From: Joonsoo Kim <iamjoonsoo....@lge.com> Changes from v3 o fix module build problem o make zram_dedup_enabled() statically return false if CONFIG_ZRAM_DEDUP=n
Changes from v2 o rebase to latest zram code o manage alloc/free of the zram_entry in zram_drv.c o remove useless RB_CLEAR_NODE o set RO permission tor use_deup sysfs entry if CONFIG_ZRAM_DEDUP=n Changes from v1 o reogranize dedup specific functions o support Kconfig on/off o update zram documents o compare all the entries with same checksum (patch #4) This patchset implements deduplication feature in zram. Motivation is to save memory usage by zram. There are detailed description about motivation and experimental results on patch #2 so please refer it. Thanks. Joonsoo Kim (4): zram: introduce zram_entry to prepare dedup functionality zram: implement deduplication in zram zram: make deduplication feature optional zram: compare all the entries with same checksum for deduplication Documentation/ABI/testing/sysfs-block-zram | 10 ++ Documentation/blockdev/zram.txt | 3 + drivers/block/zram/Kconfig | 14 ++ drivers/block/zram/Makefile | 3 +- drivers/block/zram/zram_dedup.c | 254 +++++++++++++++++++++++++++++ drivers/block/zram/zram_dedup.h | 45 +++++ drivers/block/zram/zram_drv.c | 184 +++++++++++++++++---- drivers/block/zram/zram_drv.h | 32 +++- 8 files changed, 507 insertions(+), 38 deletions(-) create mode 100644 drivers/block/zram/zram_dedup.c create mode 100644 drivers/block/zram/zram_dedup.h -- 2.7.4
