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Optimize trim_mappings

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This commit is contained in:
Chen Chengjun
2024-08-02 11:14:14 +08:00
committed by Tate, Hongliang Tian
parent cd9e5d11d2
commit acb4833aae
2 changed files with 11 additions and 11 deletions
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10
kernel/aster-nix/src/vm/vmar/mod.rs
View File

@ -323,8 +323,8 @@ impl Vmar_ {
.child_vmar_s
.retain(|_, child_vmar_| !child_vmar_.is_destroyed());
let mut mappings_to_remove = BTreeSet::new();
let mut mappings_to_append = BTreeMap::new();
let mut mappings_to_remove = LinkedList::new();
let mut mappings_to_append = LinkedList::new();
for vm_mapping in inner.vm_mappings.find(&range) {
let vm_mapping_range = vm_mapping.range();
@ -666,9 +666,9 @@ impl Vmar_ {
fn trim_existing_mappings(&self, trim_range: Range<usize>) -> Result<()> {
let mut inner = self.inner.lock();
let mut mappings_to_remove = BTreeSet::new();
let mut mappings_to_append = BTreeMap::new();
for vm_mapping in inner.vm_mappings.values() {
let mut mappings_to_remove = LinkedList::new();
let mut mappings_to_append = LinkedList::new();
for vm_mapping in inner.vm_mappings.find(&trim_range) {
vm_mapping.trim_mapping(
&trim_range,
&mut mappings_to_remove,

12
kernel/aster-nix/src/vm/vmar/vm_mapping.rs
View File

@ -409,8 +409,8 @@ impl VmMapping {
pub fn trim_mapping(
self: &Arc<Self>,
trim_range: &Range<usize>,
mappings_to_remove: &mut BTreeSet<Vaddr>,
mappings_to_append: &mut BTreeMap<Vaddr, Arc<VmMapping>>,
mappings_to_remove: &mut LinkedList<Vaddr>,
mappings_to_append: &mut LinkedList<(Vaddr, Arc<VmMapping>)>,
) -> Result<()> {
let map_to_addr = self.map_to_addr();
let map_size = self.map_size();
@ -421,15 +421,15 @@ impl VmMapping {
if trim_range.start <= map_to_addr && trim_range.end >= map_to_addr + map_size {
// Fast path: the whole mapping was trimed.
self.unmap(trim_range, true)?;
mappings_to_remove.insert(map_to_addr);
mappings_to_remove.push_back(map_to_addr);
return Ok(());
}
if trim_range.start <= range.start {
mappings_to_remove.insert(map_to_addr);
mappings_to_remove.push_back(map_to_addr);
if trim_range.end <= range.end {
// Overlap vm_mapping from left.
let new_map_addr = self.trim_left(trim_range.end)?;
mappings_to_append.insert(new_map_addr, self.clone());
mappings_to_append.push_back((new_map_addr, self.clone()));
} else {
// The mapping was totally destroyed.
}
@ -438,7 +438,7 @@ impl VmMapping {
// The trim range was totally inside the old mapping.
let another_mapping = Arc::new(self.try_clone()?);
let another_map_to_addr = another_mapping.trim_left(trim_range.end)?;
mappings_to_append.insert(another_map_to_addr, another_mapping);
mappings_to_append.push_back((another_map_to_addr, another_mapping));
} else {
// Overlap vm_mapping from right.
}