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Date:   Mon, 03 Jun 2019 00:31:33 +0300
From:   Serge Belyshev <>
To:     Chris Wilson <>
Subject: Re: [PATCH 2/2] drm/i915: Skip object locking around a no-op set-domain ioctl


> This patch causes lockups in firefox. They appear like non-fatal hangs
> of the webpage contents, "fixable" with alt-tab or a background system
> load.  I have verified that reverting the commit 754a254427 on top of
> current Linus tree fixes the problem.

This is still broken in v5.2-rc3.

I have also verified that the particular commit, if backported to v5.1
release, breaks firefox there too in the same way.

(for reference:)

commit 754a25442705c4f90e0d05f1a7bd303ffe700ca9
Author: Chris Wilson <>
Date:   Thu Mar 21 16:19:08 2019 +0000

    drm/i915: Skip object locking around a no-op set-domain ioctl

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