v2 -> v3: * patch 1-4: Abandoned * patch 5: - Eliminate "flags" (suggested by Uladzislau Rezki) - Based on https://lkml.org/lkml/2019/6/6/455 and https://lkml.org/lkml/2019/7/3/661 v1 -> v2: * patch 3: Rename __find_vmap_area to __search_va_in_busy_tree instead of __search_va_from_busy_tree. * patch 5: Add motivation and necessary test data to the commit message. * patch 5: Let va->flags use only some low bits of va_start instead of completely overwriting va_start. The current implementation of struct vmap_area wasted space. After applying this commit, sizeof(struct vmap_area) has been reduced from 11 words to 8 words. Pengfei Li (1): Modify struct vmap_area to reduce its size include/linux/vmalloc.h | 20 +++++++++++++------- mm/vmalloc.c | 24 ++++++++++-------------- 2 files changed, 23 insertions(+), 21 deletions(-) -- 2.21.0
