[Bug 106744] [CI] igt at gem_* - fail - Failed assertion: __gem_execbuf(fd, execbuf) == 0

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=106744

--- Comment #3 from Chris Wilson <chris at chris-wilson.co.uk> ---
(In reply to Chris Wilson from comment #2)
> (In reply to Martin Peres from comment #1)
> > https://intel-gfx-ci.01.org/tree/drm-tip/IGT_4515/fi-byt-n2820/
> > igt at gem_exec_gttfill@basic.html
> > 
> > (gem_exec_gttfill:1501) ioctl_wrappers-CRITICAL: Test assertion failure
> > function gem_execbuf, file ../lib/ioctl_wrappers.c:605:
> > (gem_exec_gttfill:1501) ioctl_wrappers-CRITICAL: Failed assertion:
> > __gem_execbuf(fd, execbuf) == 0
> > (gem_exec_gttfill:1501) ioctl_wrappers-CRITICAL: error: -16 != 0
> > Subtest basic failed.
> 
> That is a very different error. EINVAL (original bug) is an igt bug, EBUSY
> here is a kernel bug.

Gone.

commit 827db9d8bb4a01314f214065e3f18c8345c5fc9f
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Thu Jun 21 08:32:05 2018 +0100

    drm/i915: Ignore applying the self-relocation BIAS if no relocations

    We only need to apply the BIAS for self-relocations into the batchbuffer
    iff the execobject has any relocations.

    This suppresses some warnings we may get with a full gtt (so the batch
    object has wound up at 0 from a previous invocation), but doesn't fix
    the underlying problem of how we tried to move a pinned batch vma (how
    we have a pinned user vma outside of execbuf, I do not know, though this
    being on an aliasing ppgtt means it could be a spurious pinning via the
    global gtt). One step at a time...

    References: https://bugs.freedesktop.org/show_bug.cgi?id=106744#c1
    Testcase: igt/gem_exec_gttfill # byt (sporadic)
    Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
    Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
    Reviewed-by: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
    Link:
https://patchwork.freedesktop.org/patch/msgid/20180621073205.26701-1-chris@chris-wilson.co.uk

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