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Revert "Kernel: Allocate shared memory regions immediately"

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This reverts commit fe6b3f99d1.
This commit is contained in:
Tom 2021-01-02 10:16:39 -07:00 • committed by Andreas Kling
parent 4bc33ee3ae
commit e3190bd144
Notes: sideshowbarker 2024-07-19 00:11:49 +09:00
3 changed files with 2 additions and 8 deletions
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2
Kernel/Syscalls/mmap.cpp
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@ -141,7 +141,7 @@ void* Process::sys$mmap(Userspace<const Syscall::SC_mmap_params*> user_params)
}
if (map_anonymous) {
auto strategy = map_shared ? AllocationStrategy::AllocateNow : (map_noreserve ? AllocationStrategy::None : AllocationStrategy::Reserve);
auto strategy = map_noreserve ? AllocationStrategy::None : AllocationStrategy::Reserve;
region = allocate_region(range.value(), !name.is_null() ? name : "mmap", prot, strategy);
if (!region && (!map_fixed && addr != 0))
region = allocate_region(allocate_range({}, size), !name.is_null() ? name : "mmap", prot, strategy);

2
Kernel/Syscalls/shbuf.cpp
View file

@ -52,7 +52,7 @@ int Process::sys$shbuf_create(int size, void** buffer)
return -EINVAL;
size = PAGE_ROUND_UP(size);
auto vmobject = AnonymousVMObject::create_with_size(size, AllocationStrategy::AllocateNow);
auto vmobject = AnonymousVMObject::create_with_size(size, AllocationStrategy::Reserve);
if (!vmobject)
return -ENOMEM;

6
Kernel/VM/Region.cpp
View file

@ -282,12 +282,6 @@ bool Region::map_individual_page_impl(size_t page_index)
if (!page || (!is_readable() && !is_writable())) {
pte->clear();
} else {
if (is_shared()) {
// Shared memory should not be lazily populated!
ASSERT(!page->is_shared_zero_page());
ASSERT(!page->is_lazy_committed_page());
}
pte->set_cache_disabled(!m_cacheable);
pte->set_physical_page_base(page->paddr().get());
pte->set_present(true);