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From: Ruediger Meier <sweet_f_a@gmx.de>
To: Karel Zak <kzak@redhat.com>
Subject: Re: scsi_debug, iosize optimal < minimum
Date: Thu, 4 Feb 2016 11:47:09 +0100
Cc: util-linux@vger.kernel.org
References: <201601291131.29201.sweet_f_a@gmx.de> <201602032255.44508.sweet_f_a@gmx.de> <yq1a8nhlafo.fsf@sermon.lab.mkp.net>
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On Wednesday 03 February 2016, Martin K. Petersen wrote:
> >>>>> "Ruediger" == Ruediger Meier <sweet_f_a@gmx.de> writes:
>
> Ruediger> In past (kernel<=4.1) optimal_io_size io size was 32768. Is
> Ruediger> this really correct now?
>
> We recently bumped the scsi_debug optimal I/O size to something akin
> to what real-world storage reports.

Regarding these kernel changes I've send a pull request via github to 
fix the tests:
https://github.com/karelzak/util-linux/pull/272

cu,
Rudi