Quoting Chunming Zhou (2018-10-15 09:55:48) > This patch is for VK_KHR_timeline_semaphore extension, semaphore is called syncobj in kernel side: > This extension introduces a new type of syncobj that has an integer payload > identifying a point in a timeline. Such timeline syncobjs support the > following operations: > * CPU query - A host operation that allows querying the payload of the > timeline syncobj. > * CPU wait - A host operation that allows a blocking wait for a > timeline syncobj to reach a specified value. > * Device wait - A device operation that allows waiting for a > timeline syncobj to reach a specified value. > * Device signal - A device operation that allows advancing the > timeline syncobj to a specified value. Spinlock recursion: https://bugs.freedesktop.org/show_bug.cgi?id=108490 <6> [363.585915] [IGT] syncobj_wait: executing <6> [363.646916] [IGT] syncobj_wait: starting subtest wait-for-submit-delayed-submit <4> [363.752517] <4> [363.752542] ============================================ <4> [363.752561] WARNING: possible recursive locking detected <4> [363.752582] 4.19.0-rc8-CI-CI_DRM_5006+ #1 Tainted: G U <4> [363.752602] -------------------------------------------- <4> [363.752621] syncobj_wait/2297 is trying to acquire lock: <4> [363.752641] 0000000029228054 (&(&syncobj->lock)->rlock){+.+.}, at: drm_syncobj_garbage_collection+0x25/0x140 <4> [363.752699] \x0abut task is already holding lock: <4> [363.752721] 0000000029228054 (&(&syncobj->lock)->rlock){+.+.}, at: drm_syncobj_replace_fence+0x1b6/0x2c0 <4> [363.752768] \x0aother info that might help us debug this: <4> [363.752791] Possible unsafe locking scenario:\x0a <4> [363.752812] CPU0 <4> [363.752824] ---- <4> [363.752835] lock(&(&syncobj->lock)->rlock); <4> [363.752856] lock(&(&syncobj->lock)->rlock); <4> [363.752877] \x0a *** DEADLOCK ***\x0a <4> [363.752905] May be due to missing lock nesting notation\x0a <4> [363.752932] 1 lock held by syncobj_wait/2297: <4> [363.752949] #0: 0000000029228054 (&(&syncobj->lock)->rlock){+.+.}, at: drm_syncobj_replace_fence+0x1b6/0x2c0 <4> [363.753001] \x0astack backtrace: <4> [363.753030] CPU: 2 PID: 2297 Comm: syncobj_wait Tainted: G U 4.19.0-rc8-CI-CI_DRM_5006+ #1 <4> [363.753060] Hardware name: Google Caroline/Caroline, BIOS MrChromebox 08/27/2018 <4> [363.753083] Call Trace: <4> [363.753109] dump_stack+0x67/0x9b <4> [363.753136] __lock_acquire+0xc67/0x1b50 <4> [363.753164] ? deactivate_slab.isra.26+0x7a4/0x7e0 <4> [363.753203] ? __lock_acquire+0x3c8/0x1b50 <4> [363.753242] ? __wake_up_common_lock+0x5e/0xb0 <4> [363.753285] ? lock_acquire+0xa6/0x1c0 <4> [363.753306] lock_acquire+0xa6/0x1c0 <4> [363.753334] ? drm_syncobj_garbage_collection+0x25/0x140 <4> [363.753365] _raw_spin_lock+0x2a/0x40 <4> [363.753392] ? drm_syncobj_garbage_collection+0x25/0x140 <4> [363.753419] drm_syncobj_garbage_collection+0x25/0x140 <4> [363.753450] drm_syncobj_search_fence+0x38/0x200 <4> [363.753478] ? drm_syncobj_replace_fence+0x1b6/0x2c0 <4> [363.753509] syncobj_wait_syncobj_func+0x11/0x20 <4> [363.753536] drm_syncobj_replace_fence+0x1f8/0x2c0 <4> [363.753561] ? drm_syncobj_handle_to_fd_ioctl+0x170/0x170 <4> [363.753585] drm_syncobj_fd_to_handle_ioctl+0x120/0x1d0 <4> [363.753609] ? drm_syncobj_handle_to_fd_ioctl+0x170/0x170 <4> [363.753638] drm_ioctl_kernel+0x81/0xf0 <4> [363.753665] drm_ioctl+0x2e6/0x3a0 <4> [363.753686] ? drm_syncobj_handle_to_fd_ioctl+0x170/0x170 <4> [363.753717] ? lock_acquire+0xa6/0x1c0 <4> [363.753743] do_vfs_ioctl+0xa0/0x6d0 <4> [363.753769] ? __fget+0xfc/0x1e0 <4> [363.753792] ksys_ioctl+0x35/0x60 <4> [363.753816] __x64_sys_ioctl+0x11/0x20 <4> [363.753840] do_syscall_64+0x55/0x190 <4> [363.753866] entry_SYSCALL_64_after_hwframe+0x49/0xbe <4> [363.753890] RIP: 0033:0x7f0d84f9a5d7 <4> [363.753911] Code: b3 66 90 48 8b 05 b1 48 2d 00 64 c7 00 26 00 00 00 48 c7 c0 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 81 48 2d 00 f7 d8 64 89 01 48 <4> [363.753959] RSP: 002b:00007f0d79804ac8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 <4> [363.753990] RAX: ffffffffffffffda RBX: 00007f0d74000b20 RCX: 00007f0d84f9a5d7 <4> [363.754016] RDX: 00007f0d79804b50 RSI: 00000000c01064c2 RDI: 0000000000000005 <4> [363.754040] RBP: 00007f0d79804b50 R08: 0000000000000000 R09: 000000000000001e <4> [363.754064] R10: 0000000000000054 R11: 0000000000000246 R12: 00000000c01064c2 <4> [363.754088] R13: 0000000000000005 R14: 00007f0d74000b20 R15: 000055ab44e2c3f8 -Chris _______________________________________________ amd-gfx mailing list amd-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/amd-gfx
