Re: [PATCH RESEND v6 2/8] blk-throttle: prevent overflow while calculating wait time

[Tejun Heo]

On Fri, Jul 01, 2022 at 05:34:35PM +0800, Yu Kuai wrote:
> From: Yu Kuai <yukuai3@xxxxxxxxxx>
> 
> 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@xxxxxxxxxx>

Acked-by: Tejun Heo <tj@xxxxxxxxxx>

BTW, have you observed this happening or is it from just reviewing the code?

Thanks.

-- 
tejun