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Fix the nested bottom half

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This commit is contained in:
Ruihan Li
2024-12-01 23:11:49 +08:00
committed by Tate, Hongliang Tian
parent 0cb2ea562e
commit 28edc57dd0
4 changed files with 102 additions and 86 deletions
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26
kernel/comps/softirq/src/lib.rs
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@ -119,37 +119,15 @@ static ENABLED_MASK: AtomicU8 = AtomicU8::new(0);
cpu_local_cell! {
static PENDING_MASK: u8 = 0;
static IS_ENABLED: bool = true;
}
/// Enables softirq in current processor.
fn enable_softirq_local() {
IS_ENABLED.store(true);
}
/// Disables softirq in current processor.
fn disable_softirq_local() {
IS_ENABLED.store(false);
}
/// Checks whether the softirq is enabled in current processor.
fn is_softirq_enabled() -> bool {
IS_ENABLED.load()
}
/// Processes pending softirqs.
///
/// The processing instructions will iterate for `SOFTIRQ_RUN_TIMES` times. If any softirq
/// is raised during the iteration, it will be processed.
pub(crate) fn process_pending() {
fn process_pending() {
const SOFTIRQ_RUN_TIMES: u8 = 5;
if !is_softirq_enabled() {
return;
}
disable_softirq_local();
for _i in 0..SOFTIRQ_RUN_TIMES {
let mut action_mask = {
let pending_mask = PENDING_MASK.load();
@ -166,6 +144,4 @@ pub(crate) fn process_pending() {
action_mask &= action_mask - 1;
}
}
enable_softirq_local();
}