Hi,
I tried latest drm-fixes today and saw a lot of these: Fallout from ttm rework?
/Thomas
[ 298.404788] WARNING: CPU: 1 PID: 3839 at drivers/gpu/drm/ttm/ttm_bo.c:512 ttm_bo_release+0x2b5/0x300 [ttm] [ 298.404795] Modules linked in: nls_utf8 isofs rfcomm tun bridge stp llc ip6table_nat ip6table_mangle ip6table_raw ip6table_security iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 libcrc32c nf_defrag_ipv4 iptable_mangle iptable_raw iptable_security ip_set nfnetlink ip6table_filter ip6_tables iptable_filter cmac bnep vsock_loopback vmw_vsock_virtio_transport_common vmw_vsock_vmci_transport vsock snd_seq_midi snd_seq_midi_event intel_rapl_msr snd_ens1371 snd_ac97_codec ac97_bus vmw_balloon intel_rapl_common snd_seq rapl snd_pcm btusb btrtl btbcm btintel bluetooth joydev gameport snd_timer snd_rawmidi snd_seq_device rfkill snd ecdh_generic vmw_vmci ecc soundcore i2c_piix4 auth_rpcgss sunrpc ip_tables vmwgfx drm_kms_helper cec ttm e1000 crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel drm mptspi serio_raw scsi_transport_spi mptscsih mptbase ata_generic pata_acpi uas usb_storage fuse [ 298.404837] CPU: 1 PID: 3839 Comm: thunderbird Tainted: G W 5.12.0-rc2+ #42 [ 298.404839] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 07/29/2019 [ 298.404840] RIP: 0010:ttm_bo_release+0x2b5/0x300 [ttm] [ 298.404845] Code: e8 a0 f3 35 ce e9 da fd ff ff 49 8b 7e 90 b9 30 75 00 00 31 d2 be 01 00 00 00 e8 c6 17 36 ce 49 8b 46 e0 eb 9e 48 89 e8 eb 99 <0f> 0b 41 c7 86 94 00 00 00 00 00 00 00 49 8d 76 08 31 d2 4c 89 ef [ 298.404847] RSP: 0018:ffffb24a43ef3bd0 EFLAGS: 00010202 [ 298.404848] RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000000000001 [ 298.404850] RDX: 0000000000000001 RSI: 0000000000000246 RDI: ffffffffc03c50e8 [ 298.404851] RBP: ffff9ad4429f2620 R08: 0000000000000001 R09: ffff9ad4429f2000 [ 298.404852] R10: ffff9ad48664e090 R11: 0000000000000000 R12: ffff9ad4e71371d0 [ 298.404852] R13: ffff9ad4e7137000 R14: ffff9ad4e7137168 R15: ffff9ad48710f4c0 [ 298.404854] FS: 00007fc6d9ae4780(0000) GS:ffff9ad576e40000(0000) knlGS:0000000000000000 [ 298.404855] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 298.404857] CR2: 00007fc6c6740000 CR3: 00000001a4eac004 CR4: 00000000003706e0 [ 298.404864] Call Trace: [ 298.404866] vmw_resource_release+0x131/0x1f0 [vmwgfx] [ 298.404878] vmw_context_cotables_unref.isra.0+0x6f/0xa0 [vmwgfx] [ 298.404891] vmw_resource_release+0x16a/0x1f0 [vmwgfx] [ 298.404901] vmw_user_context_base_release+0x31/0x50 [vmwgfx] [ 298.404912] ttm_release_base+0x7f/0xc0 [vmwgfx] [ 298.404922] ttm_ref_object_release+0xde/0xf0 [vmwgfx] [ 298.404931] ttm_ref_object_base_unref+0x8e/0xb0 [vmwgfx] [ 298.404940] ? vmw_dx_context_unbind+0x1e0/0x1e0 [vmwgfx] [ 298.404951] drm_ioctl_kernel+0xaa/0xf0 [drm] [ 298.404974] drm_ioctl+0x20f/0x3a0 [drm] [ 298.404991] ? vmw_dx_context_unbind+0x1e0/0x1e0 [vmwgfx] [ 298.405003] ? selinux_file_ioctl+0x135/0x230 [ 298.405006] ? drm_version+0x90/0x90 [drm] [ 298.405023] vmw_generic_ioctl+0xab/0x150 [vmwgfx] [ 298.405033] __x64_sys_ioctl+0x83/0xb0 [ 298.405035] do_syscall_64+0x33/0x40 [ 298.405038] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 298.405041] RIP: 0033:0x7fc6d9be15db [ 298.405042] Code: 89 d8 49 8d 3c 1c 48 f7 d8 49 39 c4 72 b5 e8 1c ff ff ff 85 c0 78 ba 4c 89 e0 5b 5d 41 5c c3 f3 0f 1e fa b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 6d b8 0c 00 f7 d8 64 89 01 48 [ 298.405044] RSP: 002b:00007ffc8ce6de98 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 298.405046] RAX: ffffffffffffffda RBX: 00007ffc8ce6dee0 RCX: 00007fc6d9be15db [ 298.405048] RDX: 00007ffc8ce6dee0 RSI: 0000000040086448 RDI: 0000000000000007 [ 298.405049] RBP: 0000000040086448 R08: 0000000000000000 R09: 0000000000000000 [ 298.405050] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc6d98e0000 [ 298.405051] R13: 0000000000000007 R14: 00007fc6d98ea3b0 R15: 00007fc6c671f800 [ 298.405053] ---[ end trace c628fb3ea8b5aa96 ]---