The quilt patch titled Subject: mm: add per-order mTHP swpin counters has been removed from the -mm tree. Its filename was mm-add-per-order-mthp-swpin-counters.patch This patch was dropped because it was merged into the mm-stable branch of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm ------------------------------------------------------ From: Barry Song <v-songbaohua@xxxxxxxx> Subject: mm: add per-order mTHP swpin counters Date: Sat, 26 Oct 2024 21:24:23 +1300 This helps profile the sizes of folios being swapped in. Currently, only mTHP swap-out is being counted. The new interface can be found at: /sys/kernel/mm/transparent_hugepage/hugepages-<size>/stats swpin For example, cat /sys/kernel/mm/transparent_hugepage/hugepages-64kB/stats/swpin 12809 cat /sys/kernel/mm/transparent_hugepage/hugepages-32kB/stats/swpin 4763 [v-songbaohua@xxxxxxxx: add a blank line in doc] Link: https://lkml.kernel.org/r/20241030233423.80759-1-21cnbao@xxxxxxxxx Link: https://lkml.kernel.org/r/20241026082423.26298-1-21cnbao@xxxxxxxxx Signed-off-by: Barry Song <v-songbaohua@xxxxxxxx> Reviewed-by: Baolin Wang <baolin.wang@xxxxxxxxxxxxxxxxx> Acked-by: David Hildenbrand <david@xxxxxxxxxx> Cc: Chris Li <chrisl@xxxxxxxxxx> Cc: Yosry Ahmed <yosryahmed@xxxxxxxxxx> Cc: "Huang, Ying" <ying.huang@xxxxxxxxx> Cc: Kairui Song <kasong@xxxxxxxxxxx> Cc: Ryan Roberts <ryan.roberts@xxxxxxx> Cc: Kanchana P Sridhar <kanchana.p.sridhar@xxxxxxxxx> Cc: Usama Arif <usamaarif642@xxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- Documentation/admin-guide/mm/transhuge.rst | 4 ++++ include/linux/huge_mm.h | 1 + mm/huge_memory.c | 3 +++ mm/page_io.c | 3 +++ 4 files changed, 11 insertions(+) --- a/Documentation/admin-guide/mm/transhuge.rst~mm-add-per-order-mthp-swpin-counters +++ a/Documentation/admin-guide/mm/transhuge.rst @@ -534,6 +534,10 @@ zswpout is incremented every time a huge page is swapped out to zswap in one piece without splitting. +swpin + is incremented every time a huge page is swapped in from a non-zswap + swap device in one piece. + swpout is incremented every time a huge page is swapped out to a non-zswap swap device in one piece without splitting. --- a/include/linux/huge_mm.h~mm-add-per-order-mthp-swpin-counters +++ a/include/linux/huge_mm.h @@ -120,6 +120,7 @@ enum mthp_stat_item { MTHP_STAT_ANON_FAULT_FALLBACK, MTHP_STAT_ANON_FAULT_FALLBACK_CHARGE, MTHP_STAT_ZSWPOUT, + MTHP_STAT_SWPIN, MTHP_STAT_SWPOUT, MTHP_STAT_SWPOUT_FALLBACK, MTHP_STAT_SHMEM_ALLOC, --- a/mm/huge_memory.c~mm-add-per-order-mthp-swpin-counters +++ a/mm/huge_memory.c @@ -616,6 +616,7 @@ DEFINE_MTHP_STAT_ATTR(anon_fault_alloc, DEFINE_MTHP_STAT_ATTR(anon_fault_fallback, MTHP_STAT_ANON_FAULT_FALLBACK); DEFINE_MTHP_STAT_ATTR(anon_fault_fallback_charge, MTHP_STAT_ANON_FAULT_FALLBACK_CHARGE); DEFINE_MTHP_STAT_ATTR(zswpout, MTHP_STAT_ZSWPOUT); +DEFINE_MTHP_STAT_ATTR(swpin, MTHP_STAT_SWPIN); DEFINE_MTHP_STAT_ATTR(swpout, MTHP_STAT_SWPOUT); DEFINE_MTHP_STAT_ATTR(swpout_fallback, MTHP_STAT_SWPOUT_FALLBACK); #ifdef CONFIG_SHMEM @@ -635,6 +636,7 @@ static struct attribute *anon_stats_attr &anon_fault_fallback_charge_attr.attr, #ifndef CONFIG_SHMEM &zswpout_attr.attr, + &swpin_attr.attr, &swpout_attr.attr, &swpout_fallback_attr.attr, #endif @@ -666,6 +668,7 @@ static struct attribute_group file_stats static struct attribute *any_stats_attrs[] = { #ifdef CONFIG_SHMEM &zswpout_attr.attr, + &swpin_attr.attr, &swpout_attr.attr, &swpout_fallback_attr.attr, #endif --- a/mm/page_io.c~mm-add-per-order-mthp-swpin-counters +++ a/mm/page_io.c @@ -495,6 +495,7 @@ static void sio_read_complete(struct kio for (p = 0; p < sio->pages; p++) { struct folio *folio = page_folio(sio->bvec[p].bv_page); + count_mthp_stat(folio_order(folio), MTHP_STAT_SWPIN); count_memcg_folio_events(folio, PSWPIN, folio_nr_pages(folio)); folio_mark_uptodate(folio); folio_unlock(folio); @@ -589,6 +590,7 @@ static void swap_read_folio_bdev_sync(st * attempt to access it in the page fault retry time check. */ get_task_struct(current); + count_mthp_stat(folio_order(folio), MTHP_STAT_SWPIN); count_memcg_folio_events(folio, PSWPIN, folio_nr_pages(folio)); count_vm_events(PSWPIN, folio_nr_pages(folio)); submit_bio_wait(&bio); @@ -605,6 +607,7 @@ static void swap_read_folio_bdev_async(s bio->bi_iter.bi_sector = swap_folio_sector(folio); bio->bi_end_io = end_swap_bio_read; bio_add_folio_nofail(bio, folio, folio_size(folio), 0); + count_mthp_stat(folio_order(folio), MTHP_STAT_SWPIN); count_memcg_folio_events(folio, PSWPIN, folio_nr_pages(folio)); count_vm_events(PSWPIN, folio_nr_pages(folio)); submit_bio(bio); _ Patches currently in -mm which might be from v-songbaohua@xxxxxxxx are