[Survey] SWAP for Galaxy Note (Note9, Note10, Note20)

[leemgs]

Release Date: Galaxy Flagship Device (Galaxy Note Series)

• 2018: Galaxy Note09 (SM-N9600)
• 2019: Galaxy Note10 (SM-N970F)
• 2020: Galaxy Note20 (SM-N980F)
• 2021: Galaxy Note21 (SM-N***)

SWAP Feature per Galaxy Note models

In the case of Samsung Galaxy phones, They have introduced SWAP features to improve the launching time of the Android applications on Smartphones that are limited with specified memory capacity (e.g., 512MB, 1GB, 1.5GB, 2GB, 4GB, 8GB, 12GB).

Galaxy Note 9 (SM-N9600)

• Release: Aug-2018
• OS: Linux 4.9.186
• Platform: Android 10
• https://github.com/leemgs/SM-N9600/blob/main/Kernel/arch/arm64/configs/crownqlte_chn_open_defconfig#L532
• Config

# CONFIG_ZRAM is not set
CONFIG_SWAP=y
CONFIG_MEMCG_SWAP=y
CONFIG_MEMCG_SWAP_ENABLED=y
CONFIG_MEMCG_FORCE_USE_VM_SWAPPINESS=y
CONFIG_FRONTSWAP=y
CONFIG_ZSWAP=y
CONFIG_ZSWAP_MIGRATION_SUPPORT=y
# CONFIG_ZSWAP_ENABLE_WRITEBACK is not set
# CONFIG_ZSWAP_SAME_PAGE_SHARING is not set
CONFIG_ZPOOL=y
CONFIG_INCREASE_MAXIMUM_SWAPPINESS=y
CONFIG_FIX_INACTIVE_RATIO=y
# CONFIG_SWAP_ENABLE_READAHEAD is not set
# CONFIG_ZRAM is not set

Galaxy Note 10 (SM-N970F)

• Release: Aug-2019
• OS: Linux 4.14.113
• Platform: Android 10
• https://github.com/leemgs/SM-N970F/blob/main/Kernel/arch/arm64/configs/exynos9820-d1_defconfig
• Config

CONFIG_ZRAM=y
CONFIG_SWAP=y
CONFIG_MEMCG_SWAP=y
CONFIG_MEMCG_SWAP_ENABLED=y
CONFIG_MEMCG_FORCE_USE_VM_SWAPPINESS=y
# CONFIG_ARCH_WANTS_THP_SWAP is not set
CONFIG_CLEANCACHE=y
# CONFIG_FRONTSWAP is not set
CONFIG_INCREASE_MAXIMUM_SWAPPINESS=y

Galaxy Note 20 (SM-N980F)

• Release: Aug-2020
• OS: Linux 4.19.87
• Platform: Android 10
• https://github.com/leemgs/SM-N980F/blob/main/Kernel/arch/arm64/configs/exynos9830-c1slte_defconfig
• Config

CONFIG_ZRAM=y
# CONFIG_ZRAM_WRITEBACK is not set
# CONFIG_ZRAM_MEMORY_TRACKING is not set
CONFIG_SWAP=y
CONFIG_MEMCG_SWAP=y
CONFIG_MEMCG_SWAP_ENABLED=y
CONFIG_MEMCG_FORCE_USE_VM_SWAPPINESS=y
# CONFIG_FRONTSWAP is not set
CONFIG_PROCESS_RECLAIM=y
CONFIG_INCREASE_MAXIMUM_SWAPPINESS=y

Galaxy Note 21 (SM-N***)

• Release: Aug-2021
• OS: Linux x.xx
• Platform: Android 11
• https://github.com/leemgs/..............
• Config