Date: Thu, 29 Apr 2010 08:47:14 -0500 From: Robert Noland <rnoland@FreeBSD.org> To: Scott Long <scottl@samsco.org> Cc: freebsd-scsi@FreeBSD.org, Alexander Motin <mav@FreeBSD.org>, FreeBSD Stable <freebsd-stable@FreeBSD.org>, Andy Farkas <chuzzwassa@gmail.com>, Pete French <petefrench@ticketswitch.com> Subject: Re: MFC of "Large set of CAM improvements" breaks I/O to Adaptec 29160 SCSI controller Message-ID: <4BD98DE2.8020703@FreeBSD.org> In-Reply-To: <BCD96E46-A669-457D-A3A4-4F2E6F84E6A8@samsco.org> References: <E1O7PS0-00093c-9M@dilbert.ticketswitch.com> <BCD96E46-A669-457D-A3A4-4F2E6F84E6A8@samsco.org>
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Scott Long wrote: > On Apr 29, 2010, at 2:50 AM, 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. >> > > For the record, queue-full is a common, expected condition in CAM. It's not something that should be avoided =-) Should we maybe have a counter in sysctl rather than flooding the console with these messages then? robert. > Scott > > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org"
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