Hello, RFC this is 4.3 material, but I wanted to publish it sooner to gain responses and to settle it down before 4.3 merge window opens. in short, this series tweaks zsmalloc's compaction and adds auto-compaction support. auto-compaction is not aimed to replace manual compaction, intead it's supposed to be good enough. yet it surely slows down zsmalloc in some scenarious. whilst simple un-tar test didn't show any significant performance difference quote from commit 0007: this test copies a 1.3G linux kernel tar to mounted zram disk, and extracts it. w/auto-compaction: cat /sys/block/zram0/mm_stat 1171456 26006 86016 0 86016 32781 0 time tar xf linux-3.10.tar.gz -C linux real 0m16.970s user 0m15.247s sys 0m8.477s du -sh linux 2.0G linux cat /sys/block/zram0/mm_stat 3547353088 2993384270 3011088384 0 3011088384 24310 108 ===================================================================== w/o auto compaction: cat /sys/block/zram0/mm_stat 1171456 26000 81920 0 81920 32781 0 time tar xf linux-3.10.tar.gz -C linux real 0m16.983s user 0m15.267s sys 0m8.417s du -sh linux 2.0G linux cat /sys/block/zram0/mm_stat 3548917760 2993566924 3011317760 0 3011317760 23928 0 Sergey Senozhatsky (10): zsmalloc: drop unused variable `nr_to_migrate' zsmalloc: always keep per-class stats zsmalloc: introduce zs_can_compact() function zsmalloc: cosmetic compaction code adjustments zsmalloc: add `num_migrated' to zs_pool zsmalloc: move compaction functions zsmalloc: introduce auto-compact support zsmalloc: export zs_pool `num_migrated' zram: remove `num_migrated' from zram_stats zsmalloc: lower ZS_ALMOST_FULL waterline drivers/block/zram/zram_drv.c | 12 +- drivers/block/zram/zram_drv.h | 1 - include/linux/zsmalloc.h | 1 + mm/zsmalloc.c | 578 +++++++++++++++++++++--------------------- 4 files changed, 296 insertions(+), 296 deletions(-) -- 2.4.2.337.gfae46aa -- 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>