kern/169431: [mps] [cam] SAS bus scan generates thousands of lin
>Number: 169431
>Category: kern
>Synopsis: [mps] [cam] SAS bus scan generates thousands of lines to log
>Confidential: no
>Severity: non-critical
>Priority: high
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Tue Jun 26 02:10:07 UTC 2012
>Closed-Date:
>Last-Modified:
>Originator: Garrett Wollman
>Release: FreeBSD 9.0-STABLE amd64
>Organization:
MIT Computer Science & Artificial Intelligence Lab
>Environment:
System: FreeBSD nfs-prod-0.csail.mit.edu 9.0-STABLE FreeBSD 9.0-STABLE #6 r237562M: Mon Jun 25 13:22:45 EDT 2012 wollman@xyz.csail.mit.edu:/usr/obj/usr/src/sys/CSAIL amd64
Local changes to sources do not affect mps driver.
Only special tunable set is:
hw.mps.max_chains=4096
....as in previous testing (under 9.0 with a backported driver) we were
able to exhaust the default limit of 2048.
>Description:
When scanning for devices connected to an LSI SAS2116 controller using
the mps(4) driver, thousands of lines like this are generated on the
console:
Jun 25 19:21:20 nfs-prod-0 kernel: (probe752:mps0:0:753:0): INQUIRY. CDB: 12 0 0 0 24 0
Jun 25 19:21:20 nfs-prod-0 kernel: (probe752:mps0:0:753:0): CAM status: Invalid Target ID
Jun 25 19:21:20 nfs-prod-0 kernel: (probe752:mps0:0:753:0): Error 22, Unretryable error
Jun 25 19:21:20 nfs-prod-0 kernel: (probe753:mps0:0:754:0): INQUIRY. CDB: 12 0 0 0 24 0
Jun 25 19:21:20 nfs-prod-0 kernel: (probe753:mps0:0:754:0): CAM status: Invalid Target ID
Jun 25 19:21:20 nfs-prod-0 kernel: (probe753:mps0:0:754:0): Error 22, Unretryable error
Jun 25 19:21:20 nfs-prod-0 kernel: (probe754:mps0:0:755:0): INQUIRY. CDB: 12 0 0 0 24 0
Jun 25 19:21:20 nfs-prod-0 kernel: (probe754:mps0:0:755:0): CAM status: Invalid Target ID
Jun 25 19:21:20 nfs-prod-0 kernel: (probe754:mps0:0:755:0): Error 22, Unretryable error
This is new with the 9.1 kernel; 9.0 did not do this even with the
backported driver.
The drives are ultimately found and attached normally.
>How-To-Repeat:
Cause a bus rescan (e.g., by plugging a disk shelf into one of the ports
on the controller).
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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