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Subject: Re: Linux 5.11-rc5
From:   Chris Wilson <chris@chris-wilson.co.uk>
To:     Linus Torvalds <torvalds@linux-foundation.org>,
        Mike Rapoport <rppt@linux.ibm.com>
Cc:     Andrew Morton <akpm@linux-foundation.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Date:   Mon, 25 Jan 2021 20:34:34 +0000
Message-ID: <161160687463.28991.354987542182281928@build.alporthouse.com>
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Quoting Linus Torvalds (2021-01-25 01:06:40)
> Mike Rapoport (3):
...
>       mm: fix initialization of struct page for holes in memory layout

We have half a dozen or so different machines in CI that are silently
failing to boot, that we believe is bisected to this patch.

17:56              tsa : ickle: dolphin: I hit the following patch in my bisection, and the hang is also dependent on kconfig
17:56              tsa : first bad commit: [d3921cb8be29ce5668c64e23ffdaeec5f8c69399] mm: fix initialization of struct page for holes in
                         memory layout
17:57              tsa : couldn't reproduce on older CI kconfig, current one does it
                         https://gitlab.freedesktop.org/gfx-ci/i915-infra/-/blob/master/kconfig/debug

Here's a boot dmesg from some affected machines from just before the merge
with rc5:
https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_9676/shard-skl1/boot18.txt
https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_9676/fi-skl-6600u/boot.html
https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_9676/fi-bsw-cyan/boot.html
https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_9676/fi-bdw-samus/boot.html
-Chris