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56d23ed7ad
linux/drivers/s390/scsi
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Steffen Maier 56d23ed7ad scsi: zfcp: do not trace pure benign residual HBA responses at default level 
Since quite a while, Linux issues enough SCSI commands per scsi_device
which successfully return with FCP_RESID_UNDER, FSF_FCP_RSP_AVAILABLE,
and SAM_STAT_GOOD.  This floods the HBA trace area and we cannot see
other and important HBA trace records long enough.

Therefore, do not trace HBA response errors for pure benign residual
under counts at the default trace level.

This excludes benign residual under count combined with other validity
bits set in FCP_RSP_IU, such as FCP_SNS_LEN_VAL.  For all those other
cases, we still do want to see both the HBA record and the corresponding
SCSI record by default.

Signed-off-by: Steffen Maier <maier@linux.vnet.ibm.com>
Fixes: a54ca0f62f ("[SCSI] zfcp: Redesign of the debug tracing for HBA records.")
Cc: <stable@vger.kernel.org> #2.6.37+
Reviewed-by: Benjamin Block <bblock@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-12-14 15:15:48 -05:00
..
Makefile [SCSI] zfcp: remove access control tables interface 2013-05-31 16:32:38 -07:00
zfcp_aux.c s390: Remove deprecated create_singlethread_workqueue 2016-09-06 10:59:57 +02:00
zfcp_ccw.c zfcp: auto port scan resiliency 2014-11-20 09:11:30 +01:00
zfcp_dbf.c scsi: zfcp: spin_lock_irqsave() is not nestable 2016-10-14 16:21:08 -04:00
zfcp_dbf.h scsi: zfcp: do not trace pure benign residual HBA responses at default level 2016-12-14 15:15:48 -05:00
zfcp_def.h zfcp: auto port scan resiliency 2014-11-20 09:11:30 +01:00
zfcp_erp.c zfcp: close window with unblocked rport during rport gone 2016-08-12 16:17:12 -04:00
zfcp_ext.h scsi: change FC drivers to use 'struct bsg_job' 2016-11-17 20:15:25 -05:00
zfcp_fc.c scsi: fc: use bsg_job_done 2016-11-17 20:15:26 -05:00
zfcp_fc.h scsi: remove abuses of scsi_populate_tag 2014-11-12 11:19:41 +01:00
zfcp_fsf.c zfcp: fix D_ID field with actual value on tracing SAN responses 2016-08-12 16:17:12 -04:00
zfcp_fsf.h scsi: zfcp: do not trace pure benign residual HBA responses at default level 2016-12-14 15:15:48 -05:00
zfcp_qdio.c atomic: Replace atomic_{set,clear}_mask() usage 2015-07-27 14:06:24 +02:00
zfcp_qdio.h s390/comments: unify copyright messages and remove file names 2012-07-20 11:15:04 +02:00
zfcp_reqlist.h scsi: zfcp: fix use-after-"free" in FC ingress path after TMF 2016-12-14 15:14:04 -05:00
zfcp_scsi.c scsi: zfcp: fix use-after-"free" in FC ingress path after TMF 2016-12-14 15:14:04 -05:00
zfcp_sysfs.c zfcp: auto port scan resiliency 2014-11-20 09:11:30 +01:00
zfcp_unit.c zfcp: Revert to original scanning behaviour 2016-04-15 16:53:12 -04:00