linux-kernel - Re: 4.19 LTS high /proc/diskstats io

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Message-ID: <d38259fc-bef1-9905-0575-1fb1192aff83@kernel.dk>
Date:   Wed, 25 Mar 2020 09:24:54 -0600
From:   Jens Axboe <axboe@...nel.dk>
To:     "Rantala, Tommi T. (Nokia - FI/Espoo)" <tommi.t.rantala@...ia.com>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>
Cc:     "snitzer@...hat.com" <snitzer@...hat.com>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "osandov@...com" <osandov@...com>,
        "linux-block@...r.kernel.org" <linux-block@...r.kernel.org>,
        "mpatocka@...hat.com" <mpatocka@...hat.com>
Subject: Re: 4.19 LTS high /proc/diskstats io_ticks

On 3/25/20 5:22 AM, Rantala, Tommi T. (Nokia - FI/Espoo) wrote:
> Based on quick looks it's solved by this, I'll need to check if it's enough
> to fix it:
> 
> commit 5b18b5a737600fd20ba2045f320d5926ebbf341a
> Author: Mikulas Patocka <mpatocka@...hat.com>
> Date:   Thu Dec 6 11:41:19 2018 -0500
> 
>     block: delete part_round_stats and switch to less precise counting

Unfortunately that has its own set of issues, which are currently being
fixed just now...

-- 
Jens Axboe