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

From: Pete Wright via freebsd-x11 <freebsd-x11_at_freebsd.org>
Date: Sat, 11 Sep 2021 16:53:21 UTC 

On 9/11/21 8:17 AM, Vladimir Kondratyev wrote:
> 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
>
Thanks for the heads up on that.  Just reverted on my system and it 
seems better on my end now.  Let me know if there is any additional 
debugging i can do to fix the original sleep lock issue.

-pete

-- 
Pete Wright
pete@nomadlogic.org
@nomadlogicLA