Re: Panic on drm-devel v5.5.19.g20210909

On 11.09.2021 02:53, Pete Wright via freebsd-x11 wrote:
> hello,
> i got the following panic after upgrading my current laptop to
> drm-devel-v5.5.19.g20210909 (3df6598adf625a18a7c762b2d48b4c3dd7925838):
> 
> panic: acquiring blockable sleep lock with spinlock or critical section
> held (sleep mutex) linux_wq_exec @
> /usr/home/pete/git/freebsd/sys/compat/linuxkpi/common/src/linux_work.c:105
> cpuid = 5
> time = 1631315668
> KDB: stack backtrace:
> db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame
> 0xfffffe011d086060
> vpanic() at vpanic+0x187/frame 0xfffffe011d0860c0
> panic() at panic+0x43/frame 0xfffffe011d086120
> witness_checkorder() at witness_checkorder+0xe78/frame 0xfffffe011d0862f0
> __mtx_lock_flags() at __mtx_lock_flags+0x94/frame 0xfffffe011d086340
> linux_queue_work_on() at linux_queue_work_on+0x9a/frame 0xfffffe011d086380
> dma_fence_signal() at dma_fence_signal+0xc0/frame 0xfffffe011d0863d0
> dma_resv_add_shared_fence() at dma_resv_add_shared_fence+0x96/frame
> 0xfffffe011d086420
> i915_vma_move_to_active() at i915_vma_move_to_active+0x7e/frame
> 0xfffffe011d086460
> i915_gem_do_execbuffer() at i915_gem_do_execbuffer+0x13d7/frame
> 0xfffffe011d086670
> i915_gem_execbuffer2_ioctl() at i915_gem_execbuffer2_ioctl+0x195/frame
> 0xfffffe011d0866e0
> drm_ioctl_kernel() at drm_ioctl_kernel+0x72/frame 0xfffffe011d086730
> drm_ioctl() at drm_ioctl+0x2bf/frame 0xfffffe011d086820
> linux_file_ioctl() at linux_file_ioctl+0x297/frame 0xfffffe011d086880
> kern_ioctl() at kern_ioctl+0x202/frame 0xfffffe011d0868f0
> sys_ioctl() at sys_ioctl+0x124/frame 0xfffffe011d0869c0
> amd64_syscall() at amd64_syscall+0x12e/frame 0xfffffe011d086af0
> fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe011d086af0
> --- syscall (54, FreeBSD ELF64, sys_ioctl), rip = 0x80f1ae3ca, rsp =
> 0x7fffffffc8d8, rbp = 0x7fffffffc970 ---
> KDB: enter: panic
> 
> 
> I have a core and and additional info if that'll help debug this issue. 
> it happened three times while doing normal web+shell work.  i've
> reverted to the commit previous this one and it looks like the system no
> longer panic's.
> 
> -pete
> 

Try to revert this commit:
https://github.com/freebsd/drm-kmod/commit/787ffa8c48ecd02310ce2ec27c4b84d1898201e5

-- 
WBR
Vladimir Kondratyev