From: Kemeng Shi <shikemeng@huawei.com>
To: <tj@kernel.org>, <axboe@kernel.dk>
Cc: <cgroups@vger.kernel.org>, <linux-block@vger.kernel.org>,
<linux-kernel@vger.kernel.org>, <shikemeng@huawei.com>
Subject: [PATCH 2/3] block: Correct comment for scale_cookie_change
Date: Thu, 29 Sep 2022 15:40:54 +0800 [thread overview]
Message-ID: <20220929074055.30080-3-shikemeng@huawei.com> (raw)
In-Reply-To: <20220929074055.30080-1-shikemeng@huawei.com>
Default queue depth of iolatency_grp is unlimited, so we scale down
quickly(once by half) in scale_cookie_change. Remove the "subtract
1/16th" part which is not the truth.
Signed-off-by: Kemeng Shi <shikemeng@huawei.com>
---
block/blk-iolatency.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/block/blk-iolatency.c b/block/blk-iolatency.c
index a8cc5abe91e5..2666afd7abdb 100644
--- a/block/blk-iolatency.c
+++ b/block/blk-iolatency.c
@@ -364,7 +364,7 @@ static void scale_cookie_change(struct blk_iolatency *blkiolat,
}
/*
- * Change the queue depth of the iolatency_grp. We add/subtract 1/16th of the
+ * Change the queue depth of the iolatency_grp. We add 1/16th of the
* queue depth at a time so we don't get wild swings and hopefully dial in to
* fairer distribution of the overall queue depth.
*/
--
2.30.0
next prev parent reply other threads:[~2022-09-29 7:41 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-29 7:40 [PATCH 0/3] A few cleanup patches for blk-iolatency.c Kemeng Shi
2022-09-29 7:40 ` [PATCH 1/3] block: Remove redundant parent blkcg_gp check in check_scale_change Kemeng Shi
2022-10-17 18:23 ` Josef Bacik
2022-09-29 7:40 ` Kemeng Shi [this message]
2022-10-17 18:20 ` [PATCH 2/3] block: Correct comment for scale_cookie_change Josef Bacik
2022-09-29 7:40 ` [PATCH 3/3] block: Replace struct rq_depth with unsigned int in struct iolatency_grp Kemeng Shi
2022-10-17 18:27 ` Josef Bacik
2022-10-17 2:06 ` [PATCH 0/3] A few cleanup patches for blk-iolatency.c Kemeng Shi
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