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ANDROID: vendor_hooks: Add hook in shrink_node_memcgs

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Add vendor hook in shrink_node_memcgs to adjust whether
to skip memory reclamation of memcg.

Bug: 226482420
Signed-off-by: Liujie Xie <xieliujie@oppo.com>
Change-Id: I925856353e63c5a821027de4f8476c833e21b982
This commit is contained in:
Liujie Xie 2022-06-01 15:38:17 +08:00 committed by Suren Baghdasaryan
parent d9f1ddef3a
commit 1839b89cb9
3 changed files with 9 additions and 0 deletions
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1
drivers/android/vendor_hooks.c
View File

@ -546,3 +546,4 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_cma_alloc_retry);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_ksys_umount);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_do_group_exit);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_suitable_migration_target_bypass);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_shrink_node_memcgs);

3
include/trace/hooks/vmscan.h
View File

@ -86,6 +86,9 @@ DECLARE_HOOK(android_vh_do_folio_trylock,
TP_PROTO(struct folio *folio, struct rw_semaphore *sem,
bool *got_lock, bool *skip),
TP_ARGS(folio, sem, got_lock, skip));
DECLARE_HOOK(android_vh_shrink_node_memcgs,
TP_PROTO(struct mem_cgroup *memcg, bool *skip),
TP_ARGS(memcg, skip));
#endif /* _TRACE_HOOK_VMSCAN_H */
/* This part must be outside protection */
#include <trace/define_trace.h>

5
mm/vmscan.c
View File

@ -6626,6 +6626,7 @@ static void shrink_node_memcgs(pg_data_t *pgdat, struct scan_control *sc)
struct lruvec *lruvec = mem_cgroup_lruvec(memcg, pgdat);
unsigned long reclaimed;
unsigned long scanned;
bool skip = false;
/*
* This loop can become CPU-bound when target memcgs
@ -6635,6 +6636,10 @@ static void shrink_node_memcgs(pg_data_t *pgdat, struct scan_control *sc)
*/
cond_resched();
trace_android_vh_shrink_node_memcgs(memcg, &skip);
if (skip)
continue;
mem_cgroup_calculate_protection(target_memcg, memcg);
if (mem_cgroup_below_min(target_memcg, memcg)) {