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Message-Id: <20220831031951.43152-6-zhengqi.arch@bytedance.com>
Date: Wed, 31 Aug 2022 11:19:49 +0800
From: Qi Zheng <zhengqi.arch@...edance.com>
To: akpm@...ux-foundation.org, shy828301@...il.com,
willy@...radead.org, vbabka@...e.cz, hannes@...xchg.org,
minchan@...nel.org, rppt@...nel.org
Cc: linux-mm@...ck.org, linux-kernel@...r.kernel.org,
Qi Zheng <zhengqi.arch@...edance.com>
Subject: [PATCH v2 5/7] ksm: convert ksm_mm_slot.mm_list to ksm_mm_slot.mm_node
In order to use common struct mm_slot, convert ksm_mm_slot.mm_list
to ksm_mm_slot.mm_node in advance, no functional change.
Signed-off-by: Qi Zheng <zhengqi.arch@...edance.com>
---
mm/ksm.c | 40 ++++++++++++++++++++--------------------
1 file changed, 20 insertions(+), 20 deletions(-)
diff --git a/mm/ksm.c b/mm/ksm.c
index 3937111f9ab8..8c52aa7e0a02 100644
--- a/mm/ksm.c
+++ b/mm/ksm.c
@@ -114,13 +114,13 @@
/**
* struct ksm_mm_slot - ksm information per mm that is being scanned
* @link: link to the mm_slots hash list
- * @mm_list: link into the mm_slots list, rooted in ksm_mm_head
+ * @mm_node: link into the mm_slots list, rooted in ksm_mm_head
* @rmap_list: head for this mm_slot's singly-linked list of rmap_items
* @mm: the mm that this information is valid for
*/
struct ksm_mm_slot {
struct hlist_node link;
- struct list_head mm_list;
+ struct list_head mm_node;
struct ksm_rmap_item *rmap_list;
struct mm_struct *mm;
};
@@ -231,7 +231,7 @@ static LIST_HEAD(migrate_nodes);
static DEFINE_HASHTABLE(mm_slots_hash, MM_SLOTS_HASH_BITS);
static struct ksm_mm_slot ksm_mm_head = {
- .mm_list = LIST_HEAD_INIT(ksm_mm_head.mm_list),
+ .mm_node = LIST_HEAD_INIT(ksm_mm_head.mm_node),
};
static struct ksm_scan ksm_scan = {
.mm_slot = &ksm_mm_head,
@@ -980,8 +980,8 @@ static int unmerge_and_remove_all_rmap_items(void)
int err = 0;
spin_lock(&ksm_mmlist_lock);
- ksm_scan.mm_slot = list_entry(ksm_mm_head.mm_list.next,
- struct ksm_mm_slot, mm_list);
+ ksm_scan.mm_slot = list_entry(ksm_mm_head.mm_node.next,
+ struct ksm_mm_slot, mm_node);
spin_unlock(&ksm_mmlist_lock);
for (mm_slot = ksm_scan.mm_slot; mm_slot != &ksm_mm_head;
@@ -1005,11 +1005,11 @@ static int unmerge_and_remove_all_rmap_items(void)
mmap_read_unlock(mm);
spin_lock(&ksm_mmlist_lock);
- ksm_scan.mm_slot = list_entry(mm_slot->mm_list.next,
- struct ksm_mm_slot, mm_list);
+ ksm_scan.mm_slot = list_entry(mm_slot->mm_node.next,
+ struct ksm_mm_slot, mm_node);
if (ksm_test_exit(mm)) {
hash_del(&mm_slot->link);
- list_del(&mm_slot->mm_list);
+ list_del(&mm_slot->mm_node);
spin_unlock(&ksm_mmlist_lock);
free_mm_slot(mm_slot);
@@ -2250,7 +2250,7 @@ static struct ksm_rmap_item *scan_get_next_rmap_item(struct page **page)
struct vma_iterator vmi;
int nid;
- if (list_empty(&ksm_mm_head.mm_list))
+ if (list_empty(&ksm_mm_head.mm_node))
return NULL;
slot = ksm_scan.mm_slot;
@@ -2291,7 +2291,7 @@ static struct ksm_rmap_item *scan_get_next_rmap_item(struct page **page)
root_unstable_tree[nid] = RB_ROOT;
spin_lock(&ksm_mmlist_lock);
- slot = list_entry(slot->mm_list.next, struct ksm_mm_slot, mm_list);
+ slot = list_entry(slot->mm_node.next, struct ksm_mm_slot, mm_node);
ksm_scan.mm_slot = slot;
spin_unlock(&ksm_mmlist_lock);
/*
@@ -2364,8 +2364,8 @@ static struct ksm_rmap_item *scan_get_next_rmap_item(struct page **page)
remove_trailing_rmap_items(ksm_scan.rmap_list);
spin_lock(&ksm_mmlist_lock);
- ksm_scan.mm_slot = list_entry(slot->mm_list.next,
- struct ksm_mm_slot, mm_list);
+ ksm_scan.mm_slot = list_entry(slot->mm_node.next,
+ struct ksm_mm_slot, mm_node);
if (ksm_scan.address == 0) {
/*
* We've completed a full scan of all vmas, holding mmap_lock
@@ -2377,7 +2377,7 @@ static struct ksm_rmap_item *scan_get_next_rmap_item(struct page **page)
* mmap_lock then protects against race with MADV_MERGEABLE).
*/
hash_del(&slot->link);
- list_del(&slot->mm_list);
+ list_del(&slot->mm_node);
spin_unlock(&ksm_mmlist_lock);
free_mm_slot(slot);
@@ -2426,7 +2426,7 @@ static void ksm_do_scan(unsigned int scan_npages)
static int ksmd_should_run(void)
{
- return (ksm_run & KSM_RUN_MERGE) && !list_empty(&ksm_mm_head.mm_list);
+ return (ksm_run & KSM_RUN_MERGE) && !list_empty(&ksm_mm_head.mm_node);
}
static int ksm_scan_thread(void *nothing)
@@ -2523,7 +2523,7 @@ int __ksm_enter(struct mm_struct *mm)
return -ENOMEM;
/* Check ksm_run too? Would need tighter locking */
- needs_wakeup = list_empty(&ksm_mm_head.mm_list);
+ needs_wakeup = list_empty(&ksm_mm_head.mm_node);
spin_lock(&ksm_mmlist_lock);
insert_to_mm_slots_hash(mm, mm_slot);
@@ -2538,9 +2538,9 @@ int __ksm_enter(struct mm_struct *mm)
* missed: then we might as well insert at the end of the list.
*/
if (ksm_run & KSM_RUN_UNMERGE)
- list_add_tail(&mm_slot->mm_list, &ksm_mm_head.mm_list);
+ list_add_tail(&mm_slot->mm_node, &ksm_mm_head.mm_node);
else
- list_add_tail(&mm_slot->mm_list, &ksm_scan.mm_slot->mm_list);
+ list_add_tail(&mm_slot->mm_node, &ksm_scan.mm_slot->mm_node);
spin_unlock(&ksm_mmlist_lock);
set_bit(MMF_VM_MERGEABLE, &mm->flags);
@@ -2571,11 +2571,11 @@ void __ksm_exit(struct mm_struct *mm)
if (mm_slot && ksm_scan.mm_slot != mm_slot) {
if (!mm_slot->rmap_list) {
hash_del(&mm_slot->link);
- list_del(&mm_slot->mm_list);
+ list_del(&mm_slot->mm_node);
easy_to_free = 1;
} else {
- list_move(&mm_slot->mm_list,
- &ksm_scan.mm_slot->mm_list);
+ list_move(&mm_slot->mm_node,
+ &ksm_scan.mm_slot->mm_node);
}
}
spin_unlock(&ksm_mmlist_lock);
--
2.20.1
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