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Redesign reschedule points, allow one operation to reschedule many cpus at once
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This commit is contained in:
Kamil Kowalczyk
2026-02-18 23:16:03 +01:00
parent ae0a6024da
commit f103bdd739
39 changed files with 376 additions and 223 deletions
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66
kernel/amd64/intr.c
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@@ -8,6 +8,8 @@
#include <libk/std.h>
#include <libk/string.h>
#include <m/syscall_defs.h>
#include <mm/liballoc.h>
#include <proc/reschedule.h>
#include <sys/debug.h>
#include <sys/smp.h>
#include <sys/spin.h>
@@ -155,9 +157,34 @@ static void amd64_intr_exception (struct saved_regs* regs) {
regs->rbx);
if (regs->cs == (GDT_UCODE | 0x03)) {
struct cpu* reschedule_cpu;
if (proc_kill (thiscpu->proc_current, &reschedule_cpu) == PROC_NEED_RESCHEDULE)
cpu_request_sched (reschedule_cpu);
struct reschedule_ctx rctx = {.entries = NULL, .lock = SPIN_LOCK_INIT};
proc_kill (thiscpu->proc_current, &rctx);
bool reschedule_thiscpu = false;
spin_lock (&rctx.lock);
struct list_node_link *node, *tmp;
list_foreach (rctx.entries, node, tmp) {
struct reschedule_entry* entry = list_entry (node, struct reschedule_entry, link);
struct cpu* cpu = entry->cpu;
if (cpu != thiscpu) {
cpu_request_sched (cpu);
} else {
reschedule_thiscpu = true;
}
list_remove (rctx.entries, &entry->link);
free (entry);
}
spin_unlock (&rctx.lock);
if (reschedule_thiscpu) {
proc_sched ();
}
} else {
spin ();
}
@@ -185,12 +212,35 @@ void amd64_intr_handler (void* stack_ptr) {
struct irq* irq = irq_find (regs->trap);
if (irq != NULL) {
struct cpu* reschedule_cpu = NULL;
bool reschedule = irq->func (&reschedule_cpu, irq->arg, stack_ptr);
if (irq == NULL)
return;
if (reschedule)
cpu_request_sched (reschedule_cpu);
struct reschedule_ctx rctx = {.entries = NULL, .lock = SPIN_LOCK_INIT};
irq->func (irq->arg, stack_ptr, &rctx);
bool reschedule_thiscpu = false;
spin_lock (&rctx.lock);
struct list_node_link *node, *tmp;
list_foreach (rctx.entries, node, tmp) {
struct reschedule_entry* entry = list_entry (node, struct reschedule_entry, link);
struct cpu* cpu = entry->cpu;
if (cpu != thiscpu) {
cpu_request_sched (cpu);
} else {
reschedule_thiscpu = true;
}
list_remove (rctx.entries, &entry->link);
free (entry);
}
spin_unlock (&rctx.lock);
if (reschedule_thiscpu) {
proc_sched ();
}
}
}