Date: Thu, 29 Apr 2010 11:53:48 +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: <4BD9491C.2070303@FreeBSD.org> In-Reply-To: <E1O7PS0-00093c-9M@dilbert.ticketswitch.com> References: <E1O7PS0-00093c-9M@dilbert.ticketswitch.com>
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Pete French wrote: >> 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. > > Glad you have managed to dupliate it - the queue depth thing is > inetersting, what changes did you make ? I can try them here and see > if they improve the situation on either of my two machines. camcontrol tags da0 -N 50 -- Alexander Motin
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