From b42497e05e0baaab99dcba4e71fee0df0ed79d18 Mon Sep 17 00:00:00 2001
From: apio <blobs.trading@gmail.com>
Date: Wed, 20 Sep 2023 19:49:13 +0200
Subject: [PATCH] kernel: Start clearing caches when free memory is lower than
 1MiB

This is done to avoid returning ENOMEM errors when cache memory can still be reclaimed.
---
 kernel/src/memory/MemoryManager.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/kernel/src/memory/MemoryManager.cpp b/kernel/src/memory/MemoryManager.cpp
index fc530b16..018c284d 100644
--- a/kernel/src/memory/MemoryManager.cpp
+++ b/kernel/src/memory/MemoryManager.cpp
@@ -157,6 +157,13 @@ namespace MemoryManager
         used_mem += ARCH_PAGE_SIZE;
         free_mem -= ARCH_PAGE_SIZE;
 
+        if (free_mem < 1024 * 1024)
+        {
+            // Less than 1 MiB of free memory! Let's start clearing caches...
+            kwarnln("Less than 1 MiB of free memory, clearing caches to try to gain extra memory");
+            Scheduler::signal_oom_thread();
+        }
+
         return index * ARCH_PAGE_SIZE;
     }