On Wed, Jan 22, 2025 at 2:59 AM Bharata B Rao <bharata@xxxxxxx> wrote: > While that may be true for MADV_PAGEOUT path, does the same assumption > hold good for other paths from which shrink_folio_list() gets called? shrink_folio_list() is called by three other functions, each with different batching behavior: - reclaim_clean_pages_from_list(): Doesn't do PMD batching but only processes clean pages, so it won't take the path affected by this patch. This is called from the contiguous memory allocator (cma_alloc#alloc_contig_range) - shrink_inactive_list(): Reclaims inactive pages at SWAP_CLUSTER_MAX (default 32) at a time. With this patch, we will reduce IPIs for TLB flushes by a factor of 32 in kswapd - evict_folios(): In the MGLRU case, the number of pages shrink_folio_list() processes can vary between 64 (MIN_LRU_BATCH) and 4096 (MAX_LRU_BATCH). The reduction in IPIs will vary accordingly Thanks! Vinay
