From e240ac52f7da5986f9dcbe29d423b7b2f141b41b Mon Sep 17 00:00:00 2001 From: zhenwei pi Date: Thu, 12 May 2022 20:23:10 -0700 Subject: [PATCH] mm/memory-failure.c: simplify num_poisoned_pages_inc/dec Originally, do num_poisoned_pages_inc() in memory failure routine, use num_poisoned_pages_dec() to rollback the number if filtered/ cancelled. Suggested by Naoya, do num_poisoned_pages_inc() only in action_result(), this make this clear and simple. Link: https://lkml.kernel.org/r/20220509105641.491313-6-pizhenwei@bytedance.com Signed-off-by: zhenwei pi Acked-by: Naoya Horiguchi Signed-off-by: Andrew Morton --- mm/memory-failure.c | 11 +++-------- 1 file changed, 3 insertions(+), 8 deletions(-) diff --git a/mm/memory-failure.c b/mm/memory-failure.c index 7ee8035..01f8b63 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -1132,6 +1132,7 @@ static void action_result(unsigned long pfn, enum mf_action_page_type type, { trace_memory_failure_event(pfn, type, result); + num_poisoned_pages_inc(); pr_err("Memory failure: %#lx: recovery action for %s: %s\n", pfn, action_page_types[type], action_name[result]); } @@ -1587,8 +1588,6 @@ retry: goto out; } - num_poisoned_pages_inc(); - /* * Handling free hugepage. The possible race with hugepage allocation * or demotion can be prevented by PageHWPoison flag. @@ -1806,7 +1805,6 @@ try_again: } hpage = compound_head(p); - num_poisoned_pages_inc(); /* * We need/can do nothing about count=0 pages. @@ -1830,7 +1828,6 @@ try_again: /* We lost the race, try again */ if (retry) { ClearPageHWPoison(p); - num_poisoned_pages_dec(); retry = false; goto try_again; } @@ -1906,8 +1903,7 @@ try_again: */ if (PageCompound(p)) { if (retry) { - if (TestClearPageHWPoison(p)) - num_poisoned_pages_dec(); + ClearPageHWPoison(p); unlock_page(p); put_page(p); flags &= ~MF_COUNT_INCREASED; @@ -1929,8 +1925,7 @@ try_again: page_flags = p->flags; if (hwpoison_filter(p)) { - if (TestClearPageHWPoison(p)) - num_poisoned_pages_dec(); + TestClearPageHWPoison(p); unlock_page(p); put_page(p); res = -EOPNOTSUPP; -- 2.7.4