Re: CVS commit: src/sys [freeze on boot]

[Andrew Doran <ad%netbsd.org@localhost>]

Thanks.  I can reproduce a hang on boot in qemu.  It's hanging starting
init, waiting on "needbuf".  Investigating now.

Andrew

On Mon, Jan 20, 2020 at 04:12:45PM +0000, Patrick Welche wrote:
> On Mon, Jan 20, 2020 at 12:51:00PM +0000, Andrew Doran wrote:
> > This also happened the last time I touched rw_downgrade(), and I backed out
> > the change then, but both times I don't see the bug.  I have some questions:
> > 
> > - Are you running DIAGNOSTIC and/or LOCKDEBUG?  I would be very interested
> >   to see what happens with a LOCKDEBUG kernel here.
> 
> One worked with the addition of LOCKDEBUG. The other didn't, but it seems
> to be unrelated:
> 
> db{0}> show panic
> Panic string: mutex_vector_enter,510: uninitialized lock (lock=0xffffbd012366609
> 0, from=ffffffff8033dc9d)
> bt
> breakpoint() at netbsd:breakpoint+0x5
> vpanic() at netbsd:vpanic+0x178
> snprintf() at netbsd:snprintf
> lockdebug_wantlock() at netbsd:lockdebug_wantlock+0x166
> mutex_enter() at netbsd:mutex_enter+0x37c
> ixgbe_getext() at netbsd:ixgbe_getext+0x1d
> ixgbe_jcl_freeall.isra.0() at netbsd:ixgbe_jcl_freeall.isra.0+0xd6
> ixgbe_jcl_destroy() at netbsd:ixgbe_jcl_destroy+0x14
> ixgbe_free_receive_structures() at netbsd:ixgbe_free_receive_structures+0x11b
> ixgbe_attach() at netbsd:ixgbe_attach+0x2b0a
> config_attach_loc() at netbsd:config_attach_loc+0x1a8
> config_found_sm_loc() at netbsd:config_found_sm_loc+0x4d
> pci_probe_device() at netbsd:pci_probe_device+0x586
> pci_enumerate_bus() at netbsd:pci_enumerate_bus+0x1b7
> pcirescan() at netbsd:pcirescan+0x4e
> pciattach() at netbsd:pciattach+0x186
> config_attach_loc() at netbsd:config_attach_loc+0x1a8
> config_found_sm_loc() at netbsd:config_found_sm_loc+0x4d
> ppbattach() at netbsd:ppbattach+0x1c5
> config_attach_loc() at netbsd:config_attach_loc+0x1a8
> config_found_sm_loc() at netbsd:config_found_sm_loc+0x4d
> pci_probe_device() at netbsd:pci_probe_device+0x586
> pci_enumerate_bus() at netbsd:pci_enumerate_bus+0x1b7
> pcirescan() at netbsd:pcirescan+0x4e
> pciattach() at netbsd:pciattach+0x186
> config_attach_loc() at netbsd:config_attach_loc+0x1a8
> config_found_sm_loc() at netbsd:config_found_sm_loc+0x4d
> ppbattach() at netbsd:ppbattach+0x1c5
> config_attach_loc() at netbsd:config_attach_loc+0x1a8
> config_found_sm_loc() at netbsd:config_found_sm_loc+0x4d
> pci_probe_device() at netbsd:pci_probe_device+0x586
> pci_enumerate_bus() at netbsd:pci_enumerate_bus+0x1b7
> pcirescan() at netbsd:pcirescan+0x4e
> pciattach() at netbsd:pciattach+0x186
> config_attach_loc() at netbsd:config_attach_loc+0x1a8
> config_found_sm_loc() at netbsd:config_found_sm_loc+0x4d
> ppbattach() at netbsd:ppbattach+0x1c5
> config_attach_loc() at netbsd:config_attach_loc+0x1a8
> config_found_sm_loc() at netbsd:config_found_sm_loc+0x4d
> pci_probe_device() at netbsd:pci_probe_device+0x586
> pci_enumerate_bus() at netbsd:pci_enumerate_bus+0x1b7
> pcirescan() at netbsd:pcirescan+0x4e
> pciattach() at netbsd:pciattach+0x186
> config_attach_loc() at netbsd:config_attach_loc+0x1a8
> config_found_sm_loc() at netbsd:config_found_sm_loc+0x4d
> mp_pci_scan() at netbsd:mp_pci_scan+0xa4
> amd64_mainbus_attach() at netbsd:amd64_mainbus_attach+0x237
> mainbus_attach() at netbsd:mainbus_attach+0x70
> config_attach_loc() at netbsd:config_attach_loc+0x1a8
> cpu_configure() at netbsd:cpu_configure+0x2b
> main() at netbsd:main+0x311
> 
> Cheers,
> 
> Patrick