[Bug 92845] [BSW clflush] igt/gem_partial_pwrite_pread subtests fail

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=92845

--- Comment #11 from Chris Wilson <chris at chris-wilson.co.uk> ---
fwiw, I have written a test that seems to disprove the clflush theory.

(gem_concurrent_blit:714) CRITICAL: Test assertion failure function prw_cmp_bo,
file gem_concurrent_all.c:112:
(gem_concurrent_blit:714) CRITICAL: Failed assertion: vaddr[i] == val
(gem_concurrent_blit:714) CRITICAL: error: 0xdeadbeef != 0xdeadbeec
Stack trace:
  #0 [__igt_fail_assert+0xf1]
  #1 [prw_cmp_bo+0x8b]
  #2 [<unknown>+0x8b]
child 1 failed with exit status 99
Subtest 16MiB-tiny-prw-render-write-read-bcs-forked failed.
**** DEBUG ****
(gem_concurrent_blit:610) ioctl-wrappers-DEBUG: Test requirement passed:
__gem_set_caching(fd, handle, caching) == 0
****  END  ****
Subtest 16MiB-tiny-prw-render-write-read-bcs-forked: FAIL (0.873s)

et al.

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