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SubjectRE: Linux 5.10-rc4
Date
From: Linus Torvalds
> Sent: 16 November 2020 00:59
>
> All looks good, and nothing makes me go "uhhuh, 5.10 looks iffy". So
> go test, let's get this all solid and calmed down, and this will
> hopefully be one of those regular boring releases even if it's
> certainly not been on the smaller side...

I've got the 'splat' below during boot.
This is an 8-core C2758 Atom cpu using the on-board/cpu graphics.
User space is Ubuntu 20.04.

Additionally the X display has all the colours and alignment slightly
messed up.
5.9.0 was ok.
I'm just guessing the two issues are related.

David

[ 20.809891] WARNING: CPU: 0 PID: 973 at drivers/gpu/drm/drm_gem_vram_helper.c:284 drm_gem_vram_offset+0x35/0x40 [drm_vram_helper]
[ 20.821543] Modules linked in: nls_iso8859_1 dm_multipath scsi_dh_rdac scsi_dh_emc scsi_dh_alua ipmi_ssif intel_powerclamp coretemp kvm_intel kvm joydev input_leds ipmi_si intel_cstate ipmi_devintf ipmi_msghandler mac_hid sch_fq_codel parport_pc ppdev lp parport ip_tables x_tables autofs4 btrfs blake2b_generic zstd_compress raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx libcrc32c xor raid6_pq raid1 raid0 multipath linear ast drm_vram_helper drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops cec drm_ttm_helper ttm crct10dif_pclmul crc32_pclmul ghash_clmulni_intel gpio_ich drm aesni_intel hid_generic glue_helper crypto_simd igb usbhid cryptd ahci i2c_i801 hid libahci i2c_smbus lpc_ich dca i2c_ismt i2c_algo_bit
[ 20.887477] CPU: 0 PID: 973 Comm: gnome-shell Not tainted 5.10.0-rc4+ #78
[ 20.894274] Hardware name: Supermicro A1SAi/A1SRi, BIOS 1.1a 08/27/2015
[ 20.900896] RIP: 0010:drm_gem_vram_offset+0x35/0x40 [drm_vram_helper]
[ 20.907342] Code: 00 48 89 e5 85 c0 74 17 48 83 bf 78 01 00 00 00 74 18 48 8b 87 80 01 00 00 5d 48 c1 e0 0c c3 0f 0b 48 c7 c0 ed ff ff ff 5d c3 <0f> 0b 31 c0 5d c3 0f 1f 44 00 00 0f 1f 44 00 00 55 48 8b 87 18 06
[ 20.926100] RSP: 0018:ffff9f59811d3a68 EFLAGS: 00010246
[ 20.931339] RAX: 0000000000000002 RBX: ffff8b46861e20c0 RCX: ffffffffc032d600
[ 20.938479] RDX: ffff8b468f47a000 RSI: ffff8b46861e2000 RDI: ffff8b468f9acc00
[ 20.945622] RBP: ffff9f59811d3a68 R08: 0000000000000040 R09: ffff8b46864ce288
[ 20.952769] R10: 0000000000000000 R11: 0000000000000001 R12: ffff8b468f47a000
[ 20.959915] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8b468ad2bf00
[ 20.967057] FS: 00007f5b37ac5cc0(0000) GS:ffff8b49efc00000(0000) knlGS:0000000000000000
[ 20.975149] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 20.980904] CR2: 00007f5b3d093f00 CR3: 0000000103438000 CR4: 00000000001006f0
[ 20.988047] Call Trace:
[ 20.990506] ast_cursor_page_flip+0x22/0x100 [ast]
[ 20.995313] ast_cursor_plane_helper_atomic_update+0x46/0x70 [ast]
[ 21.001524] drm_atomic_helper_commit_planes+0xbd/0x220 [drm_kms_helper]
[ 21.008243] drm_atomic_helper_commit_tail_rpm+0x3a/0x70 [drm_kms_helper]
[ 21.015062] commit_tail+0x99/0x130 [drm_kms_helper]
[ 21.020050] drm_atomic_helper_commit+0x123/0x150 [drm_kms_helper]
[ 21.026269] drm_atomic_commit+0x4a/0x50 [drm]
[ 21.030737] drm_atomic_helper_update_plane+0xe7/0x140 [drm_kms_helper]
[ 21.037384] __setplane_atomic+0xcc/0x110 [drm]
[ 21.041953] drm_mode_cursor_universal+0x13e/0x260 [drm]
[ 21.047299] drm_mode_cursor_common+0xef/0x220 [drm]
[ 21.052287] ? alloc_set_pte+0x10d/0x6d0
[ 21.056244] ? drm_mode_cursor_ioctl+0x60/0x60 [drm]
[ 21.061242] drm_mode_cursor2_ioctl+0xe/0x10 [drm]
[ 21.066067] drm_ioctl_kernel+0xae/0xf0 [drm]
[ 21.070455] drm_ioctl+0x241/0x3f0 [drm]
[ 21.074415] ? drm_mode_cursor_ioctl+0x60/0x60 [drm]
[ 21.079401] __x64_sys_ioctl+0x91/0xc0
[ 21.083167] do_syscall_64+0x38/0x90
[ 21.086755] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 21.091813] RIP: 0033:0x7f5b3cf1350b
[ 21.095403] Code: 0f 1e fa 48 8b 05 85 39 0d 00 64 c7 00 26 00 00 00 48 c7 c0 ff ff ff ff c3 66 0f 1f 44 00 00 f3 0f 1e fa b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 55 39 0d 00 f7 d8 64 89 01 48
[ 21.114154] RSP: 002b:00007ffef1966588 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[ 21.121730] RAX: ffffffffffffffda RBX: 00007ffef19665c0 RCX: 00007f5b3cf1350b
[ 21.128870] RDX: 00007ffef19665c0 RSI: 00000000c02464bb RDI: 0000000000000009
[ 21.136013] RBP: 00000000c02464bb R08: 0000000000000040 R09: 0000000000000004
[ 21.143157] R10: 0000000000000002 R11: 0000000000000246 R12: 0000561ec9d10060
[ 21.150295] R13: 0000000000000009 R14: 0000561eca2cc9a0 R15: 0000000000000040

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