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 2/2] blk-iocost: change div64_u64 to DIV64_U64_ROUND_UP in ioc_refresh_params() Date: Thu, 24 Nov 2022 22:06:35 +0800 [thread overview] Message-ID: <20221124140635.695205-2-linan122@huawei.com> (raw) In-Reply-To: <20221124140635.695205-1-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 a38a5324bf10..9030ad8672f3 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
WARNING: multiple messages have this Message-ID (diff)
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 2/2] blk-iocost: change div64_u64 to DIV64_U64_ROUND_UP in ioc_refresh_params() Date: Thu, 24 Nov 2022 22:06:35 +0800 [thread overview] Message-ID: <20221124140635.695205-2-linan122@huawei.com> (raw) In-Reply-To: <20221124140635.695205-1-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 a38a5324bf10..9030ad8672f3 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:[~2022-11-24 13:45 UTC|newest] Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-11-24 14:06 [PATCH -next 1/2] blk-iocost: fix divide by 0 error in calc_lcoefs() Li Nan 2022-11-24 14:06 ` Li Nan 2022-11-24 14:06 ` Li Nan [this message] 2022-11-24 14:06 ` [PATCH -next 2/2] blk-iocost: change div64_u64 to DIV64_U64_ROUND_UP in ioc_refresh_params() Li Nan 2022-11-25 10:14 ` Andreas Herrmann 2022-11-25 9:52 ` [PATCH -next 1/2] blk-iocost: fix divide by 0 error in calc_lcoefs() Andreas Herrmann
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