From cfc9ce66d9de166451db186f925e0b62020da21d Mon Sep 17 00:00:00 2001
From: Andreas Kling <kling@serenityos.org>
Date: Wed, 12 Jan 2022 21:50:16 +0100
Subject: [PATCH] Kernel: Skip unnecessary TLB flush when growing kmalloc heap

When adding entirely new page table mappings, we don't need to flush
the TLB since they were not present before.
---
 Kernel/Heap/kmalloc.cpp | 2 --
 1 file changed, 2 deletions(-)

diff --git a/Kernel/Heap/kmalloc.cpp b/Kernel/Heap/kmalloc.cpp
index 5f8800acdb..43b3ecabd7 100644
--- a/Kernel/Heap/kmalloc.cpp
+++ b/Kernel/Heap/kmalloc.cpp
@@ -267,8 +267,6 @@ struct KmallocGlobalData {
             pte->set_present(true);
         }
 
-        MM.flush_tlb(&MM.kernel_page_directory(), new_subheap_base, new_subheap_size / PAGE_SIZE);
-
         add_subheap(new_subheap_base.as_ptr(), new_subheap_size);
         return true;
     }