[Bug 105190] gem_quiescent_gpu assertion fails on distribution kernels

[Bug 105190] gem_quiescent_gpu assertion fails on distribution kernels

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=105190

            Bug ID: 105190
           Summary: gem_quiescent_gpu assertion fails on distribution
                    kernels
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: IGT
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: arkadiusz.hiler@intel.com

Running any test on Fedora causes a failed assertion during gem_quiescent_gpu()
which is used in drm_open_driver* family of functions.

IGT-Version: 1.21-g94bd67c5 (x86_64) (Linux: 4.15.3-300.fc27.x86_64 x86_64)
(kms_pipe_crc_basic:4042) igt_debugfs-CRITICAL: Test assertion failure function
igt_drop_caches_set, file ../lib/igt_debugfs.c:970:
(kms_pipe_crc_basic:4042) igt_debugfs-CRITICAL: Failed assertion:
igt_sysfs_printf(dir, "i915_gem_drop_caches", "0x%" PRIx64, val) > 0
(kms_pipe_crc_basic:4042) igt_debugfs-CRITICAL: Last errno: 1, Operation not
permitted
Stack trace:
  #0 [__igt_fail_assert+0x16e]
  #1 [igt_drop_caches_set+0x75]
  #2 [gem_quiescent_gpu+0x1f]
  #3 [drm_open_driver+0xae]
  #4 [drm_open_driver_master+0x15]
  #5 [__real_main181+0x1e]
  #6 [main+0x44]
  #7 [__libc_start_main+0xea]
  #8 [_start+0x2a]
Test kms_pipe_crc_basic failed.
**** DEBUG ****
(kms_pipe_crc_basic:4042) igt_core-INFO: IGT-Version: 1.21-g94bd67c5 (x86_64)
(Linux: 4.15.3-300.fc27.x86_64 x86_64)
(kms_pipe_crc_basic:4042) drmtest-DEBUG: Test requirement passed: !(fd<0)
(kms_pipe_crc_basic:4042) igt_debugfs-DEBUG: Opening debugfs directory
'/sys/kernel/debug/dri/0'
(kms_pipe_crc_basic:4042) igt_debugfs-CRITICAL: Test assertion failure function
igt_drop_caches_set, file ../lib/igt_debugfs.c:970:
(kms_pipe_crc_basic:4042) igt_debugfs-CRITICAL: Failed assertion:
igt_sysfs_printf(dir, "i915_gem_drop_caches", "0x%" PRIx64, val) > 0
(kms_pipe_crc_basic:4042) igt_debugfs-CRITICAL: Last errno: 1, Operation not
permitted
(kms_pipe_crc_basic:4042) igt_core-INFO: Stack trace:
(kms_pipe_crc_basic:4042) igt_core-INFO:   #0 [__igt_fail_assert+0x16e]
(kms_pipe_crc_basic:4042) igt_core-INFO:   #1 [igt_drop_caches_set+0x75]
(kms_pipe_crc_basic:4042) igt_core-INFO:   #2 [gem_quiescent_gpu+0x1f]
(kms_pipe_crc_basic:4042) igt_core-INFO:   #3 [drm_open_driver+0xae]
(kms_pipe_crc_basic:4042) igt_core-INFO:   #4 [drm_open_driver_master+0x15]
(kms_pipe_crc_basic:4042) igt_core-INFO:   #5 [__real_main181+0x1e]
(kms_pipe_crc_basic:4042) igt_core-INFO:   #6 [main+0x44]
(kms_pipe_crc_basic:4042) igt_core-INFO:   #7 [__libc_start_main+0xea]
(kms_pipe_crc_basic:4042) igt_core-INFO:   #8 [_start+0x2a]
****  END  ****
Subtest bad-pipe: FAIL
Subtest bad-source: FAIL
Subtest bad-nb-words-1: FAIL
Subtest bad-nb-words-3: FAIL
Subtest read-crc-pipe-A: FAIL
Subtest read-crc-pipe-A-frame-sequence: FAIL
Subtest nonblocking-crc-pipe-A: FAIL
Subtest nonblocking-crc-pipe-A-frame-sequence: FAIL
Subtest suspend-read-crc-pipe-A: FAIL
Subtest hang-read-crc-pipe-A: FAIL
Subtest read-crc-pipe-B: FAIL
Subtest read-crc-pipe-B-frame-sequence: FAIL
Subtest nonblocking-crc-pipe-B: FAIL
Subtest nonblocking-crc-pipe-B-frame-sequence: FAIL
Subtest suspend-read-crc-pipe-B: FAIL
Subtest hang-read-crc-pipe-B: FAIL
Subtest read-crc-pipe-C: FAIL
Subtest read-crc-pipe-C-frame-sequence: FAIL
Subtest nonblocking-crc-pipe-C: FAIL
Subtest nonblocking-crc-pipe-C-frame-sequence: FAIL
Subtest suspend-read-crc-pipe-C: FAIL
Subtest hang-read-crc-pipe-C: FAIL

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[Bug 105190] gem_quiescent_gpu assertion fails on distribution kernels

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https://bugs.freedesktop.org/show_bug.cgi?id=105190

--- Comment #1 from Chris Wilson <chris@chris-wilson.co.uk> ---
EPERM is not from us.

strace just to check where that is being raised?

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[Bug 105190] gem_quiescent_gpu assertion fails on distribution kernels

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https://bugs.freedesktop.org/show_bug.cgi?id=105190

--- Comment #2 from arkadiusz.hiler@intel.com <arkadiusz.hiler@intel.com> ---
# getenforce
Permissive
# strace ./kms_pipe_crc_basic 2>&1 | grep EPERM
openat(4, "i915_gem_drop_caches", O_WRONLY) = -1 EPERM (Operation not
permitted)

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[Bug 105190] gem_quiescent_gpu assertion fails on distribution kernels

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https://bugs.freedesktop.org/show_bug.cgi?id=105190

--- Comment #3 from Chris Wilson <chris@chris-wilson.co.uk> ---
ls -l /sys/kernel/debug/dri/0/i915_gem_drop_caches ?

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[Bug 105190] gem_quiescent_gpu assertion fails on distribution kernels

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https://bugs.freedesktop.org/show_bug.cgi?id=105190

--- Comment #4 from arkadiusz.hiler@intel.com <arkadiusz.hiler@intel.com> ---
# ls -l /sys/kernel/debug/dri/0/i915_gem_drop_caches
-rw-r--r--. 1 root root 0 Feb 21 14:05
/sys/kernel/debug/dri/0/i915_gem_drop_caches

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[Bug 105190] gem_quiescent_gpu assertion fails on distribution kernels

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https://bugs.freedesktop.org/show_bug.cgi?id=105190

--- Comment #5 from Chris Wilson <chris@chris-wilson.co.uk> ---
And whoami? You are running as root, right?

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[Bug 105190] gem_quiescent_gpu assertion fails on distribution kernels

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=105190

--- Comment #6 from arkadiusz.hiler@intel.com <arkadiusz.hiler@intel.com> ---
obviously

# whoami
root

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[Bug 105190] gem_quiescent_gpu assertion fails on distribution kernels

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=105190

--- Comment #7 from Chris Wilson <chris@chris-wilson.co.uk> ---
Then I have no idea what your distro has done :)

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[Bug 105190] gem_quiescent_gpu assertion fails on distribution kernels

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=105190

arkadiusz.hiler@intel.com <arkadiusz.hiler@intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |NOTABUG
             Status|NEW                         |RESOLVED

--- Comment #8 from arkadiusz.hiler@intel.com <arkadiusz.hiler@intel.com> ---
Looks like it's caused by Fedora's customization. They picked up kernel
lockdown series https://lwn.net/Articles/723653/

If the system is booted using secure boot it puts the kernel in lockdown mode,
which includes disabling all the DebugFSes.

To enable it you have to lift the lockdown:

# sysctl kernel.sysrq=1
<Alt-PrtSc-x> on a physical keyboard; writing to /proc/sysrq-trigger does not
work
[  137.276888] sysrq: SysRq : Disabling Secure Boot restrictions
[  137.276963] Lifting lockdown

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[Bug 105190] gem_quiescent_gpu assertion fails on distribution kernels

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https://bugs.freedesktop.org/show_bug.cgi?id=105190

Lakshmi <lakshminarayana.vudum@intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |CLOSED

--- Comment #9 from Lakshmi <lakshminarayana.vudum@intel.com> ---
Closed as NOTABUG.

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[Bug 105190] gem_quiescent_gpu assertion fails on distribution kernels

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https://bugs.freedesktop.org/show_bug.cgi?id=105190

--- Comment #10 from emersion <contact@emersion.fr> ---
Alternatively, it's possible to use a vanilla kernel:
https://fedoraproject.org/wiki/Kernel_Vanilla_Repositories

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