[Bug 76614] New: [Bisected]igt/gem_cs_prefetch fails with OOM killer on debug kernel

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=76614

          Priority: high
            Bug ID: 76614
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [Bisected]igt/gem_cs_prefetch fails with OOM killer on
                    debug kernel
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: major
    Classification: Unclassified
                OS: Linux (All)
          Reporter: huax.lu at intel.com
          Hardware: All
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 96395
  --> https://bugs.freedesktop.org/attachment.cgi?id=96395&action=edit
dmesg

System Environment:
--------------------------
Platform: Ivybridge
Kernel: drm-intel-nightly/84295583b8322f96a187c4fc5cca5dd7d511f57e/debug

Bug detailed description:
-----------------------------
It fails on all platforms with -nightly and -queued branch.It doesn't happen on
-fixes branch.

Bisect shows: c4e1acbb35e4a3838cdfc0e7f8237e844aff00b6 is the first bad commit.
commit c4e1acbb35e4a3838cdfc0e7f8237e844aff00b6
Author: Rafael J. Wysocki 
Date: Thu Mar 13 00:22:58 2014 +0100

ACPI / init: Invoke early ACPI initialization later

Commit 73f7d1ca3263 (ACPI / init: Run acpi_early_init() before
timekeeping_init()) optimistically moved the early ACPI initialization
before timekeeping_init(), but that didn't work, because it broke fast
TSC calibration for Julian Wollrath on Thinkpad x121e (and most likely
for others too). The reason is that acpi_early_init() enables the SCI
and that interferes with the fast TSC calibration mechanism.

Thus follow the original idea to execute acpi_early_init() before
efi_enter_virtual_mode() to help the EFI people for now and we can

output:
IGT-Version: 1.6-g7a81094 (x86_64) (Linux:
3.14.0-rc7_drm-intel-nightly_842955_20140325_debug+ x86_64)
gem_cs_prefetch:  73%Killed

Reproduce steps:
---------------------------- 
1. ./gem_cs_prefetch

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