From b02ea78f1a288bf3a119d52ce7c2ad51465bde89 Mon Sep 17 00:00:00 2001
From: Miaohe Lin <linmiaohe@huawei.com>
Date: Thu, 2 Sep 2021 15:01:03 -0700
Subject: [PATCH] mm/vmstat: correct some wrong comments
References: bsc#1190208 (MM functional and performance backports)
Patch-mainline: v5.15-rc1
Git-commit: ea15ba17b434b7dd7f92bb85b7e5cf53707733ad
Patch series "Cleanup for vmstat".
This series contains cleanups to remove unneeded return value, correct
wrong comment and simplify the array size calculation. More details can
be found in the respective changelogs.
This patch (of 3):
Correct wrong fls(mem+1) to fls(mem)+1 and remove the duplicated comment
with quiet_vmstat().
Link: https://lkml.kernel.org/r/20210715122911.15700-1-linmiaohe@huawei.com
Link: https://lkml.kernel.org/r/20210715122911.15700-2-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Mel Gorman <mgorman@suse.de>
---
mm/vmstat.c | 7 +------
1 file changed, 1 insertion(+), 6 deletions(-)
diff --git a/mm/vmstat.c b/mm/vmstat.c
index a7ed56ac4c0b..d72aad85bd89 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -204,7 +204,7 @@ int calculate_normal_threshold(struct zone *zone)
*
* Some sample thresholds:
*
- * Threshold Processors (fls) Zonesize fls(mem+1)
+ * Threshold Processors (fls) Zonesize fls(mem)+1
* ------------------------------------------------------------------
* 8 1 1 0.9-1 GB 4
* 16 2 2 0.9-1 GB 4
@@ -1873,11 +1873,6 @@ static void vmstat_update(struct work_struct *w)
}
}
-/*
- * Switch off vmstat processing and then fold all the remaining differentials
- * until the diffs stay at zero. The function is used by NOHZ and can only be
- * invoked when tick processing is not active.
- */
/*
* Check if the diffs for a certain cpu indicate that
* an update is needed.