From 2ace36f0f55777be8a871c370832527e1cd54b15 Mon Sep 17 00:00:00 2001 From: Kefeng Wang Date: Tue, 9 Aug 2022 19:18:13 +0800 Subject: [PATCH] mm: memory-failure: cleanup try_to_split_thp_page() Since commit 5d1fd5dc877b ("mm,hwpoison: introduce MF_MSG_UNSPLIT_THP"), the action_result(,MF_MSG_UNSPLIT_THP,) called to show memory error event in memory_failure(), so the pr_info() in try_to_split_thp_page() is only needed in soft_offline_in_use_page(). Meanwhile this could also fix the unexpected prefix for "thp split failed" due to commit 96f96763de26 ("mm: memory-failure: convert to pr_fmt()"). Link: https://lkml.kernel.org/r/20220809111813.139690-1-wangkefeng.wang@huawei.com Signed-off-by: Kefeng Wang Acked-by: Naoya Horiguchi Cc: Miaohe Lin Signed-off-by: Andrew Morton --- mm/memory-failure.c | 25 +++++++++++++------------ 1 file changed, 13 insertions(+), 12 deletions(-) diff --git a/mm/memory-failure.c b/mm/memory-failure.c index 14439806b5ef..0dfed9d7b273 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -1524,20 +1524,18 @@ static int identify_page_state(unsigned long pfn, struct page *p, return page_action(ps, p, pfn); } -static int try_to_split_thp_page(struct page *page, const char *msg) +static int try_to_split_thp_page(struct page *page) { - lock_page(page); - if (unlikely(split_huge_page(page))) { - unsigned long pfn = page_to_pfn(page); + int ret; - unlock_page(page); - pr_info("%s: %#lx: thp split failed\n", msg, pfn); - put_page(page); - return -EBUSY; - } + lock_page(page); + ret = split_huge_page(page); unlock_page(page); - return 0; + if (unlikely(ret)) + put_page(page); + + return ret; } static void unmap_and_kill(struct list_head *to_kill, unsigned long pfn, @@ -2079,7 +2077,7 @@ try_again: * page is a valid handlable page. */ SetPageHasHWPoisoned(hpage); - if (try_to_split_thp_page(p, "Memory Failure") < 0) { + if (try_to_split_thp_page(p) < 0) { action_result(pfn, MF_MSG_UNSPLIT_THP, MF_IGNORED); res = -EBUSY; goto unlock_mutex; @@ -2505,8 +2503,11 @@ static int soft_offline_in_use_page(struct page *page) struct page *hpage = compound_head(page); if (!PageHuge(page) && PageTransHuge(hpage)) - if (try_to_split_thp_page(page, "soft offline") < 0) + if (try_to_split_thp_page(page) < 0) { + pr_info("soft offline: %#lx: thp split failed\n", + page_to_pfn(page)); return -EBUSY; + } return __soft_offline_page(page); }