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/page_idle.c | 33 ++++++++++-----------------------
1 files changed, 10 insertions(+), 23 deletions(-)
diff --git a/kernel/mm/page_idle.c b/kernel/mm/page_idle.c
index 52ed59b..b561323 100644
--- a/kernel/mm/page_idle.c
+++ b/kernel/mm/page_idle.c
@@ -1,9 +1,10 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/init.h>
-#include <linux/bootmem.h>
+#include <linux/memblock.h>
#include <linux/fs.h>
#include <linux/sysfs.h>
#include <linux/kobject.h>
+#include <linux/memory_hotplug.h>
#include <linux/mm.h>
#include <linux/mmzone.h>
#include <linux/pagemap.h>
@@ -30,24 +31,20 @@
*/
static struct page *page_idle_get_page(unsigned long pfn)
{
- struct page *page;
- struct zone *zone;
+ struct page *page = pfn_to_online_page(pfn);
+ pg_data_t *pgdat;
- if (!pfn_valid(pfn))
- return NULL;
-
- page = pfn_to_page(pfn);
if (!page || !PageLRU(page) ||
!get_page_unless_zero(page))
return NULL;
- zone = page_zone(page);
- spin_lock_irq(zone_lru_lock(zone));
+ pgdat = page_pgdat(page);
+ spin_lock_irq(&pgdat->lru_lock);
if (unlikely(!PageLRU(page))) {
put_page(page);
page = NULL;
}
- spin_unlock_irq(zone_lru_lock(zone));
+ spin_unlock_irq(&pgdat->lru_lock);
return page;
}
@@ -95,10 +92,10 @@
static void page_idle_clear_pte_refs(struct page *page)
{
/*
- * Since rwc.arg is unused, rwc is effectively immutable, so we
- * can make it static const to save some cycles and stack.
+ * Since rwc.try_lock is unused, rwc is effectively immutable, so we
+ * can make it static to save some cycles and stack.
*/
- static const struct rmap_walk_control rwc = {
+ static struct rmap_walk_control rwc = {
.rmap_one = page_idle_clear_pte_refs_one,
.anon_lock = page_lock_anon_vma_read,
};
@@ -213,16 +210,6 @@
.bin_attrs = page_idle_bin_attrs,
.name = "page_idle",
};
-
-#ifndef CONFIG_64BIT
-static bool need_page_idle(void)
-{
- return true;
-}
-struct page_ext_operations page_idle_ops = {
- .need = need_page_idle,
-};
-#endif
static int __init page_idle_init(void)
{
--
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