Bug 111157

Summary: [CI][DRMTIP] igt@gem_create@create-clear - dmesg-fail - Failed assertion: __gem_read(fd, handle, offset, buf, length) == 0
Product: DRI Reporter: Lakshmi <lakshminarayana.vudum>
Component: DRM/IntelAssignee: Intel GFX Bugs mailing list <intel-gfx-bugs>
Status: CLOSED WORKSFORME QA Contact: Intel GFX Bugs mailing list <intel-gfx-bugs>
Severity: normal    
Priority: medium CC: intel-gfx-bugs
Version: DRI git   
Hardware: Other   
OS: All   
Whiteboard: ReadyForDev
i915 platform: CFL i915 features: GEM/Other

Description Lakshmi 2019-07-17 10:23:54 UTC 
https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_323/fi-cfl-8700k/igt@gem_create@create-clear.html

Starting subtest: create-clear
(gem_create:1338) ioctl_wrappers-CRITICAL: Test assertion failure function gem_read, file ../lib/ioctl_wrappers.c:388:
(gem_create:1338) ioctl_wrappers-CRITICAL: Failed assertion: __gem_read(fd, handle, offset, buf, length) == 0
(gem_create:1338) ioctl_wrappers-CRITICAL: Last errno: 12, Cannot allocate memory
(gem_create:1338) ioctl_wrappers-CRITICAL: error: -12 != 0
Subtest create-clear failed.
**** DEBUG ****
(gem_create:1338) drmtest-DEBUG: Test requirement passed: !(fd<0)
(gem_create:1338) igt_debugfs-DEBUG: Opening debugfs directory '/sys/kernel/debug/dri/0'
(gem_create:1338) igt_debugfs-DEBUG: Opening debugfs directory '/sys/kernel/debug/dri/0'
(gem_create:1338) ioctl_wrappers-CRITICAL: Test assertion failure function gem_read, file ../lib/ioctl_wrappers.c:388:
(gem_create:1338) ioctl_wrappers-CRITICAL: Failed assertion: __gem_read(fd, handle, offset, buf, length) == 0
(gem_create:1338) ioctl_wrappers-CRITICAL: Last errno: 12, Cannot allocate memory
(gem_create:1338) ioctl_wrappers-CRITICAL: error: -12 != 0
(gem_create:1338) igt_core-INFO: Stack trace:
(gem_create:1338) igt_core-INFO:   #0 ../lib/igt_core.c:1674 __igt_fail_assert()
(gem_create:1338) igt_core-INFO:   #1 ../lib/ioctl_wrappers.c:389 gem_read()
(gem_create:1338) igt_core-INFO:   #2 [<unknown>+0xdfbb1400]
****  END  ****
Subtest create-clear: FAIL (6.484s)
(gem_create:1338) ioctl_wrappers-CRITICAL: Test assertion failure function gem_read, file ../lib/ioctl_wrappers.c:388:
(gem_create:1338) ioctl_wrappers-CRITICAL: Failed assertion: __gem_read(fd, handle, offset, buf, length) == 0
(gem_create:1338) ioctl_wrappers-CRITICAL: Last errno: 12, Cannot allocate memory
(gem_create:1338) ioctl_wrappers-CRITICAL: error: -12 != 0
Comment 1 CI Bug Log 2019-07-17 10:24:31 UTC 
The CI Bug Log issue associated to this bug has been updated.

### New filters associated

* CFL: igt@gem_create@create-clear - dmesg-fail - Failed assertion: __gem_read(fd, handle, offset, buf, length) == 0
  - https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_323/fi-cfl-8700k/igt@gem_create@create-clear.html
Comment 2 Chris Wilson 2019-07-23 11:40:07 UTC 
A nuisance, but we will hopefully see some improvement with more struct_mutex removal. This should be a temporary setback from not flushing as hard; although steps like https://patchwork.freedesktop.org/series/63943/ will help in correcting the shrink counters.
Comment 3 Andi 2019-07-27 11:26:00 UTC 
This is another issue which is hard to reproduce.
I tried to reproduce it for one entire night, but couldn't manage to get the failure.

I would wait that Chris patch goes in and mark it as fixed.
Comment 4 Chris Wilson 2019-08-03 11:25:37 UTC 
commit 1aff1903d0ff53f055088a77948ac8d8224d42db
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Fri Aug 2 22:21:36 2019 +0100

    drm/i915: Hide unshrinkable context objects from the shrinker

Perhaps good enough for now. More to come later.
Comment 5 Lakshmi 2019-09-10 06:42:09 UTC 
(In reply to Chris Wilson from comment #4)
> commit 1aff1903d0ff53f055088a77948ac8d8224d42db
> Author: Chris Wilson <chris@chris-wilson.co.uk>
> Date:   Fri Aug 2 22:21:36 2019 +0100
> 
>     drm/i915: Hide unshrinkable context objects from the shrinker
> 
> Perhaps good enough for now. More to come later.

Separate bug 111625 created for failure on SNB.

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