linux-kernel - Re: [PATCH v3 0/3] block/diskstats: more accurate io

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Date:   Tue, 24 Mar 2020 10:06:26 -0600
From:   Jens Axboe <axboe@...nel.dk>
To:     Konstantin Khlebnikov <khlebnikov@...dex-team.ru>,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Mikulas Patocka <mpatocka@...hat.com>,
        Mike Snitzer <snitzer@...hat.com>,
        Ming Lei <ming.lei@...hat.com>
Subject: Re: [PATCH v3 0/3] block/diskstats: more accurate io_ticks and
 optimization

On 3/24/20 12:39 AM, Konstantin Khlebnikov wrote:
> Simplified estimation for io_ticks introduced in patch
> https://lore.kernel.org/linux-block/20181206164122.2166-5-snitzer@redhat.com/
> could be very inaccurate for request longer than jiffy (i.e. any HDD)
> 
> There is at least one another report about this:
> https://lore.kernel.org/linux-block/20200324031942.GA3060@ming.t460p/
> See detail in comment for first patch.
> 
> v1: https://lore.kernel.org/lkml/155413438394.3201.15211440151043943989.stgit@buzz/
> v2: https://lore.kernel.org/lkml/158314549775.1788.6529015932237292177.stgit@buzz/
> v3:
>  * update documentation
>  * rebase to current linux-next
>  * fix compilation for CONFIG_SMP=n

Can you respin this against my for-5.7/block branch?

-- 
Jens Axboe