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ANDROID: vendor_hooks: add hooks in mem_cgroup subsystem

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Add hooks to tune memory policy based on mem_cgroup.

Bug: 192052083

Signed-off-by: Liujie Xie <xieliujie@oppo.com>
Change-Id: Ica1a5409eed86fbd466edd2c7557f94972a40175
This commit is contained in:
Liujie Xie 2021-07-03 12:09:04 +08:00 • committed by Suren Baghdasaryan
commit 1cdcf76b15
2 changed files with 22 additions and 0 deletions
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16
include/trace/hooks/mm.h
View file

@ -101,6 +101,22 @@ struct mem_cgroup;
DECLARE_HOOK(android_vh_vmpressure,
TP_PROTO(struct mem_cgroup *memcg, bool *bypass),
TP_ARGS(memcg, bypass));
DECLARE_HOOK(android_vh_mem_cgroup_alloc,
TP_PROTO(struct mem_cgroup *memcg),
TP_ARGS(memcg));
DECLARE_HOOK(android_vh_mem_cgroup_free,
TP_PROTO(struct mem_cgroup *memcg),
TP_ARGS(memcg));
DECLARE_HOOK(android_vh_mem_cgroup_id_remove,
TP_PROTO(struct mem_cgroup *memcg),
TP_ARGS(memcg));
struct cgroup_subsys_state;
DECLARE_HOOK(android_vh_mem_cgroup_css_online,
TP_PROTO(struct cgroup_subsys_state *css, struct mem_cgroup *memcg),
TP_ARGS(css, memcg));
DECLARE_HOOK(android_vh_mem_cgroup_css_offline,
TP_PROTO(struct cgroup_subsys_state *css, struct mem_cgroup *memcg),
TP_ARGS(css, memcg));
/* macro versions of hooks are no longer required */
#endif /* _TRACE_HOOK_MM_H */

6
mm/memcontrol.c
View file

@ -67,6 +67,7 @@
#include <linux/uaccess.h>
#include <trace/events/vmscan.h>
#include <trace/hooks/mm.h>
struct cgroup_subsys memory_cgrp_subsys __read_mostly;
EXPORT_SYMBOL(memory_cgrp_subsys);
@ -5148,6 +5149,7 @@ static DEFINE_IDR(mem_cgroup_idr);
static void mem_cgroup_id_remove(struct mem_cgroup *memcg)
{
if (memcg->id.id > 0) {
trace_android_vh_mem_cgroup_id_remove(memcg);
idr_remove(&mem_cgroup_idr, memcg->id.id);
memcg->id.id = 0;
}
@ -5244,6 +5246,7 @@ static void __mem_cgroup_free(struct mem_cgroup *memcg)
{
int node;
trace_android_vh_mem_cgroup_free(memcg);
for_each_node(node)
free_mem_cgroup_per_node_info(memcg, node);
free_percpu(memcg->vmstats_percpu);
@ -5327,6 +5330,7 @@ static struct mem_cgroup *mem_cgroup_alloc(void)
memcg->deferred_split_queue.split_queue_len = 0;
#endif
idr_replace(&mem_cgroup_idr, memcg, memcg->id.id);
trace_android_vh_mem_cgroup_alloc(memcg);
return memcg;
fail:
mem_cgroup_id_remove(memcg);
@ -5416,6 +5420,7 @@ static int mem_cgroup_css_online(struct cgroup_subsys_state *css)
/* Online state pins memcg ID, memcg ID pins CSS */
refcount_set(&memcg->id.ref, 1);
css_get(css);
trace_android_vh_mem_cgroup_css_online(css, memcg);
return 0;
}
@ -5424,6 +5429,7 @@ static void mem_cgroup_css_offline(struct cgroup_subsys_state *css)
struct mem_cgroup *memcg = mem_cgroup_from_css(css);
struct mem_cgroup_event *event, *tmp;
trace_android_vh_mem_cgroup_css_offline(css, memcg);
/*
* Unregister events and notify userspace.
* Notify userspace about cgroup removing only after rmdir of cgroup