Chris Wilson
2214ddc2fd
drm/mm: Allow drm_mm_initialized() to be used outside of the locks
Mark up the potential racy read in drm_mm_initialized(), as we want a
cheap and cheerful check:
[ 121.098731] BUG: KCSAN: data-race in _i915_gem_object_create_stolen [i915] / rm_hole
[ 121.098766]
[ 121.098789] write (marked) to 0xffff8881f01ed330 of 8 bytes by task 3568 on cpu 3:
[ 121.098831] rm_hole+0x64/0x140
[ 121.098860] drm_mm_insert_node_in_range+0x3d3/0x6c0
[ 121.099254] i915_gem_stolen_insert_node_in_range+0x91/0xe0 [i915]
[ 121.099646] _i915_gem_object_create_stolen+0x9d/0x100 [i915]
[ 121.100047] i915_gem_object_create_region+0x7a/0xa0 [i915]
[ 121.100451] i915_gem_object_create_stolen+0x33/0x50 [i915]
[ 121.100849] intel_engine_create_ring+0x1af/0x280 [i915]
[ 121.101242] __execlists_context_alloc+0xce/0x3d0 [i915]
[ 121.101635] execlists_context_alloc+0x25/0x40 [i915]
[ 121.102030] intel_context_alloc_state+0xb6/0xf0 [i915]
[ 121.102420] __intel_context_do_pin+0x1ff/0x220 [i915]
[ 121.102815] i915_gem_do_execbuffer+0x46b4/0x4c20 [i915]
[ 121.103211] i915_gem_execbuffer2_ioctl+0x2c3/0x580 [i915]
[ 121.103244] drm_ioctl_kernel+0xe4/0x120
[ 121.103269] drm_ioctl+0x297/0x4c7
[ 121.103296] ksys_ioctl+0x89/0xb0
[ 121.103321] __x64_sys_ioctl+0x42/0x60
[ 121.103349] do_syscall_64+0x6e/0x2c0
[ 121.103377] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 121.103403]
[ 121.103426] read to 0xffff8881f01ed330 of 8 bytes by task 3109 on cpu 1:
[ 121.103819] _i915_gem_object_create_stolen+0x30/0x100 [i915]
[ 121.104228] i915_gem_object_create_region+0x7a/0xa0 [i915]
[ 121.104631] i915_gem_object_create_stolen+0x33/0x50 [i915]
[ 121.105025] intel_engine_create_ring+0x1af/0x280 [i915]
[ 121.105420] __execlists_context_alloc+0xce/0x3d0 [i915]
[ 121.105818] execlists_context_alloc+0x25/0x40 [i915]
[ 121.106202] intel_context_alloc_state+0xb6/0xf0 [i915]
[ 121.106595] __intel_context_do_pin+0x1ff/0x220 [i915]
[ 121.106985] i915_gem_do_execbuffer+0x46b4/0x4c20 [i915]
[ 121.107375] i915_gem_execbuffer2_ioctl+0x2c3/0x580 [i915]
[ 121.107409] drm_ioctl_kernel+0xe4/0x120
[ 121.107437] drm_ioctl+0x297/0x4c7
[ 121.107464] ksys_ioctl+0x89/0xb0
[ 121.107489] __x64_sys_ioctl+0x42/0x60
[ 121.107511] do_syscall_64+0x6e/0x2c0
[ 121.107535] entry_SYSCALL_64_after_hwframe+0x44/0xa9
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20200309121529.16497-1-chris@chris-wilson.co.uk
2020-03-16 10:31:21 +00:00
..
2020-03-10 10:51:24 +01:00
2020-02-12 13:03:27 +01:00
2020-01-31 16:39:53 +01:00
2020-01-31 16:00:21 +01:00
2020-02-18 16:50:45 +01:00
2020-02-26 13:31:41 +02:00
2020-02-26 13:31:23 +02:00
2020-02-11 15:03:08 +01:00
2020-03-11 13:13:00 -07:00
2020-02-13 13:08:13 +01:00
2020-01-24 17:41:34 +00:00
2020-02-17 10:34:34 +01:00
2020-03-13 14:52:35 -04:00
2020-02-13 13:10:10 +01:00
2020-03-11 13:12:38 -07:00
2020-02-26 13:31:20 +02:00
2020-03-06 14:19:58 +01:00
2020-01-24 17:41:34 +00:00
2020-02-06 10:32:54 +01:00
2020-03-04 06:35:07 +05:30
2020-02-04 23:57:26 +00:00
2020-01-19 18:07:08 +01:00
2020-03-16 10:31:21 +00:00
2020-02-15 21:15:46 +01:00
2020-02-15 21:15:17 +01:00
2020-01-12 21:16:30 +01:00
2020-03-06 16:08:24 +01:00
2020-02-15 14:39:35 +01:00
2020-03-02 09:22:35 +01:00
2020-02-13 13:10:10 +01:00
2020-01-27 16:46:44 -05:00