Date: Thu, 29 Apr 2010 21:45:44 -0600 From: Scott Long <scottl@samsco.org> To: Robert Noland <rnoland@FreeBSD.org> Cc: freebsd-scsi@FreeBSD.org, Alexander Motin <mav@FreeBSD.org>, FreeBSD Stable <freebsd-stable@FreeBSD.org>, Pete French <petefrench@ticketswitch.com> Subject: Re: MFC of "Large set of CAM improvements" breaks I/O to Adaptec 29160 SCSI controller Message-ID: <4A883035-3570-4FCC-B8EB-F205BD6D640D@samsco.org> In-Reply-To: <4BD98DE2.8020703@FreeBSD.org> References: <E1O7PS0-00093c-9M@dilbert.ticketswitch.com> <BCD96E46-A669-457D-A3A4-4F2E6F84E6A8@samsco.org> <4BD98DE2.8020703@FreeBSD.org>
next in thread | previous in thread | raw e-mail | index | archive | help
On Apr 29, 2010, at 7:47 AM, Robert Noland wrote: >=20 >=20 > 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. >>>=20 >> For the record, queue-full is a common, expected condition in CAM. = It's not something that should be avoided =3D-) >=20 > Should we maybe have a counter in sysctl rather than flooding the = console with these messages then? That's a pretty good idea. I'll make it happen. Scott
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?4A883035-3570-4FCC-B8EB-F205BD6D640D>