13229 2019-03-18 19:48:55 +0000 ttm_bo_vm_open kernel warning 2021-01-15 01:57:10 +0000 1 1 7 Build System, Metadata & Runtime OE-Core virtual machines 2.7 x86 Multiple RESOLVED WORKSFORME Medium+ minor 3.3 M3 1 jon.mason jon.mason randy.macleod richard.purdie ross.burton --- --- Don't know oldest_to_newest 83291 0 jon.mason 2019-03-18 19:48:55 +0000 There following kernel warning is printed during boot [ 18.370702] ------------[ cut here ]------------ [ 18.382099] WARNING: CPU: 0 PID: 446 at drivers/gpu/drm/ttm/ttm_bo_vm.c:303 ttm_bo_vm_open+0x3c/0x4c [ 18.383267] Modules linked in: [ 18.383789] CPU: 0 PID: 446 Comm: Xorg Not tainted 4.19.19-yocto-standard #1 [ 18.383964] Hardware name: Generic DT based system [ 18.384508] [<c021306c>] (unwind_backtrace) from [<c020d174>] (show_stack+0x20/0x24) [ 18.384719] [<c020d174>] (show_stack) from [<c09964a0>] (dump_stack+0x84/0xa4) [ 18.384904] [<c09964a0>] (dump_stack) from [<c0231dd0>] (__warn+0xe8/0x104) [ 18.385114] [<c0231dd0>] (__warn) from [<c0232180>] (warn_slowpath_null+0x4c/0x58) [ 18.385300] [<c0232180>] (warn_slowpath_null) from [<c072b408>] (ttm_bo_vm_open+0x3c/0x4c) [ 18.385499] [<c072b408>] (ttm_bo_vm_open) from [<c0230718>] (copy_process.part.3+0x13c4/0x17f0) [ 18.385703] [<c0230718>] (copy_process.part.3) from [<c0230ce8>] (_do_fork+0xc8/0x414) [ 18.385907] [<c0230ce8>] (_do_fork) from [<c0231154>] (sys_clone+0x30/0x38) [ 18.386108] [<c0231154>] (sys_clone) from [<c0201000>] (ret_fast_syscall+0x0/0x4c) [ 18.386308] Exception stack(0xde279fa8 to 0xde279ff0) [ 18.386477] 9fa0: b6ef7078 b6f03000 01200011 00000000 00000000 00000000 [ 18.386672] 9fc0: b6ef7078 b6f03000 b6ef74d0 00000078 00000000 b6ef7010 0051b03d be9bc9fc [ 18.386857] 9fe0: 00000078 be9ba8a8 b6ad564d b6a7ac46 [ 18.387096] ---[ end trace e8a5e15e3b7db8a9 ]--- This issue occurred after adding the Bochs VGA hardware (to enable graphics) in the qemuarm/qemuarm64 config files. It does not appear to affect the functionality of graphics. 88343 1 randy.macleod 2020-10-08 12:03:11 +0000 Jon since it's a M+ importance bug, it should have a specific milestone, feel free to move to something other than M1 if you think that makes sense. ../Randy 88946 2 jon.mason 2021-01-15 01:57:10 +0000 No longer seeing this issue in master. Closing.