On Wed, 2017-03-08 at 15:20 +0000, Bart Van Assche wrote: > On Tue, 2017-03-07 at 23:34 -0800, Nicholas A. Bellinger wrote: > > Btw, the regression reported here in v2: > > > > http://www.spinics.net/lists/target-devel/msg14348.html > > > > is completely different from what you've reported here. > > The call traces differ but the root cause is probably the same. > > > It would be useful to explain how you reproduced this, instead of just > > posting backtrace with zero context..? > > > > Can we at least identify which patch in this series is causing this..? > > > > Also, I assume you are running this on stock v4.11-rc1 with only this > > qla2xxx series applied, and not all of your other stuff, right..? > > The test I ran against v4.11-rc1 + this patch series is to start LIO on a > system equipped with two back-to-back connected QLogic FC HBAs (no switch > inbetween), to load the tcm_qla2xxx driver, to configure LUNs and to wait > until the SCSI stack reports that these LUNs have appeared. What I see in > the lsscsi output with both v2 and v3 of this patch series is that these > LUNs appear briefly and then disappear and that a little bit later the > kernel reports that a hang occurred. Without this patch series the LUNs are > detected and do not disappear automatically and no hang is reported. I > think the next step is that Cavium verifies whether they can reproduce this > behavior and if they can reproduce it to run a bisect. BTW, since there are > login-related patches in this series I wouldn't be surprised if one of these > patches introduced the regression. > Good. Thanks for confirming it's with a PTP setup, and atop stock v4.11-rc1 with this series.
