Menny, I attempted to fix this bug while ego. There were some review comments. I needed to update these patches. But, I did not get chance to update it yet. Please take a look at these patches. I will try to update these patches sometime this week. http://marc.info/?l=linux-scsi&m=128055289415827&w=4 http://marc.info/?l=linux-scsi&m=128035832331808&w=4 http://marc.info/?l=dm-devel&m=128035824431685&w=4 http://marc.info/?l=linux-scsi&m=128035797031319&w=4 http://marc.info/?l=linux-scsi&m=128035798931356&w=4 http://marc.info/?l=linux-scsi&m=128035824431684&w=4 http://marc.info/?l=linux-scsi&m=128035800631394&w=4 http://marc.info/?l=linux-scsi&m=128035828031770&w=4 As per my understating this problem happens during the combination of path removal and mode select submission. Did you try to check the device status (offline/del/cancel- which is your earlier patch) in scsi_dh_activate? That might help a little bit here. Thanks Babu ________________________________________ From: dm-devel-bounces@xxxxxxxxxx [mailto:dm-devel-bounces@xxxxxxxxxx] On Behalf Of Menny_Hamburger@xxxxxxxx Sent: Sunday, January 30, 2011 3:22 AM To: dm-devel@xxxxxxxxxx Subject: [PATCH]: scsi_dh_rdac: fix BUG_ON in get_rdac_data from within send_mode_select Hi, We are running with multipath over MD3xxx ISCSI storage (RDAC). Our test scripts perform a series of multipathd restarts, udevtrigger and udevsettle calls, during which we logout of the storage. Sometimes we get the following panic: 2011 Jan 26 22:27:01 node0 NOTICE: multipathd: dm-11: add map (uevent) 2011 Jan 26 22:27:01 node0 NOTICE: multipathd: lun5: event checker started 2011 Jan 26 22:27:01 node0 NOTICE: multipathd: dm-11: add map (uevent) 2011 Jan 26 22:27:01 node0 MAJOR: multipathd: dm-11: devmap already registered 2011 Jan 26 22:27:01 node0 NOTICE: multipathd: dm-11: add map (uevent) 2011 Jan 26 22:27:01 node0 MAJOR: multipathd: dm-11: devmap already registered 2011 Jan 26 22:27:01 node0 NOTICE: multipathd: dm-11: add map (uevent) 2011 Jan 26 22:27:01 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:01 node0 MAJOR: multipathd: dm-11: devmap already registered 2011 Jan 26 22:27:01 node0 NOTICE: multipathd: dm-0: add map (uevent) 2011 Jan 26 22:27:01 node0 NOTICE: multipathd: mpath0: event checker started 2011 Jan 26 22:27:01 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:01 node0 NOTICE: multipathd: dm-1: add map (uevent) 2011 Jan 26 22:27:01 node0 NOTICE: multipathd: mpath1: event checker started 2011 Jan 26 22:27:01 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:01 node0 NOTICE: multipathd: dm-2: add map (uevent) 2011 Jan 26 22:27:01 node0 NOTICE: multipathd: mpath2: event checker started 2011 Jan 26 22:27:01 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:01 node0 NOTICE: multipathd: dm-3: add map (uevent) 2011 Jan 26 22:27:01 node0 NOTICE: multipathd: mpath3: event checker started 2011 Jan 26 22:27:01 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:01 node0 NOTICE: multipathd: dm-4: add map (uevent) 2011 Jan 26 22:27:01 node0 NOTICE: multipathd: mpath4: event checker started 2011 Jan 26 22:27:01 node0 NOTICE: multipathd: lun5: event checker exit 2011 Jan 26 22:27:01 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:01 node0 NOTICE: multipathd: dm-5: add map (uevent) 2011 Jan 26 22:27:01 node0 NOTICE: multipathd: mpath6: event checker started 2011 Jan 26 22:27:01 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:01 node0 NOTICE: multipathd: dm-6: add map (uevent) 2011 Jan 26 22:27:01 node0 NOTICE: multipathd: mpath7: event checker started 2011 Jan 26 22:27:01 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:01 node0 NOTICE: multipathd: dm-7: add map (uevent) 2011 Jan 26 22:27:01 node0 NOTICE: multipathd: mpath8: event checker started 2011 Jan 26 22:27:01 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:01 node0 NOTICE: multipathd: dm-8: add map (uevent) 2011 Jan 26 22:27:01 node0 NOTICE: multipathd: mpath9: event checker started 2011 Jan 26 22:27:01 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:01 node0 NOTICE: multipathd: dm-9: add map (uevent) 2011 Jan 26 22:27:01 node0 NOTICE: multipathd: mpath10: event checker started 2011 Jan 26 22:27:01 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:01 node0 NOTICE: multipathd: dm-10: add map (uevent) 2011 Jan 26 22:27:01 node0 NOTICE: multipathd: mpath11: event checker started 2011 Jan 26 22:27:02 node0 INFO: kernel: sd 194:0:0:4: rdac: array MD3200i-c7-d7, ctlr 0, queueing MODE_SELECT command 2011 Jan 26 22:27:02 node0 DEBUG: hba_loader:iscsi_logout:1130: Started 2011 Jan 26 22:27:02 node0 DEBUG: hba_loader:iscsi_logout:1130: iscsi_luns_num=1 logout_iqn= 2011 Jan 26 22:27:02 node0 DEBUG: hba_loader:iscsi_logout:1130: Performing logout of all iSCSI nodes 2011 Jan 26 22:27:02 node0 NOTICE: kernel: scsi 194:0:0:0: rdac Dettached 2011 Jan 26 22:27:02 node0 NOTICE: kernel: scsi 194:0:0:1: rdac Dettached 2011 Jan 26 22:27:02 node0 NOTICE: kernel: scsi 196:0:0:0: rdac Dettached 2011 Jan 26 22:27:02 node0 NOTICE: kernel: scsi 194:0:0:2: rdac Dettached 2011 Jan 26 22:27:02 node0 NOTICE: kernel: scsi 194:0:0:3: rdac Dettached 2011 Jan 26 22:27:02 node0 NOTICE: kernel: scsi 196:0:0:1: rdac Dettached 2011 Jan 26 22:27:02 node0 NOTICE: kernel: scsi 194:0:0:4: rdac Dettached 2011 Jan 26 22:27:02 node0 NOTICE: kernel: scsi 196:0:0:2: rdac Dettached 2011 Jan 26 22:27:02 node0 NOTICE: kernel: scsi 194:0:0:5: rdac Dettached 2011 Jan 26 22:27:02 node0 NOTICE: kernel: scsi 195:0:0:0: rdac Dettached 2011 Jan 26 22:27:02 node0 NOTICE: multipathd: sdb: remove path (uevent) 2011 Jan 26 22:27:02 node0 NOTICE: kernel: scsi 196:0:0:3: rdac Dettached 2011 Jan 26 22:27:02 node0 NOTICE: kernel: scsi 195:0:0:1: rdac Dettached 2011 Jan 26 22:27:02 node0 NOTICE: kernel: scsi 196:0:0:4: rdac Dettached 2011 Jan 26 22:27:02 node0 NOTICE: kernel: scsi 195:0:0:2: rdac Dettached 2011 Jan 26 22:27:02 node0 NOTICE: kernel: scsi 195:0:0:3: rdac Dettached 2011 Jan 26 22:27:02 node0 NOTICE: kernel: scsi 196:0:0:5: rdac Dettached 2011 Jan 26 22:27:02 node0 NOTICE: kernel: scsi 195:0:0:4: rdac Dettached 2011 Jan 26 22:27:02 node0 NOTICE: kernel: scsi 196:0:0:6: rdac Dettached 2011 Jan 26 22:27:02 node0 NOTICE: kernel: scsi 195:0:0:5: rdac Dettached 2011 Jan 26 22:27:02 node0 NOTICE: kernel: scsi 195:0:0:6: rdac Dettached 2011 Jan 26 22:27:02 node0 NOTICE: kernel: scsi 196:0:0:7: rdac Dettached 2011 Jan 26 22:27:02 node0 NOTICE: kernel: scsi 195:0:0:7: rdac Dettached 2011 Jan 26 22:27:02 node0 NOTICE: kernel: scsi 196:0:0:8: rdac Dettached 2011 Jan 26 22:27:02 node0 NOTICE: kernel: scsi 195:0:0:8: rdac Dettached 2011 Jan 26 22:27:02 node0 NOTICE: kernel: scsi 195:0:0:9: rdac Dettached 2011 Jan 26 22:27:02 node0 NOTICE: kernel: scsi 196:0:0:9: rdac Dettached 2011 Jan 26 22:27:02 node0 NOTICE: kernel: scsi 194:0:0:6: rdac Dettached 2011 Jan 26 22:27:02 node0 NOTICE: kernel: scsi 196:0:0:10: rdac Dettached 2011 Jan 26 22:27:02 node0 NOTICE: kernel: scsi 194:0:0:7: rdac Dettached 2011 Jan 26 22:27:02 node0 NOTICE: kernel: scsi 194:0:0:8: rdac Dettached 2011 Jan 26 22:27:02 node0 NOTICE: kernel: scsi 196:0:0:11: rdac Dettached 2011 Jan 26 22:27:02 node0 NOTICE: kernel: scsi 194:0:0:9: rdac Dettached 2011 Jan 26 22:27:02 node0 NOTICE: kernel: scsi 194:0:0:10: rdac Dettached 2011 Jan 26 22:27:02 node0 NOTICE: kernel: scsi 194:0:0:11: rdac Dettached 2011 Jan 26 22:27:02 node0 NOTICE: kernel: scsi 193:0:0:0: rdac Dettached 2011 Jan 26 22:27:02 node0 NOTICE: kernel: scsi 195:0:0:10: rdac Dettached 2011 Jan 26 22:27:02 node0 NOTICE: kernel: scsi 193:0:0:1: rdac Dettached 2011 Jan 26 22:27:02 node0 NOTICE: kernel: scsi 193:0:0:2: rdac Dettached 2011 Jan 26 22:27:02 node0 NOTICE: kernel: scsi 193:0:0:3: rdac Dettached 2011 Jan 26 22:27:02 node0 NOTICE: kernel: scsi 193:0:0:4: rdac Dettached 2011 Jan 26 22:27:02 node0 NOTICE: kernel: scsi 193:0:0:5: rdac Dettached 2011 Jan 26 22:27:02 node0 NOTICE: kernel: scsi 193:0:0:6: rdac Dettached 2011 Jan 26 22:27:02 node0 NOTICE: kernel: scsi 193:0:0:7: rdac Dettached 2011 Jan 26 22:27:02 node0 NOTICE: kernel: scsi 193:0:0:8: rdac Dettached 2011 Jan 26 22:27:02 node0 NOTICE: kernel: scsi 193:0:0:9: rdac Dettached 2011 Jan 26 22:27:02 node0 NOTICE: kernel: scsi 193:0:0:10: rdac Dettached 2011 Jan 26 22:27:02 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:02 node0 MAJOR: kernel: device-mapper: table: 253:7: multipath: unknown path selector type 2011 Jan 26 22:27:02 node0 WARNING: kernel: device-mapper: ioctl: error adding target to table 2011 Jan 26 22:27:02 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:02 node0 MAJOR: kernel: device-mapper: table: 253:7: multipath: unknown path selector type 2011 Jan 26 22:27:02 node0 WARNING: kernel: device-mapper: ioctl: error adding target to table 2011 Jan 26 22:27:02 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:02 node0 MAJOR: kernel: device-mapper: table: 253:8: multipath: unknown path selector type 2011 Jan 26 22:27:02 node0 WARNING: kernel: device-mapper: ioctl: error adding target to table 2011 Jan 26 22:27:02 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:02 node0 MAJOR: multipathd: mpath8: failed in domap for removal of path sdb 2011 Jan 26 22:27:02 node0 MAJOR: multipathd: uevent trigger error 2011 Jan 26 22:27:02 node0 NOTICE: multipathd: sdd: remove path (uevent) 2011 Jan 26 22:27:03 node0 MAJOR: kernel: device-mapper: table: 253:8: multipath: unknown path selector type 2011 Jan 26 22:27:03 node0 WARNING: kernel: device-mapper: ioctl: error adding target to table 2011 Jan 26 22:27:03 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:03 node0 MAJOR: kernel: device-mapper: table: 253:7: multipath: unknown path selector type 2011 Jan 26 22:27:03 node0 WARNING: kernel: device-mapper: ioctl: error adding target to table 2011 Jan 26 22:27:03 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:03 node0 MAJOR: kernel: device-mapper: table: 253:7: multipath: unknown path selector type 2011 Jan 26 22:27:03 node0 WARNING: kernel: device-mapper: ioctl: error adding target to table 2011 Jan 26 22:27:03 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:03 node0 MAJOR: kernel: device-mapper: table: 253:9: multipath: unknown path selector type 2011 Jan 26 22:27:02 node0 MAJOR: multipathd: mpath9: failed in domap for removal of path sdd 2011 Jan 26 22:27:02 node0 MAJOR: multipathd: uevent trigger error 2011 Jan 26 22:27:02 node0 NOTICE: multipathd: sdh: remove path (uevent) 2011 Jan 26 22:27:03 node0 MAJOR: multipathd: mpath8: failed in domap for removal of path sdh 2011 Jan 26 22:27:03 node0 MAJOR: multipathd: uevent trigger error 2011 Jan 26 22:27:03 node0 WARNING: kernel: device-mapper: ioctl: error adding target to table 2011 Jan 26 22:27:03 node0 NOTICE: multipathd: sdf: remove path (uevent) 2011 Jan 26 22:27:03 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:03 node0 MAJOR: kernel: device-mapper: table: 253:9: multipath: unknown path selector type 2011 Jan 26 22:27:03 node0 WARNING: kernel: device-mapper: ioctl: error adding target to table 2011 Jan 26 22:27:03 node0 MAJOR: multipathd: mpath10: failed in domap for removal of path sdf 2011 Jan 26 22:27:03 node0 MAJOR: multipathd: uevent trigger error 2011 Jan 26 22:27:03 node0 NOTICE: multipathd: sdo: remove path (uevent) 2011 Jan 26 22:27:03 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:03 node0 MAJOR: kernel: device-mapper: table: 253:8: multipath: unknown path selector type 2011 Jan 26 22:27:03 node0 WARNING: kernel: device-mapper: ioctl: error adding target to table 2011 Jan 26 22:27:03 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:03 node0 MAJOR: kernel: device-mapper: table: 253:8: multipath: unknown path selector type 2011 Jan 26 22:27:03 node0 WARNING: kernel: device-mapper: ioctl: error adding target to table 2011 Jan 26 22:27:03 node0 MAJOR: multipathd: mpath9: failed in domap for removal of path sdo 2011 Jan 26 22:27:03 node0 MAJOR: multipathd: uevent trigger error 2011 Jan 26 22:27:03 node0 NOTICE: multipathd: sdj: remove path (uevent) 2011 Jan 26 22:27:03 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:03 node0 MAJOR: kernel: device-mapper: table: 253:10: multipath: unknown path selector type 2011 Jan 26 22:27:03 node0 WARNING: kernel: device-mapper: ioctl: error adding target to table 2011 Jan 26 22:27:03 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:03 node0 MAJOR: kernel: scsi 194:0:0:8: rejecting I/O to dead device 2011 Jan 26 22:27:03 node0 WARNING: kernel: device-mapper: multipath: Failing path 65:112. 2011 Jan 26 22:27:03 node0 MAJOR: kernel: scsi 195:0:0:8: rejecting I/O to dead device 2011 Jan 26 22:27:03 node0 WARNING: kernel: device-mapper: multipath: Failing path 65:160. 2011 Jan 26 22:27:03 node0 MAJOR: kernel: device-mapper: multipath: Cannot failover device because scsi_dh_rdac was not loaded. 2011 Jan 26 22:27:03 node0 WARNING: kernel: device-mapper: multipath: Failing path 66:208. 2011 Jan 26 22:27:03 node0 MAJOR: kernel: device-mapper: multipath: Cannot failover device because scsi_dh_rdac was not loaded. 2011 Jan 26 22:27:03 node0 WARNING: kernel: device-mapper: multipath: Failing path 66:224. 2011 Jan 26 22:27:03 node0 WARNING: kernel: printk: 46 messages suppressed. 2011 Jan 26 22:27:03 node0 MAJOR: kernel: Buffer I/O error on device dm-0, logical block 0 2011 Jan 26 22:27:03 node0 MAJOR: kernel: Buffer I/O error on device dm-0, logical block 1 2011 Jan 26 22:27:03 node0 MAJOR: kernel: Buffer I/O error on device dm-0, logical block 2 2011 Jan 26 22:27:03 node0 MAJOR: kernel: Buffer I/O error on device dm-0, logical block 3 2011 Jan 26 22:27:03 node0 MAJOR: kernel: device-mapper: table: 253:10: multipath: unknown path selector type 2011 Jan 26 22:27:03 node0 WARNING: kernel: device-mapper: ioctl: error adding target to table 2011 Jan 26 22:27:03 node0 MAJOR: kernel: Buffer I/O error on device dm-0, logical block 0 2011 Jan 26 22:27:03 node0 MAJOR: kernel: Buffer I/O error on device dm-0, logical block 70778879 2011 Jan 26 22:27:03 node0 MAJOR: kernel: Buffer I/O error on device dm-0, logical block 70778879 2011 Jan 26 22:27:03 node0 MAJOR: kernel: Buffer I/O error on device dm-0, logical block 0 2011 Jan 26 22:27:03 node0 MAJOR: kernel: Buffer I/O error on device dm-0, logical block 0 2011 Jan 26 22:27:03 node0 MAJOR: kernel: Buffer I/O error on device dm-0, logical block 3 2011 Jan 26 22:27:03 node0 MAJOR: multipathd: mpath11: failed in domap for removal of path sdj 2011 Jan 26 22:27:03 node0 MAJOR: multipathd: uevent trigger error 2011 Jan 26 22:27:03 node0 NOTICE: multipathd: sdl: remove path (uevent) 2011 Jan 26 22:27:03 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:03 node0 MAJOR: kernel: device-mapper: table: 253:3: multipath: unknown path selector type 2011 Jan 26 22:27:03 node0 WARNING: kernel: device-mapper: ioctl: error adding target to table 2011 Jan 26 22:27:03 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:03 node0 MAJOR: kernel: device-mapper: table: 253:3: multipath: unknown path selector type 2011 Jan 26 22:27:03 node0 WARNING: kernel: device-mapper: ioctl: error adding target to table 2011 Jan 26 22:27:03 node0 MAJOR: multipathd: mpath3: failed in domap for removal of path sdl 2011 Jan 26 22:27:03 node0 MAJOR: multipathd: uevent trigger error 2011 Jan 26 22:27:03 node0 NOTICE: multipathd: 65:160: mark as failed 2011 Jan 26 22:27:03 node0 NOTICE: multipathd: mpath0: remaining active paths: 3 2011 Jan 26 22:27:03 node0 NOTICE: multipathd: 65:112: mark as failed 2011 Jan 26 22:27:03 node0 NOTICE: multipathd: mpath0: remaining active paths: 2 2011 Jan 26 22:27:03 node0 NOTICE: multipathd: 66:208: mark as failed 2011 Jan 26 22:27:03 node0 NOTICE: multipathd: mpath0: remaining active paths: 1 2011 Jan 26 22:27:03 node0 NOTICE: multipathd: 66:224: mark as failed 2011 Jan 26 22:27:03 node0 NOTICE: multipathd: mpath0: remaining active paths: 0 2011 Jan 26 22:27:03 node0 NOTICE: multipathd: sdt: remove path (uevent) 2011 Jan 26 22:27:03 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:03 node0 MAJOR: kernel: device-mapper: table: 253:9: multipath: unknown path selector type 2011 Jan 26 22:27:03 node0 WARNING: kernel: device-mapper: ioctl: error adding target to table 2011 Jan 26 22:27:03 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:03 node0 MAJOR: kernel: device-mapper: table: 253:9: multipath: unknown path selector type 2011 Jan 26 22:27:03 node0 WARNING: kernel: device-mapper: ioctl: error adding target to table 2011 Jan 26 22:27:03 node0 MAJOR: multipathd: mpath10: failed in domap for removal of path sdt 2011 Jan 26 22:27:03 node0 MAJOR: multipathd: uevent trigger error 2011 Jan 26 22:27:03 node0 NOTICE: multipathd: sdn: remove path (uevent) 2011 Jan 26 22:27:03 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:03 node0 MAJOR: kernel: device-mapper: table: 253:4: multipath: unknown path selector type 2011 Jan 26 22:27:03 node0 WARNING: kernel: device-mapper: ioctl: error adding target to table 2011 Jan 26 22:27:03 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:03 node0 MAJOR: kernel: device-mapper: table: 253:4: multipath: unknown path selector type 2011 Jan 26 22:27:03 node0 WARNING: kernel: device-mapper: ioctl: error adding target to table 2011 Jan 26 22:27:03 node0 MAJOR: multipathd: mpath4: failed in domap for removal of path sdn 2011 Jan 26 22:27:03 node0 MAJOR: multipathd: uevent trigger error 2011 Jan 26 22:27:03 node0 NOTICE: multipathd: sdy: remove path (uevent) 2011 Jan 26 22:27:03 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:03 node0 MAJOR: kernel: device-mapper: table: 253:10: multipath: unknown path selector type 2011 Jan 26 22:27:03 node0 WARNING: kernel: device-mapper: ioctl: error adding target to table 2011 Jan 26 22:27:03 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:03 node0 MAJOR: kernel: device-mapper: table: 253:10: multipath: unknown path selector type 2011 Jan 26 22:27:03 node0 WARNING: kernel: device-mapper: ioctl: error adding target to table 2011 Jan 26 22:27:03 node0 MAJOR: multipathd: mpath11: failed in domap for removal of path sdy 2011 Jan 26 22:27:03 node0 MAJOR: multipathd: uevent trigger error 2011 Jan 26 22:27:03 node0 NOTICE: multipathd: sdc: remove path (uevent) 2011 Jan 26 22:27:03 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:03 node0 MAJOR: kernel: device-mapper: table: 253:7: multipath: unknown path selector type 2011 Jan 26 22:27:03 node0 WARNING: kernel: device-mapper: ioctl: error adding target to table 2011 Jan 26 22:27:03 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:03 node0 MAJOR: kernel: device-mapper: table: 253:7: multipath: unknown path selector type 2011 Jan 26 22:27:03 node0 WARNING: kernel: device-mapper: ioctl: error adding target to table 2011 Jan 26 22:27:03 node0 MAJOR: multipathd: mpath8: failed in domap for removal of path sdc 2011 Jan 26 22:27:03 node0 MAJOR: multipathd: uevent trigger error 2011 Jan 26 22:27:03 node0 NOTICE: multipathd: sde: remove path (uevent) 2011 Jan 26 22:27:03 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:03 node0 MAJOR: kernel: device-mapper: table: 253:8: multipath: unknown path selector type 2011 Jan 26 22:27:03 node0 WARNING: kernel: device-mapper: ioctl: error adding target to table 2011 Jan 26 22:27:03 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:03 node0 MAJOR: kernel: device-mapper: table: 253:8: multipath: unknown path selector type 2011 Jan 26 22:27:03 node0 WARNING: kernel: device-mapper: ioctl: error adding target to table 2011 Jan 26 22:27:03 node0 MAJOR: multipathd: mpath9: failed in domap for removal of path sde 2011 Jan 26 22:27:03 node0 MAJOR: multipathd: uevent trigger error 2011 Jan 26 22:27:03 node0 NOTICE: multipathd: sdaf: remove path (uevent) 2011 Jan 26 22:27:03 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:03 node0 MAJOR: kernel: device-mapper: table: 253:3: multipath: unknown path selector type 2011 Jan 26 22:27:03 node0 WARNING: kernel: device-mapper: ioctl: error adding target to table 2011 Jan 26 22:27:03 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:03 node0 MAJOR: kernel: device-mapper: table: 253:3: multipath: unknown path selector type 2011 Jan 26 22:27:03 node0 WARNING: kernel: device-mapper: ioctl: error adding target to table 2011 Jan 26 22:27:03 node0 MAJOR: multipathd: mpath3: failed in domap for removal of path sdaf 2011 Jan 26 22:27:03 node0 MAJOR: multipathd: uevent trigger error 2011 Jan 26 22:27:03 node0 NOTICE: multipathd: sdg: remove path (uevent) 2011 Jan 26 22:27:03 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:03 node0 MAJOR: kernel: device-mapper: table: 253:9: multipath: unknown path selector type 2011 Jan 26 22:27:03 node0 WARNING: kernel: device-mapper: ioctl: error adding target to table 2011 Jan 26 22:27:03 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:03 node0 MAJOR: kernel: device-mapper: table: 253:9: multipath: unknown path selector type 2011 Jan 26 22:27:03 node0 WARNING: kernel: device-mapper: ioctl: error adding target to table 2011 Jan 26 22:27:03 node0 MAJOR: multipathd: mpath10: failed in domap for removal of path sdg 2011 Jan 26 22:27:03 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:03 node0 MAJOR: kernel: device-mapper: table: 253:4: multipath: unknown path selector type 2011 Jan 26 22:27:03 node0 WARNING: kernel: device-mapper: ioctl: error adding target to table 2011 Jan 26 22:27:03 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:03 node0 MAJOR: kernel: device-mapper: table: 253:4: multipath: unknown path selector type 2011 Jan 26 22:27:03 node0 WARNING: kernel: device-mapper: ioctl: error adding target to table 2011 Jan 26 22:27:03 node0 MAJOR: multipathd: uevent trigger error 2011 Jan 26 22:27:03 node0 NOTICE: multipathd: sdah: remove path (uevent) 2011 Jan 26 22:27:03 node0 MAJOR: multipathd: mpath4: failed in domap for removal of path sdah 2011 Jan 26 22:27:03 node0 MAJOR: multipathd: uevent trigger error 2011 Jan 26 22:27:03 node0 NOTICE: multipathd: sdk: remove path (uevent) 2011 Jan 26 22:27:03 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:03 node0 MAJOR: kernel: device-mapper: table: 253:10: multipath: unknown path selector type 2011 Jan 26 22:27:03 node0 WARNING: kernel: device-mapper: ioctl: error adding target to table 2011 Jan 26 22:27:03 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:03 node0 MAJOR: kernel: device-mapper: table: 253:10: multipath: unknown path selector type 2011 Jan 26 22:27:03 node0 WARNING: kernel: device-mapper: ioctl: error adding target to table 2011 Jan 26 22:27:03 node0 MAJOR: multipathd: mpath11: failed in domap for removal of path sdk 2011 Jan 26 22:27:03 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:03 node0 MAJOR: kernel: device-mapper: table: 253:3: multipath: unknown path selector type 2011 Jan 26 22:27:03 node0 WARNING: kernel: device-mapper: ioctl: error adding target to table 2011 Jan 26 22:27:03 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:03 node0 MAJOR: kernel: device-mapper: table: 253:3: multipath: unknown path selector type 2011 Jan 26 22:27:03 node0 WARNING: kernel: device-mapper: ioctl: error adding target to table 2011 Jan 26 22:27:03 node0 MAJOR: multipathd: uevent trigger error 2011 Jan 26 22:27:03 node0 NOTICE: multipathd: sdm: remove path (uevent) 2011 Jan 26 22:27:03 node0 MAJOR: multipathd: mpath3: failed in domap for removal of path sdm 2011 Jan 26 22:27:03 node0 MAJOR: multipathd: uevent trigger error 2011 Jan 26 22:27:03 node0 NOTICE: multipathd: sdan: remove path (uevent) 2011 Jan 26 22:27:03 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:03 node0 MAJOR: kernel: device-mapper: table: 253:5: multipath: unknown path selector type 2011 Jan 26 22:27:03 node0 WARNING: kernel: device-mapper: ioctl: error adding target to table 2011 Jan 26 22:27:03 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:03 node0 MAJOR: kernel: device-mapper: table: 253:5: multipath: unknown path selector type 2011 Jan 26 22:27:03 node0 WARNING: kernel: device-mapper: ioctl: error adding target to table 2011 Jan 26 22:27:03 node0 MAJOR: multipathd: mpath6: failed in domap for removal of path sdan 2011 Jan 26 22:27:03 node0 MAJOR: multipathd: uevent trigger error 2011 Jan 26 22:27:03 node0 NOTICE: multipathd: sdq: remove path (uevent) 2011 Jan 26 22:27:03 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:03 node0 MAJOR: kernel: device-mapper: table: 253:4: multipath: unknown path selector type 2011 Jan 26 22:27:03 node0 WARNING: kernel: device-mapper: ioctl: error adding target to table 2011 Jan 26 22:27:03 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:03 node0 MAJOR: kernel: device-mapper: table: 253:4: multipath: unknown path selector type 2011 Jan 26 22:27:03 node0 WARNING: kernel: device-mapper: ioctl: error adding target to table 2011 Jan 26 22:27:03 node0 MAJOR: multipathd: mpath4: failed in domap for removal of path sdq 2011 Jan 26 22:27:03 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:03 node0 MAJOR: kernel: device-mapper: table: 253:6: multipath: unknown path selector type 2011 Jan 26 22:27:03 node0 WARNING: kernel: device-mapper: ioctl: error adding target to table 2011 Jan 26 22:27:03 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:03 node0 MAJOR: kernel: device-mapper: table: 253:6: multipath: unknown path selector type 2011 Jan 26 22:27:03 node0 WARNING: kernel: device-mapper: ioctl: error adding target to table 2011 Jan 26 22:27:03 node0 MAJOR: multipathd: uevent trigger error 2011 Jan 26 22:27:03 node0 NOTICE: multipathd: sdap: remove path (uevent) 2011 Jan 26 22:27:03 node0 MAJOR: multipathd: mpath7: failed in domap for removal of path sdap 2011 Jan 26 22:27:03 node0 MAJOR: multipathd: uevent trigger error 2011 Jan 26 22:27:03 node0 NOTICE: multipathd: sds: remove path (uevent) 2011 Jan 26 22:27:03 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:03 node0 MAJOR: kernel: device-mapper: table: 253:5: multipath: unknown path selector type 2011 Jan 26 22:27:03 node0 WARNING: kernel: device-mapper: ioctl: error adding target to table 2011 Jan 26 22:27:03 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:03 node0 MAJOR: kernel: device-mapper: table: 253:5: multipath: unknown path selector type 2011 Jan 26 22:27:03 node0 WARNING: kernel: device-mapper: ioctl: error adding target to table 2011 Jan 26 22:27:03 node0 MAJOR: multipathd: mpath6: failed in domap for removal of path sds 2011 Jan 26 22:27:03 node0 MAJOR: multipathd: uevent trigger error 2011 Jan 26 22:27:03 node0 NOTICE: multipathd: sdw: remove path (uevent) 2011 Jan 26 22:27:03 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:03 node0 MAJOR: kernel: device-mapper: table: 253:6: multipath: unknown path selector type 2011 Jan 26 22:27:03 node0 WARNING: kernel: device-mapper: ioctl: error adding target to table 2011 Jan 26 22:27:03 node0 INFO: kernel: device-mapper: multipath: Using scsi_dh module scsi_dh_rdac for failover/failback and device management. 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: ----------- [cut here ] --------- [please bite here ] --------- 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: Kernel BUG at drivers/scsi/device_handler/scsi_dh_rdac.c:252 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: invalid opcode: 0000 [1] 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: SMP 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: last sysfs file: /class/iscsi_session/session9/ifacename 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: CPU 2 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: Modules linked in: 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: iscsi_tcp(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: libiscsi_tcp(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: libiscsi2(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: scsi_transport_iscsi2(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: scsi_transport_iscsi(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: ipmi_si(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: scsi_dh_rdac(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: dm_rdac(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: dm_queue_depth(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: netconsole(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: dm_round_robin(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: mptctl(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: dell_rbu(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: exa_ioctls(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: nfs(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: lockd(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: nfs_acl(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: xt_tcpudp(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: iptable_filter(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: ip_tables(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: ipt_SYSRQ(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: x_tables(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: sunrpc(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: ipmi_devintf(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: ipmi_msghandler(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: bonding1(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: bonding(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: ipv6(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: xfrm_nalgo(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: crypto_api(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: dm_mirror(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: dm_log(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: dm_multipath(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: scsi_dh(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: dm_mod(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: video(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: hwmon(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: backlight(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: sbs(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: i2c_ec(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: i2c_core(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: button(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: battery(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: asus_acpi(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: ac(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: joydev(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: sr_mod(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: cdrom(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: bnx2(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: sg(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: pcspkr(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: ata_piix(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: libata(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: mptsas(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: mptscsih(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: mptbase(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: scsi_transport_sas(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: sd_mod(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: scsi_mod(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: ext3(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: jbd(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: uhci_hcd(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: ohci_hcd(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: ehci_hcd(U) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: Pid: 12912, comm: kmpath_rdacd Tainted: G 2.6.18-164sys #1 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: RIP: 0010:[<ffffffff8838dc4f>] 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: [<ffffffff8838dc4f>] :scsi_dh_rdac:send_mode_select+0x2cf/0x4b0 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: device-mapper: table: 253:6: multipath: unknown path selector type 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: device-mapper: ioctl: error adding target to table 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: RSP: 0018:ffff810086959d80 EFLAGS: 00010246 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: RAX: 0000000000000000 RBX: 00000000fffffffb RCX: 0000000000000000 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: RDX: 0000000000000800 RSI: 0000000000000286 RDI: ffff810055e2d800 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: RBP: ffff81005a647216 R08: ffffffff80370b58 R09: 0000000000000001 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: R10: 0000000000000046 R11: ffffffff8004c200 R12: 0000000000000000 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: R13: 0000000000000000 R14: ffff8102352bc000 R15: ffff8102352bc062 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: FS: 0000000000000000(0000) GS:ffff810107eda340(0000) knlGS:0000000000000000 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: CR2: 00002ae8ff6760a0 CR3: 000000023487c000 CR4: 00000000000006e0 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: Process kmpath_rdacd (pid: 12912, threadinfo ffff810086958000, task ffff810092a54140) 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: Stack: 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: 0000000010008040 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: ffff81005b23a5c0 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: ffff810086959e70 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: ffff810086959dd0 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: ffff810001004498 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: ffff810055e2d800 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: ffff81005a647208 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: ffff81004d3226f0 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: 0000000380438420 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: 0000000000000001 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: ffff81023a498d80 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: ffff81023a498d80 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: Call Trace: 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: [<ffffffff8838d980>] :scsi_dh_rdac:send_mode_select+0x0/0x4b0 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: [<ffffffff800561a3>] run_workqueue+0xb3/0x110 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: [<ffffffff80052180>] worker_thread+0x0/0x150 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: [<ffffffff800b33b0>] keventd_create_kthread+0x0/0xa0 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: [<ffffffff80052291>] worker_thread+0x111/0x150 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: [<ffffffff8009ca00>] default_wake_function+0x0/0x10 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: [<ffffffff80052180>] worker_thread+0x0/0x150 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: [<ffffffff800373c9>] kthread+0xd9/0x120 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: [<ffffffff80068fb1>] child_rip+0xa/0x11 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: [<ffffffff800b33b0>] keventd_create_kthread+0x0/0xa0 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: [<ffffffff800372f0>] kthread+0x0/0x120 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: [<ffffffff80068fa7>] child_rip+0x0/0x11 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: Code: 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: 0f 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: 0b 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: 68 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: 98 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: e1 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: 38 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: 88 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: c2 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: fc 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: 00 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: 0f 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: 1f 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: 80 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: 00 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: 00 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: 00 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: 00 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: 48 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: 8d 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: 54 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: RIP 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: [<ffffffff8838dc4f>] :scsi_dh_rdac:send_mode_select+0x2cf/0x4b0 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: RSP <ffff810086959d80> 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: 2011 Jan 26 22:27:03 172.19.59.130 EMERG: Kernel panic - not syncing: Fatal exception 2011 Jan 26 22:27:03 172.19.59.130 NOTICE: 2011 Jan 26 22:27:03 172.19.59.130 EMERG: Rebooting in 1 seconds.. This panic comes from get_rdac_data, which is called from within the send_mode_select code. My analysis picked up the following problem: The RDAC detach code nullifies the scsi_dh_data before flushing the mode select workqueue, and as result a pending send_mode_select will BUG_ON in get_rdac_data. The following patch (tested over RHEL54) flushes the workqueue before setting scsi_dh_data to NULL: diff -r -U 2 a/drivers/scsi/device_handler/scsi_dh_rdac.c b/drivers/scsi/device_handler/scsi_dh_rdac.c --- a/drivers/scsi/device_handler/scsi_dh_rdac.c 2011-01-30 11:02:31.271426000 +0200 +++ b/drivers/scsi/device_handler/scsi_dh_rdac.c 2011-01-30 11:02:31.327069000 +0200 @@ -853,8 +853,22 @@ spin_lock_irqsave(sdev->request_queue->queue_lock, flags); scsi_dh_data = retrieve_scsi_dh_data(sdev); - store_scsi_dh_data(sdev, NULL); spin_unlock_irqrestore(sdev->request_queue->queue_lock, flags); h = (struct rdac_dh_data *) scsi_dh_data->buf; + if (h->ctlr) { + int flush; + + spin_lock(&h->ctlr->ms_lock); + flush = (h->ctlr->ms_sdev == sdev); + spin_unlock(&h->ctlr->ms_lock); + + if (flush) + flush_workqueue(kmpath_rdacd); + } + + spin_lock_irqsave(sdev->request_queue->queue_lock, flags); + store_scsi_dh_data(sdev, NULL); + spin_unlock_irqrestore(sdev->request_queue->queue_lock, flags); + if (h->ctlr) kref_put(&h->ctlr->kref, release_controller); The patch ensures that we run flush only when detaching the device the "owns" the send_mode_select (ms_sdev). Menny -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
