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Don't preempt without good reason

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This commit is contained in:
Ruihan Li
2024-10-31 10:00:19 +08:00
committed by Tate, Hongliang Tian
parent 19b13d88e2
commit 5233827160
6 changed files with 32 additions and 16 deletions
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8
ostd/src/boot/smp.rs
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@ -15,6 +15,7 @@ use crate::{
page::{self, meta::KernelMeta, ContPages},
PAGE_SIZE,
},
task::Task,
};
pub(crate) static AP_BOOT_INFO: Once<ApBootInfo> = Once::new();
@ -37,7 +38,7 @@ struct PerApInfo {
boot_stack_pages: ContPages<KernelMeta>,
}
static AP_LATE_ENTRY: Once<fn() -> !> = Once::new();
static AP_LATE_ENTRY: Once<fn()> = Once::new();
/// Boot all application processors.
///
@ -104,7 +105,7 @@ pub fn boot_all_aps() {
///
/// Once the entry function is registered, all the application processors
/// will jump to the entry function immediately.
pub fn register_ap_entry(entry: fn() -> !) {
pub fn register_ap_entry(entry: fn()) {
AP_LATE_ENTRY.call_once(|| entry);
}
@ -150,6 +151,9 @@ fn ap_early_entry(local_apic_id: u32) -> ! {
let ap_late_entry = AP_LATE_ENTRY.wait();
ap_late_entry();
Task::yield_now();
unreachable!("`yield_now` in the boot context should not return");
}
fn wait_for_all_aps_started() {