Sinipelto
/
banan-os
forked from Bananymous/banan-os
1
0
Fork 0
Code Pull Requests Activity

Kernel: kmalloc now uses two locks 

One for fixed allocations and one for general allocations
This commit is contained in:
Bananymous 2023-03-06 12:40:35 +02:00
parent e3a71289c0
commit d5f302a68b
1 changed files with 10 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
kernel/kernel/kmalloc.cpp
View File

@ -13,7 +13,8 @@
static constexpr size_t s_kmalloc_min_align = alignof(max_align_t);
static Kernel::SpinLock s_lock;
static Kernel::SpinLock s_general_lock;
static Kernel::SpinLock s_fixed_lock;
struct kmalloc_node
{
@ -191,7 +192,7 @@ void kmalloc_dump_info()
static void* kmalloc_fixed()
{
Kernel::LockGuard guard(s_lock);
Kernel::LockGuard guard(s_fixed_lock);
auto& info = s_kmalloc_fixed_info;
@ -232,7 +233,7 @@ static void* kmalloc_fixed()
static void* kmalloc_impl(size_t size, size_t align)
{
Kernel::LockGuard guard(s_lock);
Kernel::LockGuard guard(s_general_lock);
ASSERT(align % s_kmalloc_min_align == 0);
@ -298,7 +299,7 @@ void* kmalloc(size_t size)
return res;
}
static bool is_power_of_two(size_t value)
static constexpr bool is_power_of_two(size_t value)
{
if (value == 0)
return false;
@ -307,7 +308,7 @@ static bool is_power_of_two(size_t value)
void* kmalloc(size_t size, size_t align)
{
kmalloc_info& info = s_kmalloc_info;
const kmalloc_info& info = s_kmalloc_info;
if (size == 0 || size >= info.size)
return nullptr;
@ -325,8 +326,6 @@ void* kmalloc(size_t size, size_t align)
void kfree(void* address)
{
Kernel::LockGuard guard(s_lock);
if (address == nullptr)
return;
@ -335,6 +334,8 @@ void kfree(void* address)
if (s_kmalloc_fixed_info.base <= address_uint && address_uint < s_kmalloc_fixed_info.end)
{
Kernel::LockGuard guard(s_fixed_lock);
auto& info = s_kmalloc_fixed_info;
ASSERT(info.used_list_head);
@ -366,6 +367,8 @@ void kfree(void* address)
}
else if (s_kmalloc_info.base <= address_uint && address_uint < s_kmalloc_info.end)
{
Kernel::LockGuard guard(s_general_lock);
auto& info = s_kmalloc_info;
auto* node = info.from_address(address);