On 04/11/2016 01:48 PM, Quinn Tran wrote: > Joe, > > How do I get access to this specific Ubuntu kernel where the bug is found? Is there stack trace/bug report that you could share? Any data would be helpful. Thanks. The git tree for the specific Ubuntu kernel that exhibits this bug can be found here: git://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/xenial The bug can be found here, and has screen shots of the panic as well as dmesg under the "Attachments" header: http://pad.lv/1554003 Just let me know if additional debug information is needed. > > In the mean time, I will download 4.5 rc4 to re-verify. > > Regards, > Quinn Tran > > > > > > > -----Original Message----- > From: Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx> > Date: Monday, April 11, 2016 at 10:26 AM > To: Quinn Tran <quinn.tran@xxxxxxxxxx> > Cc: Dept-Eng QLA2xxx Upstream <qla2xxx-upstream@xxxxxxxxxx>, "jejb@xxxxxxxxxxxxxxxxxx" <jejb@xxxxxxxxxxxxxxxxxx>, "Martin K. Petersen" <martin.petersen@xxxxxxxxxx>, linux-scsi <linux-scsi@xxxxxxxxxxxxxxx>, linux-kernel <linux-kernel@xxxxxxxxxxxxxxx>, "hch@xxxxxx" <hch@xxxxxx>, "bart.vanassche@xxxxxxxxxxx" <bart.vanassche@xxxxxxxxxxx>, Himanshu Madhani <himanshu.madhani@xxxxxxxxxx>, Nicholas Bellinger <nab@xxxxxxxxxxxxxxx> > Subject: [4.5-rc4 Regression] qla2xxx: Add irq affinity notification > >> Hello Quinn, >> >> A kernel bug report was opened against Ubuntu [0]. After a kernel >> bisect, it was found that reverting the following commit resolved this bug: >> >> commit cdb898c52d1dfad4b4800b83a58b3fe5d352edde >> Author: Quinn Tran <quinn.tran@xxxxxxxxxx> >> Date: Thu Dec 17 14:57:05 2015 -0500 >> >> qla2xxx: Add irq affinity notification >> >> >> However, the prior commit also required the following three commits to >> also be reverted: >> >> commit 5327c7dbd1a7fd980608f44789076a636e5ee5fc >> Author: Quinn Tran <quinn.tran@xxxxxxxxxx> >> Date: Wed Feb 10 18:59:14 2016 -0500 >> >> qla2xxx: use TARGET_SCF_USE_CPUID flag to indiate CPU Affinity >> >> commit 9095adaab8c1d82707e4e9961b6ad79b62f3361b >> Author: Quinn Tran <quinn.tran@xxxxxxxxxx> >> Date: Wed Feb 10 18:59:13 2016 -0500 >> >> target/transport: add flag to indicate CPU Affinity is observed >> >> commit fb3269baf4ecc2ce6d17d4eb537080035bdf6d5b >> Author: Quinn Tran <quinn.tran@xxxxxxxxxx> >> Date: Thu Dec 17 14:57:06 2015 -0500 >> >> qla2xxx: Add selective command queuing >> >> >> >> The regression was introduced as of v4.5-rc4. >> >> I was hoping to get your feedback, since you are the patch author. The >> dependant reverts all look like they are improving cpu affinity, which >> would likely impact performance. Do you thing there is a way forward >> instead of the reverts, or would it be best to submit a revert request? >> >> >> Thanks, >> >> Joe >> >> >> [0] http://pad.lv/1554003 >> >> -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
