Am 25.03.20 um 12:03 schrieb Nirmoy:
On 3/25/20 10:23 AM, Pan, Xinhui wrote:
2020年3月25日 15:48，Koenig, Christian <Christian.Koenig@xxxxxxx> 写道：
Am 25.03.20 um 06:47 schrieb xinhui pan:
Hit panic during GPU recovery test. drm_sched_entity_select_rq might
set NULL to rq. So add a check like drm_sched_job_init does.
NAK, the rq should never be set to NULL in the first place.
How did that happened?
well, I have not check the details.
but just got the call trace below.
looks like sched is not ready, and drm_sched_entity_select_rq set
entity->rq to NULL.
in the next amdgpu_vm_sdma_commit, hit panic when we deference
entity->rq.
"drm/amdgpu: stop disable the scheduler during HW fini" from Christian
should've fix it already. But
I can't find that commit in brahma/amd-staging-drm-next.
Yeah, my fault. I actually forgot to push it.
Should be fixed by now,
Christian.
Regards,
Nirmoy
297567 [ 44.667677] amdgpu 0000:03:00.0: GPU reset begin!
297568 [ 44.929047] [drm] scheduler sdma0 is not ready, skipping
297569 [ 44.929048] [drm] scheduler sdma1 is not ready, skipping
297570 [ 44.934608] [drm:amdgpu_gem_va_ioctl [amdgpu]] *ERROR*
Couldn't update BO_VA (-2)
297571 [ 44.947941] BUG: kernel NULL pointer dereference, address:
0000000000000038
297572 [ 44.955132] #PF: supervisor read access in kernel mode
297573 [ 44.960451] #PF: error_code(0x0000) - not-present page
297574 [ 44.965714] PGD 0 P4D 0
297575 [ 44.968331] Oops: 0000 [#1] SMP PTI
297576 [ 44.971911] CPU: 7 PID: 2496 Comm: gnome-shell Tainted:
G W 5.4.0-rc7+ #1
297577 [ 44.980221] Hardware name: System manufacturer System
Product Name/Z170-A, BIOS 1702 01/28/2016
297578 [ 44.989177] RIP: 0010:amdgpu_vm_sdma_commit+0x55/0x190
[amdgpu]
297579 [ 44.995242] Code: 47 20 80 7f 10 00 4c 8b a0 88 01 00 00 48
8b 47 08 4c 8d a8 70 01 00 00 75 07 4c 8d a8 88 02 00 00 49 8b 45 10
41 8b 54 24 08 <48> 8b 40 38 85 d2 48 8d b8 30 ff ff f f 0f 84
06 01 00 00 48 8b 80
297580 [ 45.014931] RSP: 0018:ffffb66e008839d0 EFLAGS: 00010246
297581 [ 45.020504] RAX: 0000000000000000 RBX: ffffb66e00883a30
RCX: 0000000000100400
297582 [ 45.028062] RDX: 000000000000003c RSI: ffff8df123662138
RDI: ffffb66e00883a30
297583 [ 45.035662] RBP: ffffb66e00883a00 R08: ffffb66e0088395c
R09: ffffb66e00883960
297584 [ 45.043298] R10: 0000000000100240 R11: 0000000000000035
R12: ffff8df1425385e8
297585 [ 45.050916] R13: ffff8df13cfd1288 R14: ffff8df123662138
R15: ffff8df13cfd1000
297586 [ 45.058524] FS: 00007fcc8f6b2100(0000)
GS:ffff8df15e380000(0000) knlGS:0000000000000000
297587 [ 45.067114] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
297588 [ 45.073206] CR2: 0000000000000038 CR3: 0000000641fb6006
CR4: 00000000003606e0
297589 [ 45.080791] DR0: 0000000000000000 DR1: 0000000000000000
DR2: 0000000000000000
297590 [ 45.088277] DR3: 0000000000000000 DR6: 00000000fffe0ff0
DR7: 0000000000000400
297591 [ 45.095773] Call Trace:
297592 [ 45.098354] amdgpu_vm_bo_update_mapping+0x1c1/0x1f0 [amdgpu]
297593 [ 45.104427] ? mark_held_locks+0x4d/0x80
297594 [ 45.108682] amdgpu_vm_bo_update+0x3b7/0x960 [amdgpu]
297595 [ 45.114049] ? rcu_read_lock_sched_held+0x4f/0x80
297596 [ 45.119111] amdgpu_gem_va_ioctl+0x4f3/0x510 [amdgpu]
297597 [ 45.124495] ? amdgpu_gem_va_map_flags+0x70/0x70 [amdgpu]
297598 [ 45.130250] drm_ioctl_kernel+0xb0/0x100 [drm]
297599 [ 45.134988] ? amdgpu_gem_va_map_flags+0x70/0x70 [amdgpu]
297600 [ 45.140742] ? drm_ioctl_kernel+0xb0/0x100 [drm]
297601 [ 45.145622] drm_ioctl+0x389/0x450 [drm]
297602 [ 45.149804] ? amdgpu_gem_va_map_flags+0x70/0x70 [amdgpu]
297603 [ 45.155551] ? trace_hardirqs_on+0x3b/0xf0
297604 [ 45.159892] amdgpu_drm_ioctl+0x4f/0x80 [amdgpu]
297605 [ 45.172104] do_vfs_ioctl+0xa9/0x6f0
297606 [ 45.175909] ? tomoyo_file_ioctl+0x19/0x20
297607 [ 45.180241] ksys_ioctl+0x75/0x80
297608 [ 45.183760] ? do_syscall_64+0x17/0x230
297609 [ 45.187833] __x64_sys_ioctl+0x1a/0x20
297610 [ 45.191846] do_syscall_64+0x5f/0x230
297611 [ 45.195764] entry_SYSCALL_64_after_hwframe+0x49/0xbe
297612 [ 45.201126] RIP: 0033:0x7fcc8c7725d7
Regards,
Christian.
Cc: Christian König <christian.koenig@xxxxxxx>
Cc: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: Felix Kuehling <Felix.Kuehling@xxxxxxx>
Signed-off-by: xinhui pan <xinhui.pan@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_vm_sdma.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm_sdma.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm_sdma.c
index cf96c335b258..d30d103e48a2 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm_sdma.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm_sdma.c
@@ -95,6 +95,8 @@ static int amdgpu_vm_sdma_commit(struct
amdgpu_vm_update_params *p,
int r;
entity = p->direct ? &p->vm->direct : &p->vm->delayed;
+ if (!entity->rq)
+ return -ENOENT;
ring = container_of(entity->rq->sched, struct amdgpu_ring,
sched);
WARN_ON(ib->length_dw == 0);
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