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To: Ruediger Meier <sweet_f_a@gmx.de>
Cc: Karel Zak <kzak@redhat.com>, util-linux@vger.kernel.org,
        SCSI development list <linux-scsi@vger.kernel.org>,
        Douglas Gilbert <dgilbert@interlog.com>
Subject: Re: scsi_debug, iosize optimal < minimum
From: "Martin K. Petersen" <martin.petersen@oracle.com>
References: <201601291131.29201.sweet_f_a@gmx.de>
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	<201601291718.21185.sweet_f_a@gmx.de>
Date: Mon, 01 Feb 2016 07:13:27 -0500
In-Reply-To: <201601291718.21185.sweet_f_a@gmx.de> (Ruediger Meier's message
	of "Fri, 29 Jan 2016 17:18:20 +0100")
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>>>>> "Ruediger" == Ruediger Meier <sweet_f_a@gmx.de> writes:

Ruediger> I've noticed a possible problem with scsi_debug devices where
Ruediger> optimal_io_size < minimum_io_size.

Ruediger> The problem seems reproducable with kernel 4.4.0 and also with
Ruediger> stable version 4.1.15. For stable tree the last known working
Ruediger> version is 4.1.13.

http://git.kernel.org/cgit/linux/kernel/git/mkp/scsi.git/commit/?h=4.5/scsi-fixes&id=d0eb20a863ba7dc1d3f4b841639671f134560be2

-- 
Martin K. Petersen	Oracle Linux Engineering