linux-kernel - [PATCH] fs: quota: use group allocation of per-cpu counters API

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Date: Mon, 25 Mar 2024 12:12:40 +0800
From: Kefeng Wang <wangkefeng.wang@...wei.com>
To: Jan Kara <jack@...e.com>, Dennis Zhou <dennis@...nel.org>
CC: <linux-kernel@...r.kernel.org>, Kefeng Wang <wangkefeng.wang@...wei.com>
Subject: [PATCH] fs: quota: use group allocation of per-cpu counters API

Use group allocation of per-cpu counters api to accelerate
dquot_init() and simplify code.

Signed-off-by: Kefeng Wang <wangkefeng.wang@...wei.com>
---
 fs/quota/dquot.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
index dacbee455c03..808544f74e5e 100644
--- a/fs/quota/dquot.c
+++ b/fs/quota/dquot.c
@@ -3016,11 +3016,10 @@ static int __init dquot_init(void)
 	if (!dquot_hash)
 		panic("Cannot create dquot hash table");
 
-	for (i = 0; i < _DQST_DQSTAT_LAST; i++) {
-		ret = percpu_counter_init(&dqstats.counter[i], 0, GFP_KERNEL);
-		if (ret)
-			panic("Cannot create dquot stat counters");
-	}
+	ret = percpu_counter_init_many(dqstats.counter, 0, GFP_KERNEL,
+				       _DQST_DQSTAT_LAST);
+	if (ret)
+		panic("Cannot create dquot stat counters");
 
 	/* Find power-of-two hlist_heads which can fit into allocation */
 	nr_hash = (1UL << order) * PAGE_SIZE / sizeof(struct hlist_head);
-- 
2.41.0