Bananymous/banan-os
1
1
Fork 1
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Kernel: Make F11 drop disk cache

Browse Source 
This can be useful to detect memory leaks or something
This commit is contained in:
Bananymous
2025-08-31 00:36:59 +03:00
parent 791a541381
commit da39e98adf
5 changed files with 55 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

38
kernel/kernel/FS/DevFS/FileSystem.cpp
View File

@@ -8,6 +8,7 @@
#include <kernel/FS/TmpFS/Inode.h>
#include <kernel/Input/InputDevice.h>
#include <kernel/Lock/LockGuard.h>
#include <kernel/Lock/SpinLockAsMutex.h>
#include <kernel/Process.h>
#include <kernel/Scheduler.h>
#include <kernel/Storage/StorageDevice.h>
@@ -62,6 +63,36 @@ namespace Kernel
));
MUST(Processor::scheduler().add_thread(updater_thread));
auto* disk_cache_drop_thread = MUST(Thread::create_kernel(
[](void* _devfs)
{
auto* devfs = static_cast<DevFileSystem*>(_devfs);
while (true)
{
{
SpinLockGuard guard(devfs->m_disk_cache_lock);
bool expected = true;
if (!devfs->m_should_drop_disk_cache.compare_exchange(expected, false))
{
SpinLockGuardAsMutex smutex(guard);
devfs->m_disk_cache_thread_blocker.block_indefinite(&smutex);
continue;
}
}
LockGuard _(devfs->m_device_lock);
size_t pages_dropped = 0;
for (auto& device : devfs->m_devices)
if (device->is_storage_device())
pages_dropped += static_cast<StorageDevice*>(device.ptr())->drop_disk_cache();
dprintln("Dropped {} pages from disk cache", pages_dropped);
}
}, s_instance
));
MUST(Processor::scheduler().add_thread(disk_cache_drop_thread));
auto* disk_sync_thread = MUST(Thread::create_kernel(
[](void* _devfs)
{
@@ -94,6 +125,13 @@ namespace Kernel
MUST(Processor::scheduler().add_thread(disk_sync_thread));
}
void DevFileSystem::initiate_disk_cache_drop()
{
SpinLockGuard _(m_disk_cache_lock);
m_should_drop_disk_cache = true;
m_disk_cache_thread_blocker.unblock();
}
void DevFileSystem::initiate_sync(bool should_block)
{
LockGuard _(m_device_lock);