From: Domenico Cerasuolo cerasuolodomenico@gmail.com
[ Upstream commit 7108cc3f765cafd48a6a35f8add140beaecfa75b ]
Since zswap now writes back pages from memcg-specific LRUs, we now need a new stat to show writebacks count for each memcg.
[nphamcs@gmail.com: rename ZSWP_WB to ZSWPWB] Link: https://lkml.kernel.org/r/20231205193307.2432803-1-nphamcs@gmail.com Link: https://lkml.kernel.org/r/20231130194023.4102148-5-nphamcs@gmail.com Suggested-by: Nhat Pham nphamcs@gmail.com Signed-off-by: Domenico Cerasuolo cerasuolodomenico@gmail.com Signed-off-by: Nhat Pham nphamcs@gmail.com Tested-by: Bagas Sanjaya bagasdotme@gmail.com Reviewed-by: Yosry Ahmed yosryahmed@google.com Cc: Chris Li chrisl@kernel.org Cc: Dan Streetman ddstreet@ieee.org Cc: Johannes Weiner hannes@cmpxchg.org Cc: Michal Hocko mhocko@kernel.org Cc: Muchun Song muchun.song@linux.dev Cc: Roman Gushchin roman.gushchin@linux.dev Cc: Seth Jennings sjenning@redhat.com Cc: Shakeel Butt shakeelb@google.com Cc: Shuah Khan shuah@kernel.org Cc: Vitaly Wool vitaly.wool@konsulko.com Signed-off-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Leon Huang Fu leon.huangfu@shopee.com --- include/linux/vm_event_item.h | 1 + mm/memcontrol.c | 1 + mm/vmstat.c | 1 + mm/zswap.c | 4 ++++ 4 files changed, 7 insertions(+)
diff --git a/include/linux/vm_event_item.h b/include/linux/vm_event_item.h index 8abfa1240040..b61796a35d2b 100644 --- a/include/linux/vm_event_item.h +++ b/include/linux/vm_event_item.h @@ -145,6 +145,7 @@ enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT, #ifdef CONFIG_ZSWAP ZSWPIN, ZSWPOUT, + ZSWPWB, #endif #ifdef CONFIG_X86 DIRECT_MAP_LEVEL2_SPLIT, diff --git a/mm/memcontrol.c b/mm/memcontrol.c index c61c90ea72a4..03a984287e5b 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -700,6 +700,7 @@ static const unsigned int memcg_vm_event_stat[] = { #if defined(CONFIG_MEMCG_KMEM) && defined(CONFIG_ZSWAP) ZSWPIN, ZSWPOUT, + ZSWPWB, #endif #ifdef CONFIG_TRANSPARENT_HUGEPAGE THP_FAULT_ALLOC, diff --git a/mm/vmstat.c b/mm/vmstat.c index 57891697846b..3630c6e2bb41 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -1397,6 +1397,7 @@ const char * const vmstat_text[] = { #ifdef CONFIG_ZSWAP "zswpin", "zswpout", + "zswpwb", #endif #ifdef CONFIG_X86 "direct_map_level2_splits", diff --git a/mm/zswap.c b/mm/zswap.c index 69681b9173fd..a3459440fc31 100644 --- a/mm/zswap.c +++ b/mm/zswap.c @@ -674,6 +674,10 @@ static int zswap_reclaim_entry(struct zswap_pool *pool) goto put_unlock; }
+ if (entry->objcg) + count_objcg_event(entry->objcg, ZSWPWB); + + count_vm_event(ZSWPWB); /* * Writeback started successfully, the page now belongs to the * swapcache. Drop the entry from zswap - unless invalidate already -- 2.50.1