> -----Original Message----- > From: Greg KH [mailto:greg@xxxxxxxxx] > Sent: Tuesday, June 04, 2013 6:44 PM > To: Fengguang Wu > Cc: KY Srinivasan; devel@xxxxxxxxxxxxxxxxxxxxxx; Greg Kroah-Hartman; linux- > kernel@xxxxxxxxxxxxxxx > Subject: Re: [hv] BUG: kernel freezes after [ 13.356381] PCI: CLS 0 bytes, default > 64 > > On Tue, Jun 04, 2013 at 10:15:36PM +0800, Fengguang Wu wrote: > > Greetings, > > > > I got the below dmesg (kernel freezes at the end of it) and the first bad commit > is > > > > commit cf6a2eacbcb2593b5b91d0817915c4f0464bb534 > > Author: K. Y. Srinivasan <kys@xxxxxxxxxxxxx> > > Date: Thu Dec 1 09:59:34 2011 -0800 > > > > drivers: hv: Don't OOPS when you cannot init vmbus > > > > The hv vmbus driver was causing an OOPS since it was trying to register > drivers > > on top of the bus even if initialization of the bus has failed for some > > reason (such as the odd chance someone would run a hv enabled kernel in a > > non-hv environment). > > > > Signed-off-by: Sasha Levin <levinsasha928@xxxxxxxxx> > > Signed-off-by: K. Y. Srinivasan <kys@xxxxxxxxxxxxx> > > Cc: stable <stable@xxxxxxxxxxxxxxx> > > Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx> > > > > [ 13.356381] PCI: CLS 0 bytes, default 64 > > Ick, not good. K.Y., any reason why I shouldn't just revert this? I have asked Wu for details. Examining the relevant VMBUS code, I cannot see how this patch could be responsible for the freeze. For what it is worth looking at dmesg, it appears that we are not running on a Hypervisor. There was a bug in this patch and that was fixed a few days later: commit 8f257a142fc3868d69de3f996b95d7bdbc509560 Author: K. Y. Srinivasan <kys@xxxxxxxxxxxxx> Date: Tue Dec 27 13:49:37 2011 -0800 Drivers:hv: Fix a bug in vmbus_driver_unregister() The function vmbus_exists() was introduced recently to deal with cases where the vmbus driver failed to initialize and yet other Hyper-V drivers attempted to register with the vmbus bus driver. This patch introduced a bug where vmbus_driver_unregister() would fail to unregister the driver. This patch fixes the problem. Signed-off-by: K. Y. Srinivasan <kys@xxxxxxxxxxxxx> Signed-off-by: Fuzhou Chen <fuzhouch@xxxxxxxxxxxxx> Cc: Sasha Levin <levinsasha928@xxxxxxxxx> Cc: stable <stable@xxxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx> Regards, K. Y > > thanks, > > greg k-h > _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/devel
