linux-kernel - [RFC PATCH 08/15] fs: proc: use PAGES_PER_SECTION for page offline checking period.

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Message-Id: <20210805190253.2795604-9-zi.yan@sent.com>
Date:   Thu,  5 Aug 2021 15:02:46 -0400
From:   Zi Yan <zi.yan@...t.com>
To:     David Hildenbrand <david@...hat.com>, linux-mm@...ck.org
Cc:     Matthew Wilcox <willy@...radead.org>,
        Vlastimil Babka <vbabka@...e.cz>,
        "Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>,
        Mike Kravetz <mike.kravetz@...cle.com>,
        Michal Hocko <mhocko@...nel.org>,
        John Hubbard <jhubbard@...dia.com>,
        linux-kernel@...r.kernel.org, Zi Yan <ziy@...dia.com>,
        Mike Rapoport <rppt@...nel.org>,
        Oscar Salvador <osalvador@...e.de>,
        Ying Chen <chenying.kernel@...edance.com>,
        Feng Zhou <zhoufeng.zf@...edance.com>,
        linux-fsdevel@...r.kernel.org
Subject: [RFC PATCH 08/15] fs: proc: use PAGES_PER_SECTION for page offline checking period.

From: Zi Yan <ziy@...dia.com>

It keeps the existing behavior after MAX_ORDER is increased beyond
a section size.

Signed-off-by: Zi Yan <ziy@...dia.com>
Cc: Mike Rapoport <rppt@...nel.org>
Cc: David Hildenbrand <david@...hat.com>
Cc: Oscar Salvador <osalvador@...e.de>
Cc: Ying Chen <chenying.kernel@...edance.com>
Cc: Feng Zhou <zhoufeng.zf@...edance.com>
Cc: linux-fsdevel@...r.kernel.org
Cc: linux-mm@...ck.org
Cc: linux-kernel@...r.kernel.org
---
 fs/proc/kcore.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/proc/kcore.c b/fs/proc/kcore.c
index 3f148759a5fd..77b7ba48fb44 100644
--- a/fs/proc/kcore.c
+++ b/fs/proc/kcore.c
@@ -486,7 +486,7 @@ read_kcore(struct file *file, char __user *buffer, size_t buflen, loff_t *fpos)
 			}
 		}
 
-		if (page_offline_frozen++ % MAX_ORDER_NR_PAGES == 0) {
+		if (page_offline_frozen++ % PAGES_PER_SECTION == 0) {
 			page_offline_thaw();
 			cond_resched();
 			page_offline_freeze();
-- 
2.30.2