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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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44
kernel/proc/mail.c
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@@ -1,3 +1,5 @@
#include <libk/list.h>
#include <libk/minmax.h>
#include <libk/std.h>
#include <libk/string.h>
#include <mm/liballoc.h>
@@ -8,9 +10,8 @@
#include <sys/debug.h>
#include <sys/smp.h>
bool proc_cleanup_resource_mail (struct proc_resource* resource, struct cpu** reschedule_cpu) {
void proc_cleanup_resource_mail (struct proc_resource* resource, struct reschedule_ctx* rctx) {
struct proc_mail* mail = &resource->u.mail;
bool reschedule = PROC_NO_RESCHEDULE;
spin_lock (&mail->resource->lock);
@@ -29,7 +30,7 @@ bool proc_cleanup_resource_mail (struct proc_resource* resource, struct cpu** re
spin_unlock (&mail->send_sq.lock);
spin_unlock (&mail->resource->lock);
reschedule = reschedule || proc_sq_resume (suspended_proc, sq_entry, reschedule_cpu);
proc_sq_resume (suspended_proc, sq_entry, rctx);
spin_lock (&mail->resource->lock);
spin_lock (&mail->send_sq.lock);
@@ -38,13 +39,18 @@ bool proc_cleanup_resource_mail (struct proc_resource* resource, struct cpu** re
spin_unlock (&mail->send_sq.lock);
spin_unlock (&mail->resource->lock);
return reschedule;
}
bool proc_mail_send (struct proc* proc, struct proc_mail* mail, struct cpu** reschedule_cpu,
void proc_mail_send (struct proc* proc, struct proc_mail* mail, struct reschedule_ctx* rctx,
void* data, size_t data_size) {
spin_lock (&mail->resource->lock);
/* mail full */
if (mail->pending_mesg != NULL) {
proc_sq_suspend (proc, &mail->send_sq, &mail->resource->lock, rctx);
return;
}
spin_lock (&mail->recv_sq.lock);
/* if receiver available, hand off directly */
@@ -57,40 +63,33 @@ bool proc_mail_send (struct proc* proc, struct proc_mail* mail, struct cpu** res
spin_unlock (&mail->recv_sq.lock);
spin_unlock (&mail->resource->lock);
spin_lock (&proc->lock);
spin_lock (&resumed_proc->lock);
if (resumed_proc->mail_recv_buffer != NULL) {
size_t copy_size =
(data_size < resumed_proc->mail_recv_size) ? data_size : resumed_proc->mail_recv_size;
size_t copy_size = min (data_size, resumed_proc->mail_recv_size);
memcpy (resumed_proc->mail_recv_buffer, data, copy_size);
resumed_proc->mail_recv_buffer = NULL;
resumed_proc->mail_recv_size = 0;
}
spin_unlock (&proc->lock);
spin_unlock (&resumed_proc->lock);
return proc_sq_resume (resumed_proc, sq_entry, reschedule_cpu);
proc_sq_resume (resumed_proc, sq_entry, rctx);
return;
}
spin_unlock (&mail->recv_sq.lock);
/* mail full */
if (mail->pending_mesg != NULL) {
return proc_sq_suspend (proc, &mail->send_sq, &mail->resource->lock, reschedule_cpu);
}
/* mail is empty and nobody is waiting */
mail->pending_mesg = malloc (data_size);
memcpy (mail->pending_mesg, data, data_size);
mail->pending_mesg_size = data_size;
spin_unlock (&mail->resource->lock);
return PROC_NO_RESCHEDULE;
}
bool proc_mail_receive (struct proc* proc, struct proc_mail* mail, struct cpu** reschedule_cpu,
void proc_mail_receive (struct proc* proc, struct proc_mail* mail, struct reschedule_ctx* rctx,
void* recv_buffer, size_t recv_size) {
spin_lock (&proc->lock);
proc->mail_recv_buffer = recv_buffer;
@@ -118,15 +117,16 @@ bool proc_mail_receive (struct proc* proc, struct proc_mail* mail, struct cpu**
spin_unlock (&mail->send_sq.lock);
spin_unlock (&mail->resource->lock);
return proc_sq_resume (resumed_proc, sq_entry, reschedule_cpu);
proc_sq_resume (resumed_proc, sq_entry, rctx);
return;
}
spin_unlock (&mail->send_sq.lock);
spin_unlock (&mail->resource->lock);
return PROC_NO_RESCHEDULE;
return;
}
/* nothing to receive */
return proc_sq_suspend (proc, &mail->recv_sq, &mail->resource->lock, reschedule_cpu);
proc_sq_suspend (proc, &mail->recv_sq, &mail->resource->lock, rctx);
}