On 09/15/23 15:15, Mike Kravetz wrote: > The following series attempts to reduce amount of time spent in TLB flushing. > The idea is to batch the vmemmap modification operations for multiple hugetlb > pages. Instead of doing one or two TLB flushes for each page, we do two TLB > flushes for each batch of pages. One flush after splitting pages mapped at > the PMD level, and another after remapping vmemmap associated with all > hugetlb pages. Results of such batching are as follows: > > Joao Martins (2): > hugetlb: batch PMD split for bulk vmemmap dedup > hugetlb: batch TLB flushes when freeing vmemmap > > Johannes Weiner (1): > mm: page_alloc: remove pcppage migratetype caching fix > > Matthew Wilcox (Oracle) (3): > hugetlb: Use a folio in free_hpage_workfn() > hugetlb: Remove a few calls to page_folio() > hugetlb: Convert remove_pool_huge_page() to > remove_pool_hugetlb_folio() > > Mike Kravetz (6): > hugetlb: optimize update_and_free_pages_bulk to avoid lock cycles > hugetlb: restructure pool allocations > hugetlb: perform vmemmap optimization on a list of pages > hugetlb: perform vmemmap restoration on a list of pages > hugetlb: batch freeing of vmemmap pages > hugetlb: batch TLB flushes when restoring vmemmap > > mm/hugetlb.c | 288 ++++++++++++++++++++++++++++++++----------- > mm/hugetlb_vmemmap.c | 255 ++++++++++++++++++++++++++++++++------ > mm/hugetlb_vmemmap.h | 16 +++ > mm/page_alloc.c | 3 - > 4 files changed, 452 insertions(+), 110 deletions(-) Just realized that I should have based this on top of/taken into account this series as well: https://lore.kernel.org/linux-mm/20230913105401.519709-5-usama.arif@xxxxxxxxxxxxx/ Sorry! Changes should be minimal, but modifying the same code. -- Mike Kravetz
