From: xu xin <xu.xin16@xxxxxxxxxx> Before enabling use_zero_pages by setting /sys/kernel/mm/ksm/ use_zero_pages to 1, pages_sharing of KSM is basically accurate. But after enabling use_zero_pages, all empty pages that are merged with kernel zero page are not counted in pages_sharing or pages_shared. That is because the rmap_items of these ksm zero pages are not appended to The Stable Tree of KSM. We need to add the count of empty pages to let users know how many empty pages are merged with kernel zero page(s). Please see the subsequent patches for details. *** BLURB HERE *** xu xin (3): ksm: abstract the function try_to_get_old_rmap_item ksm: add the accounting of zero pages merged by use_zero_pages ksm: add zero_pages_merged in Documentation Documentation/admin-guide/mm/ksm.rst | 10 ++- mm/ksm.c | 122 +++++++++++++++++++++------ 2 files changed, 106 insertions(+), 26 deletions(-) -- 2.25.1
