page_alloc.shuffle=1 + CONFIG_PROVE_LOCKING=y = arm64 hang

[Qian Cai]

https://raw.githubusercontent.com/cailca/linux-mm/master/arm64.config

Booting an arm64 ThunderX2 server with page_alloc.shuffle=1 [1] +
CONFIG_PROVE_LOCKING=yÂresults in hanging.

[1] https://lore.kernel.org/linux-mm/154899811208.3165233.17623209031065121886.s
tgit@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx/

...
[ÂÂ125.142689][ÂÂÂÂT1] arm-smmu-v3 arm-smmu-v3.2.auto: option mask 0x2
[ÂÂ125.149687][ÂÂÂÂT1] arm-smmu-v3 arm-smmu-v3.2.auto: ias 44-bit, oas 44-bit
(features 0x0000170d)
[ÂÂ125.165198][ÂÂÂÂT1] arm-smmu-v3 arm-smmu-v3.2.auto: allocated 524288 entries
for cmdq
[ÂÂ125.239425][ [ÂÂ125.251484][ÂÂÂÂT1] arm-smmu-v3 arm-smmu-v3.3.auto: option
mask 0x2
[ÂÂ125.258233][ÂÂÂÂT1] arm-smmu-v3 arm-smmu-v3.3.auto: ias 44-bit, oas 44-bit
(features 0x0000170d)
[ÂÂ125.282750][ÂÂÂÂT1] arm-smmu-v3 arm-smmu-v3.3.auto: allocated 524288 entries
for cmdq
[ÂÂ125.320097][ÂÂÂÂT1] arm-smmu-v3 arm-smmu-v3.3.auto: allocated 524288 entries
for evtq
[ÂÂ125.332667][ÂÂÂÂT1] arm-smmu-v3 arm-smmu-v3.4.auto: option mask 0x2
[ÂÂ125.339427][ÂÂÂÂT1] arm-smmu-v3 arm-smmu-v3.4.auto: ias 44-bit, oas 44-bit
(features 0x0000170d)
[ÂÂ125.354846][ÂÂÂÂT1] arm-smmu-v3 arm-smmu-v3.4.auto: allocated 524288 entries
for cmdq
[ÂÂ125.375295][ÂÂÂÂT1] arm-smmu-v3 arm-smmu-v3.4.auto: allocated 524288 entries
for evtq
[ÂÂ125.387371][ÂÂÂÂT1] arm-smmu-v3 arm-smmu-v3.5.auto: option mask 0x2
[ÂÂ125.393955][ÂÂÂÂT1] arm-smmu-v3 arm-smmu-v3.5.auto: ias 44-bit, oas 44-bit
(features 0x0000170d)
[ÂÂ125.522605][ÂÂÂÂT1] arm-smmu-v3 arm-smmu-v3.5.auto: allocated 524288 entries
for cmdq
[ÂÂ125.543338][ÂÂÂÂT1] arm-smmu-v3 arm-smmu-v3.5.auto: allocated 524288 entries
for evtq
[ÂÂ126.694742][ÂÂÂÂT1] EFI Variables Facility v0.08 2004-May-17
[ÂÂ126.799291][ÂÂÂÂT1] NET: Registered protocol family 17
[ÂÂ126.978632][ÂÂÂÂT1] zswap: loaded using pool lzo/zbud
[ÂÂ126.989168][ÂÂÂÂT1] kmemleak: Kernel memory leak detector initialized
[ÂÂ126.989191][ T1577] kmemleak: Automatic memory scanning thread started
[ÂÂ127.044079][ T1335] pcieport 0000:0f:00.0: Adding to iommu group 0
[ÂÂ127.388074][ÂÂÂÂT1] Freeing unused kernel memory: 22528K
[ÂÂ133.527005][ÂÂÂÂT1] Checked W+X mappings: passed, no W+X pages found
[ÂÂ133.533474][ÂÂÂÂT1] Run /init as init process
[ÂÂ133.727196][ÂÂÂÂT1] systemd[1]: System time before build time, advancing
clock.
[ÂÂ134.576021][ T1587] modprobe (1587) used greatest stack depth: 27056 bytes
left
[ÂÂ134.764026][ÂÂÂÂT1] systemd[1]: systemd 239 running in system mode. (+PAM
+AUDIT +SELINUX +IMA -APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT
+GNUTLS +ACL +XZ +LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD +IDN2 -IDN +PCRE2 default-
hierarchy=legacy)
[ÂÂ134.799044][ÂÂÂÂT1] systemd[1]: Detected architecture arm64.
[ÂÂ134.804818][ÂÂÂÂT1] systemd[1]: Running in initial RAM disk.
<...hang...>

Fix it by either set page_alloc.shuffle=0 or CONFIG_PROVE_LOCKING=n which allow
it to continue successfully.


[ÂÂ121.093846][ÂÂÂÂT1] systemd[1]: Set hostname to <hpe-apollo-cn99xx>.
[ÂÂ123.157524][ÂÂÂÂT1] random: systemd: uninitialized urandom read (16 bytes
read)
[ÂÂ123.168562][ÂÂÂÂT1] systemd[1]: Listening on Journal Socket.
[ÂÂOKÂÂ] Listening on Journal Socket.
[ÂÂ123.203932][ÂÂÂÂT1] random: systemd: uninitialized urandom read (16 bytes
read)
[ÂÂ123.212813][ÂÂÂÂT1] systemd[1]: Listening on udev Kernel Socket.
[ÂÂOKÂÂ] Listening on udev Kernel Socket.
...