[Bug 91577] [HD Graphics 4000] Segfault accessing rq->bo->handle

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91577

--- Comment #33 from Chris Wilson <chris at chris-wilson.co.uk> ---
I think this should reduce the stress:

commit 07bcd3f0c715a37ac24a630173e0e28056567421
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Fri Aug 7 15:26:30 2015 +0100

    sna: Use direct uploads into a Damage tracked for v.small operations

    If the batch is being frequently flushed due to Damage+Composite
    tracking, we cannot amalgamate the small copies into the destination and
    so end up sending thousands and thousands of tiny batches with tiny
    render copies hogging the GPU.

    References: https://bugs.freedesktop.org/show_bug.cgi?id=91577
    Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

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