Re: 9.99.38 panic - i915drm + EFI ?

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

Hi,

On Thu, Jan 16, 2020 at 06:14:40PM +0000, Chavdar Ivanov wrote:

> Today's update brought 9.99.38, which fails to boot on my HP Envy 17
> laptop with Intel 530 graphics and NVidia GeForce; latter not used. The
> system uses EFI boot and the panic happens the moment it has to switch
> the console in graphics mode. I managed to collect a dump; the trace is
> as follows:
> 
> ....
> 
> #1? 0xffffffff809fd663 in kern_reboot ()
> #2? 0xffffffff807c1ec3 in db_reboot_cmd ()
> #3? 0xffffffff807c26db in db_command ()
> #4? 0xffffffff807c2a46 in db_command_loop ()
> #5? 0xffffffff807c63ca in db_trap ()
> #6? 0xffffffff80220af5 in kdb_trap ()
> #7? 0xffffffff80225c66 in trap ()
> #8? 0xffffffff8021ed43 in alltraps ()
> #9? 0xffffffff8021f55d in breakpoint ()
> #10 0xffffffff80a3e380 in vpanic ()
> #11 0xffffffff80e85393 in kern_assert ()
> #12 0xffffffff809ba1ec in uvm_pagegetdirty ()
> #13 0xffffffff809ba218 in uvm_pagemarkdirty ()
> #14 0xffffffff80c0100e in intel_lr_context_deferred_alloc ()
> #15 0xffffffff80c01470 in logical_ring_init ()
> #16 0xffffffff80c016fd in intel_logical_rings_init ()
> #17 0xffffffff80b86359 in i915_gem_init ()
> #18 0xffffffff80b7b11d in i915_driver_load ()
> #19 0xffffffff8087f31b in drm_dev_register ()
> #20 0xffffffff806be10b in drm_pci_attach ()
> #21 0xffffffff80b757ab in i915drmkms_attach_real ()
> #22 0xffffffff80a20ebe in config_mountroot_thread ()
> #23 0xffffffff80209777 in lwp_trampoline ()
> #24 0x0000000000000000 in ?? ()

I see the problem.  DRM does not hold the appropriate locks.  I don't think
it needs to mark those pages dirty anyhow.  I'll fix it tomorrow.

Cheers,
Andrew