diff options
| author | Chris Wilson <[email protected]> | 2020-10-27 18:47:59 +0000 |
|---|---|---|
| committer | Chris Wilson <[email protected]> | 2020-10-28 08:52:41 +0000 |
| commit | c071ab8c20748873183d5f210aa105d6a3e2d56a (patch) | |
| tree | 32641294d7e879995d405db6edc2107fa92aef48 /lib/test_fortify/write_overflow-strcpy.c | |
| parent | 6e7a21e7ab27dd5e42e212155200c1c84bbadbc7 (diff) | |
drm/i915/gem: Avoid synchronous binds deep within locks
On bxt, we require a VT'd w/a to serialise all GGTT updates with memory
transfers, and use stop_machine() for this purpose. stop_machine() is a
global serialisation barrier and so dangerous to use from within
critical sections, as the stop_machine() will wait for all cpus to enter
the stop_machine callback, and those cpus may be waiting for the
critical section already held.
Fixes: d7085b0faac8 ("drm/i915/gem: Poison stolen pages before use")
Signed-off-by: Chris Wilson <[email protected]>
Cc: Mika Kuoppala <[email protected]>
Reviewed-by: Mika Kuoppala <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
Diffstat (limited to 'lib/test_fortify/write_overflow-strcpy.c')
0 files changed, 0 insertions, 0 deletions