diff options
| author | Kanchana P Sridhar <kanchana.p.sridhar@intel.com> | 2024-09-30 22:32:22 -0700 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-11-11 00:26:43 -0800 |
| commit | 0c560dd86040556a9e55d88229d9295672428c78 (patch) | |
| tree | c3b3164175132c26446bd03d696f37e748592935 /mm/page_io.c | |
| parent | b7c0ccdfbafdec98699ddb6f164beebf16f0bc45 (diff) | |
| download | lwn-0c560dd86040556a9e55d88229d9295672428c78.tar.gz lwn-0c560dd86040556a9e55d88229d9295672428c78.zip | |
mm: swap: count successful large folio zswap stores in hugepage zswpout stats
Added a new MTHP_STAT_ZSWPOUT entry to the sysfs transparent_hugepage
stats so that successful large folio zswap stores can be accounted under
the per-order sysfs "zswpout" stats:
/sys/kernel/mm/transparent_hugepage/hugepages-*kB/stats/zswpout
Other non-zswap swap device swap-out events will be counted under
the existing sysfs "swpout" stats:
/sys/kernel/mm/transparent_hugepage/hugepages-*kB/stats/swpout
Also, added documentation for the newly added sysfs per-order hugepage
"zswpout" stats. The documentation clarifies that only non-zswap swapouts
will be accounted in the existing "swpout" stats.
Link: https://lkml.kernel.org/r/20241001053222.6944-8-kanchana.p.sridhar@intel.com
Signed-off-by: Kanchana P Sridhar <kanchana.p.sridhar@intel.com>
Reviewed-by: Nhat Pham <nphamcs@gmail.com>
Cc: Chengming Zhou <chengming.zhou@linux.dev>
Cc: "Huang, Ying" <ying.huang@intel.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Shakeel Butt <shakeel.butt@linux.dev>
Cc: Usama Arif <usamaarif642@gmail.com>
Cc: Wajdi Feghali <wajdi.k.feghali@intel.com>
Cc: Yosry Ahmed <yosryahmed@google.com>
Cc: "Zou, Nanhai" <nanhai.zou@intel.com>
Cc: Barry Song <21cnbao@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/page_io.c')
| -rw-r--r-- | mm/page_io.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/mm/page_io.c b/mm/page_io.c index 39e8be23bd95..e9be4b436fd8 100644 --- a/mm/page_io.c +++ b/mm/page_io.c @@ -277,6 +277,7 @@ int swap_writepage(struct page *page, struct writeback_control *wbc) swap_zeromap_folio_clear(folio); } if (zswap_store(folio)) { + count_mthp_stat(folio_order(folio), MTHP_STAT_ZSWPOUT); folio_unlock(folio); return 0; } |