[3.18+] Can't boot with commit bd809af1 ("x86: Enable PAT to use cache mode translation tables")

[허종만]

Hi,

My Linux virtual machine on (Windows) VMWare workstation 10 can't boot with following commit.

commit bd809af16e3ab1f8d55b3e2928c47c67e2a865d2
Author: Juergen Gross 
Date:   Mon Nov 3 14:02:03 2014 +0100

    x86: Enable PAT to use cache mode translation tables

Unfortunately I can't see any console log.
Reverting the commit fixes my boot issue. git bisect log follows,

$ git bisect log
git bisect start
# bad: [92a578b064d0227a3a7fbbdb9e29dbab7f8d400e] Merge tag 'pm+acpi-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
git bisect bad 92a578b064d0227a3a7fbbdb9e29dbab7f8d400e
# good: [b2776bf7149bddd1f4161f14f79520f17fc1d71d] Linux 3.18
git bisect good b2776bf7149bddd1f4161f14f79520f17fc1d71d
# good: [6da314122ddc11936c6f054753bbb956a499d020] Merge tag 'dt-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
git bisect good 6da314122ddc11936c6f054753bbb956a499d020
# good: [482a3767e5087f6e6ad2486a6655aaa5f3d59301] exit: reparent: call forget_original_parent() under tasklist_lock
git bisect good 482a3767e5087f6e6ad2486a6655aaa5f3d59301
# bad: [cbfe0de303a55ed96d8831c2d5f56f8131cd6612] Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
git bisect bad cbfe0de303a55ed96d8831c2d5f56f8131cd6612
# bad: [a6b849578ef3e0b131b1ea4063473a4f935a65e9] Merge branch 'for-linus' of git://git.samba.org/sfrench/cifs-2.6
git bisect bad a6b849578ef3e0b131b1ea4063473a4f935a65e9
# bad: [c9f861c77269bc9950c16c6404a9476062241671] Merge branch 'x86-ras-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect bad c9f861c77269bc9950c16c6404a9476062241671
# good: [773fed910d41e443e495a6bfa9ab1c2b7b13e012] Merge branches 'x86-platform-for-linus' and 'x86-uv-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect good 773fed910d41e443e495a6bfa9ab1c2b7b13e012
# good: [773fed910d41e443e495a6bfa9ab1c2b7b13e012] Merge branches 'x86-platform-for-linus' and 'x86-uv-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect good 773fed910d41e443e495a6bfa9ab1c2b7b13e012
# good: [f439c429c320981943f8b64b2a4049d946cb492b] x86: Support PAT bit in pagetable dump for lower levels
git bisect good f439c429c320981943f8b64b2a4049d946cb492b
# good: [e3480271f59253cb60d030aa5e615bf00b731fea] x86, mce, severity: Extend the the mce_severity mechanism to handle UCNA/DEFERRED error
git bisect good e3480271f59253cb60d030aa5e615bf00b731fea
# bad: [0dbcae884779fdf7e2239a97ac7488877f0693d9] x86: mm: Move PAT only functions to mm/pat.c
git bisect bad 0dbcae884779fdf7e2239a97ac7488877f0693d9
# bad: [bd809af16e3ab1f8d55b3e2928c47c67e2a865d2] x86: Enable PAT to use cache mode translation tables
git bisect bad bd809af16e3ab1f8d55b3e2928c47c67e2a865d2
# good: [f5b2831d654167d77da8afbef4d2584897b12d0c] x86: Respect PAT bit when copying pte values between large and normal pages
git bisect good f5b2831d654167d77da8afbef4d2584897b12d0c
# first bad commit: [bd809af16e3ab1f8d55b3e2928c47c67e2a865d2] x86: Enable PAT to use cache mode translation tables

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