[RFC PATCH v2 06/12] fs: proc: use pageblock_nr_pages for reschedule period in read_kcore()

[Zi Yan]

From: Zi Yan <ziy@xxxxxxxxxx>

MAX_ORDER_NR_PAGES can be increased when it becomes a boot time parameter
in later commits. To make sure read_kcore() reschedule its work in a
constant period, use pageblock_nr_pages instead for reschedule period,
since pageblock_nr_pages is a constant and either the same or half of
MAX_ORDER_NR_PAGES.

Signed-off-by: Zi Yan <ziy@xxxxxxxxxx>
Cc: Mike Rapoport <rppt@xxxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: Oscar Salvador <osalvador@xxxxxxx>
Cc: Ying Chen <chenying.kernel@xxxxxxxxxxxxx>
Cc: Feng Zhou <zhoufeng.zf@xxxxxxxxxxxxx>
Cc: linux-fsdevel@xxxxxxxxxxxxxxx
Cc: linux-mm@xxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
---
 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 dff921f7ca33..7dc09d211b48 100644
--- a/fs/proc/kcore.c
+++ b/fs/proc/kcore.c
@@ -491,7 +491,7 @@ 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++ % pageblock_nr_pages == 0) {
 			page_offline_thaw();
 			cond_resched();
 			page_offline_freeze();
-- 
2.35.1