From ea724f45295b80a86f8a04b7d9b3eaac99366da8 Mon Sep 17 00:00:00 2001
From: Ruihan Li <lrh2000@pku.edu.cn>
Date: Sat, 22 Mar 2025 23:53:42 +0800
Subject: [PATCH] Remove the time handler to flush TLBs

---
 ostd/src/boot/smp.rs |  2 --
 ostd/src/lib.rs      |  1 -
 ostd/src/mm/tlb.rs   | 11 -----------
 3 files changed, 14 deletions(-)

diff --git a/ostd/src/boot/smp.rs b/ostd/src/boot/smp.rs
index 2d237996..37a1b304 100644
--- a/ostd/src/boot/smp.rs
+++ b/ostd/src/boot/smp.rs
@@ -136,8 +136,6 @@ fn ap_early_entry(local_apic_id: u32) -> ! {
 
     crate::arch::irq::enable_local();
 
-    crate::mm::tlb::register_timer_callbacks_this_cpu();
-
     // SAFETY: this function is only called once on this AP.
     unsafe {
         crate::mm::kspace::activate_kernel_page_table();
diff --git a/ostd/src/lib.rs b/ostd/src/lib.rs
index ed48d4f6..cb0cae0f 100644
--- a/ostd/src/lib.rs
+++ b/ostd/src/lib.rs
@@ -106,7 +106,6 @@ unsafe fn init() {
     boot::init_after_heap();
 
     mm::dma::init();
-    mm::tlb::register_timer_callbacks_this_cpu();
 
     unsafe { arch::late_init_on_bsp() };
 
diff --git a/ostd/src/mm/tlb.rs b/ostd/src/mm/tlb.rs
index e9e2b302..edf5798c 100644
--- a/ostd/src/mm/tlb.rs
+++ b/ostd/src/mm/tlb.rs
@@ -205,17 +205,6 @@ impl TlbFlushOp {
     }
 }
 
-/// Registers the timer callbacks for the TLB flush operations.
-///
-/// We check if there's pending TLB flush requests on each CPU in the timer
-/// callback. This is to ensure that the TLB flush requests are processed
-/// ultimately in case the IPIs are not received.
-///
-/// This function should be done once for each CPU during the initialization.
-pub(crate) fn register_timer_callbacks_this_cpu() {
-    crate::timer::register_callback(do_remote_flush);
-}
-
 // The queues of pending requests on each CPU.
 //
 // Lock ordering: lock FLUSH_OPS before PAGE_KEEPER.