Commit 1bb26611 authored by Tobias Schramm's avatar Tobias Schramm
Browse files

arm64: Workaround to shorten boot time on the Pinebook Pro 

Initialization of crypto_rsa and the tracing subsystem take forever (>300 s)
during early boot. In the case of crypto_rsa it seems to come down to
some misscalculation of crypto test runtime based on dmips specified
in the dt. Loading the module later is way faster (0.5 s). The only
drawback of this is that signing of the mac80211 regdb must also be
disabled.
I do currently not have any idea why initialization of the tracing framework
is taking such a long time (30 s).
However, this workaround is very much non-invasive since it concernes only
the kernel config.
This patch shortens the boot time from more than 3 minutes down to
just 30 seconds even from an micro SD card.
parent 1e39ae7d

arch/arm64/configs/pinebook_pro_defconfig

+14 −11
Original line number Diff line number Diff line
@@ -608,6 +608,8 @@ CONFIG_BT_MRVL=m 
CONFIG_BT_MRVL_SDIO=m

CONFIG_BT_ATH3K=m

CONFIG_CFG80211=m

CONFIG_CFG80211_CERTIFICATION_ONUS=y

# CONFIG_CFG80211_REQUIRE_SIGNED_REGDB is not set

CONFIG_CFG80211_DEBUGFS=y

CONFIG_MAC80211=m

CONFIG_MAC80211_MESH=y
@@ -661,7 +663,6 @@ CONFIG_MTD_PHYSMAP_OF=y 
CONFIG_MTD_RAW_NAND=y

CONFIG_MTD_SPI_NOR=y

CONFIG_MTD_UBI=m

CONFIG_OF_CONFIGFS=y

CONFIG_BLK_DEV_NULL_BLK=m

CONFIG_ZRAM=m

CONFIG_BLK_DEV_UMEM=m
@@ -1089,7 +1090,6 @@ CONFIG_IWLDVM=m 
CONFIG_IWLMVM=m

CONFIG_IWLWIFI_DEBUG=y

CONFIG_IWLWIFI_DEBUGFS=y

# CONFIG_IWLWIFI_DEVICE_TRACING is not set

CONFIG_HOSTAP=m

CONFIG_HOSTAP_FIRMWARE=y

CONFIG_HOSTAP_PLX=m
@@ -1846,6 +1846,9 @@ CONFIG_SND_MIXER_OSS=m 
CONFIG_SND_PCM_OSS=m

CONFIG_SND_HRTIMER=m

# CONFIG_SND_SUPPORT_OLD_API is not set

CONFIG_SND_VERBOSE_PRINTK=y

CONFIG_SND_DEBUG=y

CONFIG_SND_DEBUG_VERBOSE=y

CONFIG_SND_SEQUENCER=m

CONFIG_SND_SEQ_DUMMY=m

CONFIG_SND_SEQUENCER_OSS=m
@@ -1946,10 +1949,12 @@ CONFIG_SND_SOC_ROCKCHIP_RT5645=m 
CONFIG_SND_SOC_RK3288_HDMI_ANALOG=m

CONFIG_SND_SOC_RK3399_GRU_SOUND=m

CONFIG_SND_SOC_CROS_EC_CODEC=m

CONFIG_SND_SOC_ES8316=m

CONFIG_SND_SOC_MSM8916_WCD_ANALOG=y

CONFIG_SND_SOC_MSM8916_WCD_DIGITAL=y

CONFIG_SND_SOC_PCM3168A_I2C=m

CONFIG_SND_SOC_RK3328=m

CONFIG_SND_SOC_SIMPLE_AMPLIFIER=m

CONFIG_SND_SIMPLE_CARD=m

CONFIG_SND_AUDIO_GRAPH_CARD=m

CONFIG_HID_BATTERY_STRENGTH=y
@@ -2419,7 +2424,6 @@ CONFIG_FB_TFT_UC1611=m 
CONFIG_FB_TFT_UC1701=m

CONFIG_FB_TFT_UPD161704=m

CONFIG_FB_TFT_WATTEROTT=m

CONFIG_FB_FLEX=m

CONFIG_USB_WUSB_CBAF=m

CONFIG_USB_HWA_HCD=m

CONFIG_UWB=m
@@ -2965,6 +2969,11 @@ CONFIG_CRYPTO_DEV_CCP=y 
CONFIG_CRYPTO_DEV_ROCKCHIP=m

CONFIG_CRYPTO_DEV_SAFEXCEL=m

CONFIG_CRYPTO_DEV_CCREE=m

CONFIG_ASYMMETRIC_KEY_TYPE=y

CONFIG_ASYMMETRIC_PUBLIC_KEY_SUBTYPE=y

CONFIG_X509_CERTIFICATE_PARSER=y

CONFIG_PKCS7_MESSAGE_PARSER=y

CONFIG_SYSTEM_TRUSTED_KEYRING=y

# CONFIG_XZ_DEC_X86 is not set

# CONFIG_XZ_DEC_POWERPC is not set

# CONFIG_XZ_DEC_IA64 is not set
@@ -2981,18 +2990,12 @@ CONFIG_MAGIC_SYSRQ_DEFAULT_ENABLE=0x0 
CONFIG_DEBUG_VM=y

CONFIG_SOFTLOCKUP_DETECTOR=y

CONFIG_SCHEDSTATS=y

CONFIG_STACKTRACE=y

CONFIG_DEBUG_LIST=y

CONFIG_RCU_TORTURE_TEST=m

CONFIG_RCU_CPU_STALL_TIMEOUT=60

# CONFIG_RCU_TRACE is not set

# CONFIG_FUNCTION_GRAPH_TRACER is not set

CONFIG_SCHED_TRACER=y

CONFIG_FTRACE_SYSCALLS=y

CONFIG_STACK_TRACER=y

CONFIG_BLK_DEV_IO_TRACE=y

# CONFIG_UPROBE_EVENTS is not set

CONFIG_FUNCTION_PROFILER=y

CONFIG_RING_BUFFER_BENCHMARK=m

# CONFIG_FTRACE is not set

# CONFIG_RUNTIME_TESTING_MENU is not set

CONFIG_KGDB=y

CONFIG_KGDB_TESTS=y