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Date:      Wed, 28 Apr 2010 23:12:28 +0300
From:      Alexander Motin <mav@FreeBSD.org>
To:        Pete French <petefrench@ticketswitch.com>
Cc:        freebsd-scsi@freebsd.org, scottl@FreeBSD.org, freebsd-stable@freebsd.org
Subject:   Re: MFC of "Large set of CAM improvements" breaks I/O to Adaptec 29160 SCSI controller
Message-ID:  <4BD896AC.4080509@FreeBSD.org>
In-Reply-To: <E1O7AGM-0005ux-8E@dilbert.ticketswitch.com>
References:  <E1O7AGM-0005ux-8E@dilbert.ticketswitch.com>

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Pete French wrote:
>> I have some 29160N locally and I'll try to reproduce this.
> 
> I would suggest you try gmirror across two drives - that is how
> both myself and the original poster first noticed the issue.

Thanks. First step successful - I can steadily reproduce problem on
CURRENT. raidtest with 200 I/O streams over gmirror of two disks on same
channel triggers issue in seconds. Any I/O on channel dying after both
disks report "Queue full" error same time. The rest of system works
fine. If I preliminarily manually adjust queue depth of one disk -
everything works fine. I'll investigate it tomorrow.

-- 
Alexander Motin



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