Debian 9 (stretch)/Ubuntu 17.04 (zesty) have beignet 1.3.0, libdrm
2.4.74/2.4.76 and Linux 4.9/4.10.
On some hardware (possibly all of Ivy Bridge and Haswell??), this does
not work at all: attempting to run anything fails with
drm_intel_gem_bo_context_exec() failed: Device or resource busy
Beignet: "Exec event 0xnnnn error, type is 4592, error staus is -5"
https://bugs.freedesktop.org/show_bug.cgi?id=98647
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=860805
As the package maintainer, I'd like to fix this. I am aware of two
fixes, either of which works for me, but
https://bugs.freedesktop.org/show_bug.cgi?id=100639 reports that neither
of them is perfect:
- The fix used in 1.4:
https://cgit.freedesktop.org/beignet/commit/?id=8b04f0be372da8eabdc93d6ae1b81a3c83cba284
- Disable HAS_BO_SET_SOFTPIN: fixes more (but still not everything), but
also disables some functionality (OpenCL 2.0). This is probably why the
bug only appears in recent Linux versions, and hence was missed when I
tested the packages in a chroot on Linux 3.16: softpin was only
introduced in Linux 4.5.
Has anyone other than its reporter seen #100639 (i.e. this error
persisting after applying the 1.4 fix, particularly when using multiple
OpenCL kernels such as in clFFT)?
Any other suggestions?
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