genode/repos/base-foc/patches/0012-Flush-the-TLB-after-idle-operation.patch
Stefan Kalkowski 811410fdbb foc: update to current github version (fix #3402)
Instead of hosting our outdated own fork, this commit now uses kernkonzept's
nowadays available github source repositories. This hopefully simplifies
updates, or cherry-picking single fixes.
2019-06-13 12:22:48 +02:00

30 lines
982 B
Diff

From 43cd446fe9bcba67a7d7312b14004e9063343a89 Mon Sep 17 00:00:00 2001
From: Christian Prochaska <christian.prochaska@genode-labs.com>
Date: Wed, 28 Aug 2013 19:53:23 +0200
Subject: [PATCH 12/15] Flush the TLB after idle operation
While a CPU executes the idle thread, it receives no cross-CPU TLB flush
requests. Therefore, the TLB needs to get flushed when leaving the idle
thread to compensate for any missed flush requests.
Fixes ssumpf/foc#9.
---
kernel/fiasco/src/kern/kernel_thread.cpp | 1 +
1 file changed, 1 insertion(+)
diff --git a/kernel/fiasco/src/kern/kernel_thread.cpp b/kernel/fiasco/src/kern/kernel_thread.cpp
index 348fde9c..7e4a0d31 100644
--- a/kernel/fiasco/src/kern/kernel_thread.cpp
+++ b/kernel/fiasco/src/kern/kernel_thread.cpp
@@ -182,6 +182,7 @@ Kernel_thread::idle_op()
arch_tickless_idle(cpu);
Mem_space::enable_tlb(cpu);
+ Mem_unit::tlb_flush();
Rcu::leave_idle(cpu);
Timer_tick::enable(cpu);
}
--
2.11.0