I haven't checked my bugzilla.kernel.org mail for a long time, so I missed the reopen of bug #30072. On Wed 29-06-11 13:40:03, Andrew Morton wrote: > > (switched to email. Please respond via emailed reply-to-all, not via the > bugzilla web interface). > > On Tue, 28 Jun 2011 15:37:08 GMT > bugzilla-daemon@xxxxxxxxxxxxxxxxxxx wrote: > > > https://bugzilla.kernel.org/show_bug.cgi?id=38462 > > > > Summary: USB<->serial (pl2303) 100% CPU usage loop in 2.6.39.2 > > (w/ bisection) > > Product: Drivers > > Version: 2.5 > > Kernel Version: 2.6.39.2 > > Platform: All > > OS/Version: Linux > > Tree: Mainline > > Status: NEW > > Severity: high > > Priority: P1 > > Component: USB > > AssignedTo: greg@xxxxxxxxx > > ReportedBy: akwatts@xxxxxxxxx > > Regression: Yes > > > > > > Commit d14fc1a74e846d7851f24fc9519fe87dc12a1231 (introduced in 2.6.37.1) causes > > userspace dialers (ppp+wvdial) to sometimes enter a 100% CPU utilization loop > > on disconnect -> connect cycles with a pl2303-driven Trendnet (tu-s9) > > USB-serial adapter and US Robotics external 56K modem. > > > > commit d14fc1a74e846d7851f24fc9519fe87dc12a1231 > > Author: Libor Pechacek <lpechacek@xxxxxxx> > > Date: Fri Jan 14 14:30:21 2011 +0100 > > USB: serial: handle Data Carrier Detect changes > > > > I have not been able to systematically reproduce except by > > connect->disconnect->(turn modem off and back on)->connect. > > > > The original bug report (bug #30072), which contains a lot more background > > including an strace of the runaway process, seems to have fallen off the radar > > screen because it stayed as INSUFFICIENT_DATA for too long (this was my fault). I'm on the bug and review the logs and configs provided. > > This report reflects that the problem remains in the 2.6.39.x tree (tested > > through 2.6.39.2) Libor -- Libor Pechacek SUSE L3 Team, Prague -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
