It's 5th trial of zram/zsmalloc promotion. [patch 5, zram: promote zram from staging] explains why we need zram. Main reason to block promotion is there was no review of zsmalloc part while Jens already acked zram part. At that time, zsmalloc was used for zram, zcache and zswap so everybody wanted to make it general and at last, Mel reviewed it. Most of review was related to zswap dumping mechanism which can pageout compressed page into swap in runtime and zswap gives up using zsmalloc and invented a new wheel, zbud. Other reviews were not major. http://lkml.indiana.edu/hypermail/linux/kernel/1304.1/04334.html Zcache don't use zsmalloc either so only zsmalloc user is zram now. So I think there is no concern any more. Patch 1 adds new Kconfig for zram to use page table method instead of copy. Andrew suggested it. Patch 2 adds lots of commnt for zsmalloc. Patch 3 moves zsmalloc under driver/staging/zram because zram is only user for zram now. Patch 4 makes unmap_kernel_range exportable function because zsmalloc have used map_vm_area which is already exported function but zsmalloc need to use unmap_kernel_range and it should be built with module. Patch 5 moves zram from driver/staging to driver/blocks, finally. It touches mm, staging, blocks so I am not sure who is right position maintainer so I will Cc Andrw, Jens and Greg. This patch is based on next-20130813. Thanks. Minchan Kim (4): zsmalloc: add Kconfig for enabling page table method zsmalloc: move it under zram mm: export unmap_kernel_range zram: promote zram from staging Nitin Cupta (1): zsmalloc: add more comment drivers/block/Kconfig | 2 + drivers/block/Makefile | 1 + drivers/block/zram/Kconfig | 37 + drivers/block/zram/Makefile | 3 + drivers/block/zram/zram.txt | 71 ++ drivers/block/zram/zram_drv.c | 987 +++++++++++++++++++++++++++ drivers/block/zram/zsmalloc.c | 1084 ++++++++++++++++++++++++++++++ drivers/staging/Kconfig | 4 - drivers/staging/Makefile | 2 - drivers/staging/zram/Kconfig | 25 - drivers/staging/zram/Makefile | 3 - drivers/staging/zram/zram.txt | 77 --- drivers/staging/zram/zram_drv.c | 984 --------------------------- drivers/staging/zram/zram_drv.h | 125 ---- drivers/staging/zsmalloc/Kconfig | 10 - drivers/staging/zsmalloc/Makefile | 3 - drivers/staging/zsmalloc/zsmalloc-main.c | 1063 ----------------------------- drivers/staging/zsmalloc/zsmalloc.h | 43 -- include/linux/zram.h | 123 ++++ include/linux/zsmalloc.h | 52 ++ mm/vmalloc.c | 1 + 21 files changed, 2361 insertions(+), 2339 deletions(-) create mode 100644 drivers/block/zram/Kconfig create mode 100644 drivers/block/zram/Makefile create mode 100644 drivers/block/zram/zram.txt create mode 100644 drivers/block/zram/zram_drv.c create mode 100644 drivers/block/zram/zsmalloc.c delete mode 100644 drivers/staging/zram/Kconfig delete mode 100644 drivers/staging/zram/Makefile delete mode 100644 drivers/staging/zram/zram.txt delete mode 100644 drivers/staging/zram/zram_drv.c delete mode 100644 drivers/staging/zram/zram_drv.h delete mode 100644 drivers/staging/zsmalloc/Kconfig delete mode 100644 drivers/staging/zsmalloc/Makefile delete mode 100644 drivers/staging/zsmalloc/zsmalloc-main.c delete mode 100644 drivers/staging/zsmalloc/zsmalloc.h create mode 100644 include/linux/zram.h create mode 100644 include/linux/zsmalloc.h -- 1.7.9.5 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>