pfn, MF_MSG_BUDDY_2ND, MF_DELAYED); + action_result(pfn, MF_MSG_BUDDY_2ND, MF_DELAYED); return 0; } @@ -1622,9 +1619,6 @@ static int __get_any_page(struct page *p, unsigned long pfn, int flags) { int ret; - if (flags & MF_COUNT_INCREASED) - return 1; - /* * When the target page is a free hugepage, just remove it * from free hugepage list. @@ -1906,15 +1900,11 @@ int soft_offline_page(struct page *page, int flags) if (is_zone_device_page(page)) { pr_debug_ratelimited("soft_offline: %#lx page is device page\n", pfn); - if (flags & MF_COUNT_INCREASED) - put_page(page); return -EIO; } if (PageHWPoison(page)) { pr_info("soft offline: %#lx page already poisoned\n", pfn); - if (flags & MF_COUNT_INCREASED) - put_hwpoison_page(page); return -EBUSY; } -- 2.7.0