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

On 9/12/21 1:10 PM, Vladimir Kondratyev wrote:
>
> Could you obtain a crashdump from drm-kmod compiled with -O0 option
> added to CFLAGS? Following command will apply -O0 to build:
>
> $ make clean
> $ CFLAGS='-g -O0' make
>

hopefully this backtrace has the missing info:
(kgdb) bt
#0  __curthread () at 
/usr/home/pete/git/freebsd/sys/amd64/include/pcpu_aux.h:55
#1  doadump (textdump=textdump@entry=0) at 
/usr/home/pete/git/freebsd/sys/kern/kern_shutdown.c:399
#2  0xffffffff804cf8fa in db_dump (dummy=<optimized out>, 
dummy2=<unavailable>, dummy3=<unavailable>, dummy4=<unavailable>)
     at /usr/home/pete/git/freebsd/sys/ddb/db_command.c:575
#3  0xffffffff804cf7b2 in db_command (last_cmdp=<optimized out>, 
cmd_table=<optimized out>, dopager=dopager@entry=1) at 
/usr/home/pete/git/freebsd/sys/ddb/db_command.c:482
#4  0xffffffff804cf42d in db_command_loop () at 
/usr/home/pete/git/freebsd/sys/ddb/db_command.c:535
#5  0xffffffff804d2ba6 in db_trap (type=<optimized out>, code=<optimized 
out>) at /usr/home/pete/git/freebsd/sys/ddb/db_main.c:270
#6  0xffffffff80c73547 in kdb_trap (type=type@entry=3, 
code=code@entry=0, tf=tf@entry=0xfffffe011ced0d00) at 
/usr/home/pete/git/freebsd/sys/kern/subr_kdb.c:733
#7  0xffffffff810ebe83 in trap (frame=0xfffffe011ced0d00) at 
/usr/home/pete/git/freebsd/sys/amd64/amd64/trap.c:609
#8  <signal handler called>
#9  kdb_enter (why=0xffffffff812e8d97 "panic", msg=<optimized out>) at 
/usr/home/pete/git/freebsd/sys/kern/subr_kdb.c:506
#10 0xffffffff80c259e8 in vpanic (fmt=0xffffffff8121692d "acquiring 
blockable sleep lock with spinlock or critical section held (%s) %s @ 
%s:%d", ap=<optimized out>,
     ap@entry=0xfffffe011ced0e70) at 
/usr/home/pete/git/freebsd/sys/kern/kern_shutdown.c:907
#11 0xffffffff80c25773 in panic (fmt=0xffffffff81e9d9c0 <cnputs_mtx> 
"KN*\201\377\377\377\377") at 
/usr/home/pete/git/freebsd/sys/kern/kern_shutdown.c:843
#12 0xffffffff80c963b8 in witness_checkorder (lock=0xfffff80004818f88, 
flags=9, file=<optimized out>,
     file@entry=0xffffffff812479c6 
"/usr/home/pete/git/freebsd/sys/compat/linuxkpi/common/src/linux_work.c", 
line=line@entry=105, interlock=interlock@entry=0x0)
     at /usr/home/pete/git/freebsd/sys/kern/subr_witness.c:1135
#13 0xffffffff80c01c44 in __mtx_lock_flags (c=0xfffff80004818fa0, 
opts=0, file=0xffffffff812479c6 
"/usr/home/pete/git/freebsd/sys/compat/linuxkpi/common/src/linux_work.c",
     line=105) at /usr/home/pete/git/freebsd/sys/kern/kern_mutex.c:278
#14 0xffffffff80e9adea in linux_work_exec_unblock 
(work=0xfffff801be7f1998) at 
/usr/home/pete/git/freebsd/sys/compat/linuxkpi/common/src/linux_work.c:105
#15 linux_queue_work_on (cpu=<optimized out>, wq=0xfffff80004818f80, 
work=0xfffff801be7f1998) at 
/usr/home/pete/git/freebsd/sys/compat/linuxkpi/common/src/linux_work.c:150
#16 0xffffffff84200e5c in active_retire () from /boot/modules/i915kms.ko
#17 0xffffffff842019de in node_retire () from /boot/modules/i915kms.ko
#18 0xffffffff84148965 in dma_fence_signal_locked () from 
/boot/modules/linuxkpi_gplv2.ko
#19 0xffffffff84148ca3 in dma_fence_signal () from 
/boot/modules/linuxkpi_gplv2.ko
#20 0xffffffff8414a9de in dma_fence_is_signaled () from 
/boot/modules/linuxkpi_gplv2.ko
#21 0xffffffff8414aadc in dma_resv_add_shared_fence () from 
/boot/modules/linuxkpi_gplv2.ko
#22 0xffffffff84246a02 in i915_vma_move_to_active () from 
/boot/modules/i915kms.ko
#23 0xffffffff843cfbe1 in eb_move_to_gpu () from /boot/modules/i915kms.ko
#24 0xffffffff843c93c5 in eb_submit () from /boot/modules/i915kms.ko
#25 0xffffffff843c7f5a in i915_gem_do_execbuffer () from 
/boot/modules/i915kms.ko
#26 0xffffffff843c83ab in i915_gem_execbuffer2_ioctl () from 
/boot/modules/i915kms.ko
#27 0xffffffff8448c6d4 in drm_ioctl_kernel () from /boot/modules/drm.ko
#28 0xffffffff8448ce92 in drm_ioctl () from /boot/modules/drm.ko
#29 0xffffffff80e8ab07 in linux_file_ioctl_sub (fp=<optimized out>, 
filp=0xfffff8019ecb9300, fop=<optimized out>, cmd=<optimized out>, 
data=<optimized out>,
     td=<optimized out>) at 
/usr/home/pete/git/freebsd/sys/compat/linuxkpi/common/src/linux_compat.c:985
#30 linux_file_ioctl (fp=<optimized out>, cmd=<optimized out>, 
data=<optimized out>, cred=<optimized out>, td=0xfffffe011d7d0740)
     at 
/usr/home/pete/git/freebsd/sys/compat/linuxkpi/common/src/linux_compat.c:1601
#31 0xffffffff80c9bd82 in fo_ioctl (fp=<optimized out>, com=2151703657, 
data=0x1c200001, active_cred=0x1, td=0xfffffe011d7d0740)
     at /usr/home/pete/git/freebsd/sys/sys/file.h:360
#32 kern_ioctl (td=<optimized out>, td@entry=0xfffffe011d7d0740, 
fd=<optimized out>, com=<optimized out>, com@entry=2151703657,
     data=0x1c200001 <error: Cannot access memory at address 
0x1c200001>, data@entry=0xfffffe011ced1910 "") at 
/usr/home/pete/git/freebsd/sys/kern/sys_generic.c:803
#33 0xffffffff80c9bad4 in sys_ioctl (td=0xfffffe011d7d0740, 
uap=0xfffffe011d7d0b30) at 
/usr/home/pete/git/freebsd/sys/kern/sys_generic.c:711
#34 0xffffffff810ecc5e in syscallenter (td=<optimized out>) at 
/usr/home/pete/git/freebsd/sys/amd64/amd64/../../kern/subr_syscall.c:189
--Type <RET> for more, q to quit, c to continue without paging--
#35 amd64_syscall (td=0xfffffe011d7d0740, traced=0) at 
/usr/home/pete/git/freebsd/sys/amd64/amd64/trap.c:1191
#36 <signal handler called>
#37 0x000000080f1ae3ca in ?? ()


-p

-- 
Pete Wright
pete@nomadlogic.org
@nomadlogicLA