[Bug 107254] [BAT] igt at drv_selftest@mock_hugepages - dmesg-fail - Failed assertion: err == 0

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=107254

Chris Wilson <chris at chris-wilson.co.uk> changed:

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

--- Comment #1 from Chris Wilson <chris at chris-wilson.co.uk> ---
If my guess is correct that this is self-inflicted (as opposed to external
fragmentation), this should be prevented by:

commit d778847208c016f66a44d4c40baa74ca3bf724fd (HEAD -> drm-intel-next-queued,
drm-intel/for-linux-next, drm-intel/drm-intel-next-queued)
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Tue Jul 17 09:23:34 2018 +0100

    drm/i915/selftests: Free the backing store between iterations

    In the huge pages tests, we may have lots of objects being trapped on
    the freelist as we hold the struct_mutex allowing the free worker no
    opportunity to recover the backing store. We also have stricter
    requirements and the desire for large contiguous pages, further
    increasing the allocation pressure. To reduce the chance of running out
    of memory, we could either drop the mutex and flush the free worker, or
    we could release the backing store directly. We do the latter in this
    patch for simplicity.

    References: https://bugs.freedesktop.org/show_bug.cgi?id=107254
    Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
    Cc: Matthew Auld <matthew.william.auld at gmail.com>
    Reviewed-by: Matthew Auld <matthew.william.auld at gmail.com>
    Link:
https://patchwork.freedesktop.org/patch/msgid/20180717082334.18774-1-chris@chris-wilson.co.uk

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