On Fri, 2014-06-20 at 11:30 +0530, Santosh Kulkarni wrote: > Hi Nab, > > On Friday 20 June 2014 01:47 AM, Nicholas A. Bellinger wrote: > > On Thu, 2014-06-19 at 14:16 +0530, Santosh Kulkarni wrote: > >> Hi Nab, > >> > >> On Thursday 19 June 2014 01:32 AM, Nicholas A. Bellinger wrote: > >>> Hi Santosh, > >>> > >>> On Wed, 2014-06-18 at 15:34 +0530, Santosh Kulkarni wrote: > >>>> Hi Nab, > >>>> > >>>> Facing Kernel OOP when i am issuing Writes across Multiple connections > >>>> in a single session. > >>>> The crash happens immediately when the DataOut PDU is sent on the second > >>>> connection. > >>>> > >>> To confirm, this occurs when the initiator sends a ISCSI_OP_SCSI_CMD > >>> with ITT=X setting it's allegiance to one connection, and then > >>> (illegally) sends a ISCSI_OP_SCSI_DATA_OUT with ITT=X on another > >>> connection, right..? > >> There was a slight mistake in the way i formed my sentence earlier. > >> The WRITE10 request and DataOut PDUs are being issued on the "same > >> connection" within a session. > >> The Crash happens only when this is issued on multiple connections.ITT > >> remains same across all connections > >> If i carry out WRITE only on single connections the target is behaving fine. > >> And the behavior is not persistent.It happens intermittently.Here is a > >> new crash dump > >> > > Mmmmm, I need the pr_debug output to be enabled in order to make further > > sense of what's going on here. > > > > Please enable CONFIG_DYNAMIC_DEBUG=y, mount debugfs at /debug and do: > > > > 'echo iscsi_target_mod +p' > /debug/dynamic_debug/cpmtrp; > > > Thanks for the quick response. > > The output was with dynamic debug mode ON. > However i double checked with the above procedure. And i see the same > debug logs. When dynamic debug is enabled, the pr_debug() messages appear in dmesg output, and not in the normal syslog / klog messages. Eg: You should see normal PDUs being processed from pr_debug() output in dmesg when enabled, along with the pr_err() output from the previous email. > The crash happens even with incremental ITT and also while using same > ITT throughout the session. > > Do let me know if you need anything else. > Adding Arshad in Cc. Can you send along the specific test off-list please..? Thanks, --nab -- To unsubscribe from this list: send the line "unsubscribe target-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
