Date: Tue, 27 Jan 2004 10:36:10 -0500 From: "Robin P. Blanchard" <robin.blanchard@gactr.uga.edu> To: "Andre Guibert de Bruet" <andy@siliconlandmark.com>, "Ken Smith" <kensmith@cse.Buffalo.EDU>, "Kris Kennaway" <kris@obsecurity.org>, <current@freebsd.org> Subject: RE: Processes blocked on ufs or getblk Message-ID: <EE3D3FBAFFCAED448C21C398FDAD91AC0108E4@EBE1.gc.nat>
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> I'm reviving this thread as I have more information that=20 > might help track this problem down. The offending process in=20 > this case is gqview but it could have been 'find /' or any=20 > other process running when there's high system load (such as daylies). >=20 > >From the emails that I've gotten it appears that this bug=20 > affects users > that are using either ccd or hardware raid (amr driver in my=20 > case). I've attached the output of a ddb ps and a 'show lockednods'. >=20 > Every time the getblk hang rears it's ugly head, I've seen > "amr0: bad slot x completed" (where x is an integer between 0=20 > to 4) printed on the serial console. >=20 > This makes me think that there's a failure mode or special=20 > state that isn't being checked with the amr driver. Perusing=20 > the code shows that the bad slot message is a result of a=20 > NULL busy command. I'm no storage driver and my VFS knowledge=20 > is somewhat limited. Anyone out there want to have a look at=20 > this? I'm willing to try out any patches on this system. As seen previously on this list, I'm also seeing processes getting stuck = in in "getblk" state. I'm seeing this on a dell 2650 (smp enabled, acpi = enabled, aac filesystem). I'm also more than willing to try out any patches = anyone may cook up.=20 --------------------------------------- Robin P. Blanchard Systems Integration Specialist Georgia Center for Continuing Education fon: 706.542.2404 < > fax: 706.542.6546 ---------------------------------------
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