linux-kernel - Re: [PATCH REPOST blktests v2 7/9] nvme-rc: Calculate IO size for fio jobs

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Message-ID: <k54c3p47ot3aj7srqyx5ayrjawmdqj47hvtwcxyps67gfq533b@ftj2ugr4lalm>
Date:   Tue, 2 May 2023 17:45:45 +0200
From:   Daniel Wagner <dwagner@...e.de>
To:     Shinichiro Kawasaki <shinichiro.kawasaki@....com>
Cc:     "linux-nvme@...ts.infradead.org" <linux-nvme@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-block@...r.kernel.org" <linux-block@...r.kernel.org>,
        Chaitanya Kulkarni <kch@...dia.com>,
        Shin'ichiro Kawasaki <shinichiro@...tmail.com>
Subject: Re: [PATCH REPOST blktests v2 7/9] nvme-rc: Calculate IO size for
 fio jobs

On Fri, Apr 28, 2023 at 04:00:54AM +0000, Shinichiro Kawasaki wrote:
> On Apr 21, 2023 / 08:05, Daniel Wagner wrote:
> > Introduce two new function to calculate the IO size for fio jobs.
> > 
> > _nvme_calc_io_size() returns the jobs size for _run_fio_verify_io()
> > function. Reduce the max size of the job by one megabyte to make the
> > test more robust not to run out of space by accident. Note these fio
> > calls run with just one jobs.
> 
> It is not clear for me what kind of issue happens without the 1MB decrement.
> Could you share failure symptoms you observed?

As I said, this is just to make the test more robust as this the size limits
are not the main objective of these tests. I don't care about this too
much, I'll just drop it then.