linux-kernel - [PATCH v3 9/9] blk-throttle: Use more siutable time_after check for update of slice

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Message-Id: <20221205115709.251489-10-shikemeng@huaweicloud.com>
Date:   Mon,  5 Dec 2022 19:57:09 +0800
From:   Kemeng Shi <shikemeng@...weicloud.com>
To:     tj@...nel.org, josef@...icpanda.com, axboe@...nel.dk
Cc:     cgroups@...r.kernel.org, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org, shikemeng@...wei.com,
        linfeilong@...wei.com, liuzhiqiang26@...wei.com
Subject: [PATCH v3 9/9] blk-throttle: Use more siutable time_after check for update of slice_start

From: Kemeng Shi <shikemeng@...wei.com>

There is no need to update tg->slice_start[rw] to start when they are
equal already. So remove "eq" part of check before update slice_start.

Signed-off-by: Kemeng Shi <shikemeng@...wei.com>
Acked-by: Tejun Heo <tj@...nel.org>
Signed-off-by: Kemeng Shi <shikemeng@...weicloud.com>
---
 block/blk-throttle.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/block/blk-throttle.c b/block/blk-throttle.c
index 413e668249cf..6fb5a2f9e1ee 100644
--- a/block/blk-throttle.c
+++ b/block/blk-throttle.c
@@ -645,7 +645,7 @@ static inline void throtl_start_new_slice_with_credit(struct throtl_grp *tg,
 	 * that bandwidth. Do try to make use of that bandwidth while giving
 	 * credit.
 	 */
-	if (time_after_eq(start, tg->slice_start[rw]))
+	if (time_after(start, tg->slice_start[rw]))
 		tg->slice_start[rw] = start;
 
 	tg->slice_end[rw] = jiffies + tg->td->throtl_slice;
-- 
2.30.0