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            <b><a class="bz_bug_link 
          bz_status_ASSIGNED "
   title="ASSIGNED - [KBL BXT HSW BSW SKL IVB SNB]igt/gem_mmap_gtt/big-copy fails"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=90412#c26">Comment # 26</a>
              on <a class="bz_bug_link 
          bz_status_ASSIGNED "
   title="ASSIGNED - [KBL BXT HSW BSW SKL IVB SNB]igt/gem_mmap_gtt/big-copy fails"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=90412">bug 90412</a>
              from <span class="vcard"><a class="email" href="mailto:christophe.prigent@intel.com" title="cprigent <christophe.prigent@intel.com>"> <span class="fn">cprigent</span></a>
</span></b>
        <pre>Created <span class=""><a href="attachment.cgi?id=123694" name="attach_123694" title="kbl-dmesg-big-copy">attachment 123694</a> <a href="attachment.cgi?id=123694&action=edit" title="kbl-dmesg-big-copy">[details]</a></span>
kbl-dmesg-big-copy

Fail on KBL-U with last setup:

# ./gem_mmap_gtt --run-subtest big-copy
IGT-Version: 1.14-NOT-GIT (x86_64) (Linux: 4.6.0-rc7-nightly+ x86_64)
Writing a 100%
Writing b 100%
Copying a<->b 100%
(gem_mmap_gtt:2176) CRITICAL: Test assertion failure function test_huge_copy,
file gem_mmap_gtt.c:447:
(gem_mmap_gtt:2176) CRITICAL: Failed assertion: memcmp(pattern_a, a +
PAGE_SIZE*i, PAGE_SIZE) == 0
Stack trace:
  #0 [__igt_fail_assert+0xf1]
  #1 [test_huge_copy+0x55b]
  #2 [__real_main563+0xbd4]
  #3 [main+0x29]
  #4 [__libc_start_main+0xf0]
  #5 [_start+0x29]
  #6 [<unknown>+0x29]
Subtest big-copy failed.
**** DEBUG ****
(gem_mmap_gtt:2176) intel-os-DEBUG: Checking 2 surfaces of size 268 439 552
bytes (total 536 883 200) against RAM
(gem_mmap_gtt:2176) intel-os-DEBUG: Test requirement passed:
__intel_check_memory(count, size, mode, &required, &total)
(gem_mmap_gtt:2176) igt-core-DEBUG: Test requirement passed:
!igt_run_in_simulation()
(gem_mmap_gtt:2176) DEBUG: Test requirement passed: a
(gem_mmap_gtt:2176) DEBUG: Test requirement passed: b
(gem_mmap_gtt:2176) CRITICAL: Test assertion failure function test_huge_copy,
file gem_mmap_gtt.c:447:
(gem_mmap_gtt:2176) CRITICAL: Failed assertion: memcmp(pattern_a, a +
PAGE_SIZE*i, PAGE_SIZE) == 0
****  END  ****
Subtest big-copy: FAIL (2,880s)


Hardware
Platform: KABY LAKE-U
CPU : Intel(R) Core(TM) @ 2.60GHz
MCP : KBL-U G0 2+2 (ou ULT-G0)
QDF : QYQ8
Chipset PCH: SPT-LP C1
CRB : KABY LAKE U DDR3L RVP7 CRB FAB1

Software
BIOS : KBLSE2R1.R00.X015.B01.1511271314
ME FW : 11.5.0.1008
Ksc (EC FW): 1.20
Linux distribution: Ubuntu 15.10 64 bits
kernel drm-intel-nightly 4.6.0-rc7 61f856f from
<a href="http://cgit.freedesktop.org/drm-intel/">http://cgit.freedesktop.org/drm-intel/</a>
  commit 61f856faa1e6ff9dddad214be1e372e8aacfc0f4
  Author: Ville Syrjälä <<a href="mailto:ville.syrjala@linux.intel.com">ville.syrjala@linux.intel.com</a>>
  Date:   Mon May 9 19:24:21 2016 +0300
  drm-intel-nightly: 2016y-05m-09d-16h-24m-01s UTC integration manifest
libdrm-2.4.68 fc09c5a from git://anongit.freedesktop.org/mesa/drm
cairo: 1.15.2 db8a7f1 from git://anongit.freedesktop.org/cairo
IGT 1.14 cc24755 from
<a href="http://anongit.freedesktop.org/git/xorg/app/intel-gpu-tools.git">http://anongit.freedesktop.org/git/xorg/app/intel-gpu-tools.git</a></pre>
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