From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file
---
kernel/mm/swapfile.c | 22 +++++++++++++++++++++-
1 files changed, 21 insertions(+), 1 deletions(-)
diff --git a/kernel/mm/swapfile.c b/kernel/mm/swapfile.c
index b3cc174..cc1ce66 100644
--- a/kernel/mm/swapfile.c
+++ b/kernel/mm/swapfile.c
@@ -668,12 +668,19 @@
{
int nid;
+ assert_spin_locked(&p->lock);
for_each_node(nid)
plist_del(&p->avail_lists[nid], &swap_avail_heads[nid]);
}
static void del_from_avail_list(struct swap_info_struct *p)
{
+ bool skip = false;
+
+ trace_android_vh_del_from_avail_list(p, &skip);
+ if (skip)
+ return;
+
spin_lock(&swap_avail_lock);
__del_from_avail_list(p);
spin_unlock(&swap_avail_lock);
@@ -699,6 +706,11 @@
static void add_to_avail_list(struct swap_info_struct *p)
{
int nid;
+ bool skip = false;
+
+ trace_android_vh_add_to_avail_list(p, &skip);
+ if (skip)
+ return;
spin_lock(&swap_avail_lock);
for_each_node(nid) {
@@ -1111,6 +1123,7 @@
goto check_out;
pr_debug("scan_swap_map of si %d failed to find offset\n",
si->type);
+ cond_resched();
spin_lock(&swap_avail_lock);
nextsi:
@@ -2629,8 +2642,8 @@
spin_unlock(&swap_lock);
goto out_dput;
}
- del_from_avail_list(p);
spin_lock(&p->lock);
+ del_from_avail_list(p);
if (p->prio < 0) {
struct swap_info_struct *si = p;
int nid;
@@ -3392,6 +3405,8 @@
if (swap_flags & SWAP_FLAG_PREFER)
prio =
(swap_flags & SWAP_FLAG_PRIO_MASK) >> SWAP_FLAG_PRIO_SHIFT;
+
+ trace_android_vh_swap_avail_heads_init(swap_avail_heads);
enable_swap_info(p, prio, swap_map, cluster_info, frontswap_map);
trace_android_vh_init_swap_info_struct(p, swap_avail_heads);
@@ -3846,6 +3861,7 @@
{
struct swap_info_struct *si, *next;
int nid = page_to_nid(page);
+ bool skip = false;
if (!(gfp_mask & __GFP_IO))
return;
@@ -3860,6 +3876,10 @@
if (current->throttle_queue)
return;
+ trace_android_vh___cgroup_throttle_swaprate(nid, &skip);
+ if (skip)
+ return;
+
spin_lock(&swap_avail_lock);
plist_for_each_entry_safe(si, next, &swap_avail_heads[nid],
avail_lists[nid]) {
--
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