diff options
| author | Lance Yang <ioworker0@gmail.com> | 2024-06-28 16:07:49 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-07-13 01:52:13 +0300 |
| commit | f216c845f3c772e54d27fe209fd300b10e7bf54a (patch) | |
| tree | dfd229f371f1e32a8dd636d1687131f85dd423c8 /mm | |
| parent | d468f1b8cb8e4c28ebb2282af2dd4021b60df7cb (diff) | |
| download | linux-f216c845f3c772e54d27fe209fd300b10e7bf54a.tar.xz | |
mm: add per-order mTHP split counters
Patch series "mm: introduce per-order mTHP split counters", v3.
At present, the split counters in THP statistics no longer include
PTE-mapped mTHP. Therefore, we want to introduce per-order mTHP split
counters to monitor the frequency of mTHP splits. This will assist
developers in better analyzing and optimizing system performance.
/sys/kernel/mm/transparent_hugepage/hugepages-<size>/stats
split
split_failed
split_deferred
This patch (of 2):
Currently, the split counters in THP statistics no longer include
PTE-mapped mTHP. Therefore, we propose introducing per-order mTHP split
counters to monitor the frequency of mTHP splits. This will help
developers better analyze and optimize system performance.
/sys/kernel/mm/transparent_hugepage/hugepages-<size>/stats
split
split_failed
split_deferred
[ioworker0@gmail.com: make things more readable, per Barry and Baolin]
Link: https://lkml.kernel.org/r/20240704012905.42971-2-ioworker0@gmail.com
[ioworker0@gmail.com: use == for `order' test, per David]
Link: https://lkml.kernel.org/r/20240705113119.82210-1-ioworker0@gmail.com
Link: https://lkml.kernel.org/r/20240704012905.42971-1-ioworker0@gmail.com
Link: https://lkml.kernel.org/r/20240704012905.42971-2-ioworker0@gmail.com
Link: https://lkml.kernel.org/r/20240628130750.73097-1-ioworker0@gmail.com
Link: https://lkml.kernel.org/r/20240628130750.73097-2-ioworker0@gmail.com
Signed-off-by: Mingzhe Yang <mingzhe.yang@ly.com>
Signed-off-by: Lance Yang <ioworker0@gmail.com>
Reviewed-by: Ryan Roberts <ryan.roberts@arm.com>
Acked-by: Barry Song <baohua@kernel.org>
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Acked-by: David Hildenbrand <david@redhat.com>
Cc: Bang Li <libang.li@antgroup.com>
Cc: Yang Shi <shy828301@gmail.com>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/huge_memory.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 954c63575917..17fb072a0ca1 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -559,6 +559,9 @@ DEFINE_MTHP_STAT_ATTR(swpout_fallback, MTHP_STAT_SWPOUT_FALLBACK); DEFINE_MTHP_STAT_ATTR(file_alloc, MTHP_STAT_FILE_ALLOC); DEFINE_MTHP_STAT_ATTR(file_fallback, MTHP_STAT_FILE_FALLBACK); DEFINE_MTHP_STAT_ATTR(file_fallback_charge, MTHP_STAT_FILE_FALLBACK_CHARGE); +DEFINE_MTHP_STAT_ATTR(split, MTHP_STAT_SPLIT); +DEFINE_MTHP_STAT_ATTR(split_failed, MTHP_STAT_SPLIT_FAILED); +DEFINE_MTHP_STAT_ATTR(split_deferred, MTHP_STAT_SPLIT_DEFERRED); static struct attribute *stats_attrs[] = { &anon_fault_alloc_attr.attr, @@ -569,6 +572,9 @@ static struct attribute *stats_attrs[] = { &file_alloc_attr.attr, &file_fallback_attr.attr, &file_fallback_charge_attr.attr, + &split_attr.attr, + &split_failed_attr.attr, + &split_deferred_attr.attr, NULL, }; @@ -3068,7 +3074,7 @@ int split_huge_page_to_list_to_order(struct page *page, struct list_head *list, XA_STATE_ORDER(xas, &folio->mapping->i_pages, folio->index, new_order); struct anon_vma *anon_vma = NULL; struct address_space *mapping = NULL; - bool is_thp = folio_test_pmd_mappable(folio); + int order = folio_order(folio); int extra_pins, ret; pgoff_t end; bool is_hzp; @@ -3253,8 +3259,9 @@ out_unlock: i_mmap_unlock_read(mapping); out: xas_destroy(&xas); - if (is_thp) + if (order == HPAGE_PMD_ORDER) count_vm_event(!ret ? THP_SPLIT_PAGE : THP_SPLIT_PAGE_FAILED); + count_mthp_stat(order, !ret ? MTHP_STAT_SPLIT : MTHP_STAT_SPLIT_FAILED); return ret; } @@ -3307,6 +3314,7 @@ void deferred_split_folio(struct folio *folio) if (list_empty(&folio->_deferred_list)) { if (folio_test_pmd_mappable(folio)) count_vm_event(THP_DEFERRED_SPLIT_PAGE); + count_mthp_stat(folio_order(folio), MTHP_STAT_SPLIT_DEFERRED); list_add_tail(&folio->_deferred_list, &ds_queue->split_queue); ds_queue->split_queue_len++; #ifdef CONFIG_MEMCG |