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Fix TLB coherence of KVirtArea a bit

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This commit is contained in:
Zhang Junyang
2025-03-24 19:51:50 +08:00
committed by Tate, Hongliang Tian
parent 26c50ea335
commit c142afdb31
4 changed files with 126 additions and 162 deletions
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13
ostd/src/task/kernel_stack.rs
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@ -55,9 +55,6 @@ impl KernelStack {
// non-negligible TLB and mapping overhead on task creation. This could
// be improved by caching/reusing kernel stacks with a pool.
pub fn new_with_guard_page() -> Result<Self> {
let mut new_kvirt_area = KVirtArea::<Tracked>::new(KERNEL_STACK_SIZE + 4 * PAGE_SIZE);
let mapped_start = new_kvirt_area.range().start + 2 * PAGE_SIZE;
let mapped_end = mapped_start + KERNEL_STACK_SIZE;
let pages = FrameAllocOptions::new()
.zeroed(false)
.alloc_segment_with(KERNEL_STACK_SIZE / PAGE_SIZE, |_| KernelStackMeta)?;
@ -66,8 +63,14 @@ impl KernelStack {
cache: CachePolicy::Writeback,
priv_flags: PrivilegedPageFlags::empty(),
};
new_kvirt_area.map_pages(mapped_start..mapped_end, pages, prop);
let new_kvirt_area = KVirtArea::<Tracked>::map_pages(
KERNEL_STACK_SIZE + 4 * PAGE_SIZE,
2 * PAGE_SIZE,
pages.into_iter(),
prop,
);
let mapped_start = new_kvirt_area.range().start + 2 * PAGE_SIZE;
let mapped_end = mapped_start + KERNEL_STACK_SIZE;
Ok(Self {
kvirt_area: new_kvirt_area,
tlb_coherent: AtomicCpuSet::new(CpuSet::new_empty()),