64 DRM device nodes is not enough for everyone. Upgrade it to ~512K (which definitely is more than enough).
To allow testing userspace support for >64 devices, add additional DRM modparam (skip_legacy_minors) which causes DRM to skip allocating minors in 0-192 range. Additionally - convert minors to use XArray instead of IDR to simplify the locking. v1 -> v2: Don't touch DRM_MINOR_CONTROL and its range (Simon Ser) v2 -> v3: Don't use legacy scheme for >=192 minor range (Dave Airlie) Add modparam for testing (Dave Airlie) Add lockdep annotation for IDR (Daniel Vetter) v3 -> v4: Convert from IDR to XArray (Matthew Wilcox) Michał Winiarski (3): drm: Use XArray instead of IDR for minors drm: Expand max DRM device number to full MINORBITS drm: Introduce skip_legacy_minors modparam drivers/gpu/drm/drm_drv.c | 66 +++++++++++++++++++-------------------- 1 file changed, 33 insertions(+), 33 deletions(-) -- 2.37.3
