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SubjectRe: [PATCH RESEND v6 2/8] blk-throttle: prevent overflow while calculating wait time
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在 2022/07/28 2:28, Tejun Heo 写道:
> On Fri, Jul 01, 2022 at 05:34:35PM +0800, Yu Kuai wrote:
>> From: Yu Kuai <yukuai3@huawei.com>
>>
>> In tg_with_in_bps_limit(), 'bps_limit * jiffy_elapsed_rnd' might
>> overflow. FIx the problem by calling mul_u64_u64_div_u64() instead.
>>
>> Signed-off-by: Yu Kuai <yukuai3@huawei.com>
>
> Acked-by: Tejun Heo <tj@kernel.org>
>
> BTW, have you observed this happening or is it from just reviewing the code?

It's just from code review.

Thanks.
>
> Thanks.
>

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