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Kernel: Use per cpu fast page for {Memory,File}BackedRegion

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Bananymous
2026-05-20 02:51:48 +03:00
parent 46a1903f8d
commit 32206069bc
2 changed files with 21 additions and 21 deletions
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kernel/kernel/Memory/FileBackedRegion.cpp
+12 -12
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@@ -97,8 +97,8 @@ namespace Kernel
return;
uint8_t page_buffer[PAGE_SIZE];
PageTable::with_fast_page(pages[page_index], [&] {
memcpy(page_buffer, PageTable::fast_page_as_ptr(), PAGE_SIZE);
PageTable::with_per_cpu_fast_page(pages[page_index], [&](void* addr) {
memcpy(page_buffer, addr, PAGE_SIZE);
});
const size_t write_size = BAN::Math::min<size_t>(PAGE_SIZE, inode->size() - page_index * PAGE_SIZE);
@@ -162,8 +162,8 @@ namespace Kernel
m_shared_data->pages[shared_page_index] = Heap::get().take_free_page();
if (m_shared_data->pages[shared_page_index] == 0)
return BAN::Error::from_errno(ENOMEM);
PageTable::with_fast_page(m_shared_data->pages[shared_page_index], [&] {
memcpy(PageTable::fast_page_as_ptr(), page_buffer, PAGE_SIZE);
PageTable::with_per_cpu_fast_page(m_shared_data->pages[shared_page_index], [&](void* addr) {
memcpy(addr, page_buffer, PAGE_SIZE);
});
shared_data_has_correct_page = true;
}
@@ -181,12 +181,12 @@ namespace Kernel
return BAN::Error::from_errno(ENOMEM);
if (!shared_data_has_correct_page)
{
PageTable::with_fast_page(m_shared_data->pages[shared_page_index], [&] {
memcpy(page_buffer, PageTable::fast_page_as_ptr(), PAGE_SIZE);
PageTable::with_per_cpu_fast_page(m_shared_data->pages[shared_page_index], [&](void* addr) {
memcpy(page_buffer, addr, PAGE_SIZE);
});
}
PageTable::with_fast_page(paddr, [&] {
memcpy(PageTable::fast_page_as_ptr(), page_buffer, PAGE_SIZE);
PageTable::with_per_cpu_fast_page(paddr, [&](void* addr) {
memcpy(addr, page_buffer, PAGE_SIZE);
});
m_dirty_pages[local_page_index] = paddr;
m_page_table.map_page_at(paddr, vaddr, m_flags);
@@ -210,8 +210,8 @@ namespace Kernel
return BAN::Error::from_errno(ENOMEM);
ASSERT(&m_page_table == &PageTable::current());
PageTable::with_fast_page(paddr, [vaddr] {
memcpy(PageTable::fast_page_as_ptr(), reinterpret_cast<void*>(vaddr), PAGE_SIZE);
PageTable::with_per_cpu_fast_page(paddr, [vaddr](void* addr) {
memcpy(addr, reinterpret_cast<void*>(vaddr), PAGE_SIZE);
});
m_dirty_pages[local_page_index] = paddr;
@@ -240,8 +240,8 @@ namespace Kernel
return BAN::Error::from_errno(ENOMEM);
ASSERT(&m_page_table == &PageTable::current() || &m_page_table == &PageTable::kernel());
PageTable::with_fast_page(paddr, [&] {
memcpy(PageTable::fast_page_as_ptr(), reinterpret_cast<void*>(vaddr), PAGE_SIZE);
PageTable::with_per_cpu_fast_page(paddr, [&](void* addr) {
memcpy(addr, reinterpret_cast<void*>(vaddr), PAGE_SIZE);
});
result->m_page_table.map_page_at(paddr, vaddr, m_flags);