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ANDROID: vendor_hook: add hooks in dm_bufio.c

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1. android_vh_dm_bufio_shrink_scan_bypass
To adjust dm_bufio-buffer shrinker's policy in some cases.
2. cleanup_old_buffers_bypass
To adjust the policy of dm_bufio-buffer periodic eviction
in some cases.

Bug: 281467813

Signed-off-by: Peifeng Li <lipeifeng@oppo.com>
Change-Id: I29a9d91d18d2e279170533db83b59cfc3b17ebe2
This commit is contained in:
Peifeng Li
2023-05-08 14:52:00 +08:00
parent f03258701d
commit 64c7044d39
3 changed files with 27 additions and 0 deletions
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2
drivers/android/vendor_hooks.c
View File

@@ -275,6 +275,8 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_commit_creds);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_exit_creds);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_override_creds);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_revert_creds);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_dm_bufio_shrink_scan_bypass);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_cleanup_old_buffers_bypass);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_record_mutex_lock_starttime);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_record_rtmutex_lock_starttime);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_record_rwsem_lock_starttime);

17
drivers/md/dm-bufio.c
View File

@@ -19,6 +19,8 @@
#include <linux/rbtree.h>
#include <linux/stacktrace.h>
#include <trace/hooks/mm.h>
#define DM_MSG_PREFIX "bufio"
/*
@@ -1683,6 +1685,13 @@ static void shrink_work(struct work_struct *w)
static unsigned long dm_bufio_shrink_scan(struct shrinker *shrink, struct shrink_control *sc)
{
struct dm_bufio_client *c;
bool bypass = false;
trace_android_vh_dm_bufio_shrink_scan_bypass(
dm_bufio_current_allocated,
&bypass);
if (bypass)
return 0;
c = container_of(shrink, struct dm_bufio_client, shrinker);
atomic_long_add(sc->nr_to_scan, &c->need_shrink);
@@ -2009,6 +2018,14 @@ static void cleanup_old_buffers(void)
{
unsigned long max_age_hz = get_max_age_hz();
struct dm_bufio_client *c;
bool bypass = false;
trace_android_vh_cleanup_old_buffers_bypass(
dm_bufio_current_allocated,
&max_age_hz,
&bypass);
if (bypass)
return;
mutex_lock(&dm_bufio_clients_lock);

8
include/trace/hooks/mm.h
View File

@@ -126,6 +126,14 @@ DECLARE_HOOK(android_vh_save_track_hash,
DECLARE_HOOK(android_vh_vmpressure,
TP_PROTO(struct mem_cgroup *memcg, bool *bypass),
TP_ARGS(memcg, bypass));
DECLARE_HOOK(android_vh_dm_bufio_shrink_scan_bypass,
TP_PROTO(unsigned long dm_bufio_current_allocated, bool *bypass),
TP_ARGS(dm_bufio_current_allocated, bypass));
DECLARE_HOOK(android_vh_cleanup_old_buffers_bypass,
TP_PROTO(unsigned long dm_bufio_current_allocated,
unsigned long *max_age_hz,
bool *bypass),
TP_ARGS(dm_bufio_current_allocated, max_age_hz, bypass));
DECLARE_HOOK(android_vh_mem_cgroup_alloc,
TP_PROTO(struct mem_cgroup *memcg),
TP_ARGS(memcg));