[Bug 72255] New: [GM45/ILK/BYT/BDW]igt/gem_concurrent_blit/cpu-overwrite-source causes OOM killer

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=72255

          Priority: medium
            Bug ID: 72255
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [GM45/ILK/BYT/BDW]igt/gem_concurrent_blit/cpu-overwrit
                    e-source causes OOM killer
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: huax.lu at intel.com
          Hardware: All
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

System Environment:
--------------------------
Platform: GM45/ILK/BYT/BDW
kernel:   (drm-intel-nightly)2a9f2367690435ba1d3132c92a71300d2dbe90ba

Bug detailed description:
-------------------------
It causes OOM killer on GM45/ILK/BYT/BDW.
Many gem_concurrent_blit subcases have this issue.

output:
Killed

dmesg:
[   83.425615] Call Trace:
[   83.425654]  [<ffffffff81709bba>] ? dump_stack+0x41/0x51
[   83.425717]  [<ffffffff81705fe3>] ? dump_header.isra.8+0x69/0x194
[   83.425789]  [<ffffffff8106b059>] ? ktime_get_ts+0x49/0xab
[   83.425854]  [<ffffffff812cbcda>] ? ___ratelimit+0xae/0xc8
[   83.425919]  [<ffffffff810a30e9>] ? oom_kill_process+0x7c/0x311
[   83.425987]  [<ffffffff810a2eab>] ? oom_unkillable_task.isra.5+0x6d/0x7e
[   83.426063]  [<ffffffff810a3892>] ? out_of_memory+0x3b2/0x3e5
[   83.426130]  [<ffffffff810a6fdb>] ? __alloc_pages_nodemask+0x666/0x779
[   83.426206]  [<ffffffff810cffbc>] ? alloc_pages_current+0xc5/0xe2
[   83.426276]  [<ffffffff810a2779>] ? filemap_fault+0x25f/0x384
[   83.426343]  [<ffffffff810b7e9b>] ? __do_fault+0xac/0x3c3
[   83.426417]  [<ffffffff810bb538>] ? handle_mm_fault+0x1e7/0x7e4
[   83.426487]  [<ffffffff81711e9e>] ? __do_page_fault+0x422/0x46f
[   83.426557]  [<ffffffff810e94e6>] ? __pollwait+0xcb/0xcb
[   83.426618]  [<ffffffff810e94e6>] ? __pollwait+0xcb/0xcb
[   83.426680]  [<ffffffff8106b059>] ? ktime_get_ts+0x49/0xab
[   83.426744]  [<ffffffff810e96e9>] ? poll_select_set_timeout+0x4e/0x6f
[   83.426818]  [<ffffffff8170f432>] ? page_fault+0x22/0x30
[   83.426879] Mem-Info:
[   83.426908] Node 0 DMA per-cpu:
[   83.426950] CPU    0: hi:    0, btch:   1 usd:   0
[   83.427004] CPU    1: hi:    0, btch:   1 usd:   0
[   83.427059] CPU    2: hi:    0, btch:   1 usd:   0
[   83.427113] CPU    3: hi:    0, btch:   1 usd:   0
[   83.427167] Node 0 DMA32 per-cpu:
[   83.427211] CPU    0: hi:  186, btch:  31 usd:   0
[   83.427266] CPU    1: hi:  186, btch:  31 usd:   0
[   83.427320] CPU    2: hi:  186, btch:  31 usd:   0
[   83.427374] CPU    3: hi:  186, btch:  31 usd:   0
[   83.427440] active_anon:349508 inactive_anon:117402 isolated_anon:0

Reproduce steps:
----------------------------
1. ./gem_concurrent_blit --run-subtest cpu-overwrite-source

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