From: Li Nan <linan122@huawei.com>
To: <tj@kernel.org>, <josef@toxicpanda.com>, <axboe@kernel.dk>
Cc: <cgroups@vger.kernel.org>, <linux-block@vger.kernel.org>,
<linux-kernel@vger.kernel.org>, <linan122@huawei.com>,
<yukuai3@huawei.com>, <yi.zhang@huawei.com>
Subject: [PATCH -next 6/8] blk-iocost: change div64_u64 to DIV64_U64_ROUND_UP in ioc_refresh_params()
Date: Mon, 28 Nov 2022 23:44:32 +0800 [thread overview]
Message-ID: <20221128154434.4177442-7-linan122@huawei.com> (raw)
In-Reply-To: <20221128154434.4177442-1-linan122@huawei.com>
vrate_min is calculated by DIV64_U64_ROUND_UP, but vrate_max is calculated
by div64_u64. Vrate_min may be 1 greater than vrate_max if the input
values min and max of cost.qos are equal.
Signed-off-by: Li Nan <linan122@huawei.com>
---
block/blk-iocost.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/block/blk-iocost.c b/block/blk-iocost.c
index a4fa17ebb2fa..03977385449f 100644
--- a/block/blk-iocost.c
+++ b/block/blk-iocost.c
@@ -926,7 +926,7 @@ static bool ioc_refresh_params(struct ioc *ioc, bool force)
ioc->vrate_min = DIV64_U64_ROUND_UP((u64)ioc->params.qos[QOS_MIN] *
VTIME_PER_USEC, MILLION);
- ioc->vrate_max = div64_u64((u64)ioc->params.qos[QOS_MAX] *
+ ioc->vrate_max = DIV64_U64_ROUND_UP((u64)ioc->params.qos[QOS_MAX] *
VTIME_PER_USEC, MILLION);
return true;
--
2.31.1
next prev parent reply other threads:[~2022-11-28 15:24 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-28 15:44 [PATCH -next 0/8] iocost bugfix Li Nan
2022-11-28 15:44 ` [PATCH -next 1/8] blk-iocost: cleanup ioc_qos_write() and ioc_cost_model_write() Li Nan
2022-11-28 15:44 ` [PATCH -next 2/8] blk-iocost: improve hanlder of match_u64() Li Nan
2022-11-28 15:44 ` [PATCH -next 3/8] blk-iocost: don't allow to configure bio based device Li Nan
2022-11-28 15:44 ` [PATCH -next 4/8] blk-iocost: read params inside lock in sysfs apis Li Nan
2022-11-28 15:44 ` [PATCH -next 5/8] blk-iocost: fix divide by 0 error in calc_lcoefs() Li Nan
2022-11-28 15:44 ` Li Nan [this message]
2022-11-28 15:44 ` [PATCH -next 7/8] blk-iocost: fix possible UAF in ioc_pd_free Li Nan
2022-11-29 12:18 ` Yu Kuai
2022-11-28 15:44 ` [PATCH -next 8/8] block: fix null-pointer dereference in ioc_pd_init Li Nan
2022-11-29 11:23 ` kernel test robot
2022-11-29 14:25 ` Christoph Hellwig
2022-11-30 1:32 ` Yu Kuai
2022-11-30 15:59 ` Christoph Hellwig
2022-11-30 0:50 ` kernel test robot
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