RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-05-24 01:05:08 +00:00
Code Issues Activity Actions

Kernel: Use KString for Region names

Browse source 
Replace the AK::String used for Region::m_name with a KString.

This seems beneficial across the board, but as a specific data point,
it reduces time spent in sys$set_mmap_name() by ~50% on test-js. :^)
This commit is contained in:
Andreas Kling 2021-05-28 09:33:14 +02:00
parent a1944ec966
commit fc9ce22981
10 changed files with 64 additions and 62 deletions
Download patch file Download diff file Expand all files Collapse all files

10
Kernel/VM/Space.cpp
View file

@ -47,7 +47,7 @@ Optional<Range> Space::allocate_range(VirtualAddress vaddr, size_t size, size_t
Region& Space::allocate_split_region(const Region& source_region, const Range& range, size_t offset_in_vmobject)
{
auto& region = add_region(Region::create_user_accessible(
m_process, range, source_region.vmobject(), offset_in_vmobject, source_region.name(), source_region.access(), source_region.is_cacheable() ? Region::Cacheable::Yes : Region::Cacheable::No, source_region.is_shared()));
m_process, range, source_region.vmobject(), offset_in_vmobject, KString::try_create(source_region.name()), source_region.access(), source_region.is_cacheable() ? Region::Cacheable::Yes : Region::Cacheable::No, source_region.is_shared()));
region.set_syscall_region(source_region.is_syscall_region());
region.set_mmap(source_region.is_mmap());
region.set_stack(source_region.is_stack());
@ -59,19 +59,19 @@ Region& Space::allocate_split_region(const Region& source_region, const Range& r
return region;
}
KResultOr<Region*> Space::allocate_region(const Range& range, const String& name, int prot, AllocationStrategy strategy)
KResultOr<Region*> Space::allocate_region(Range const& range, StringView name, int prot, AllocationStrategy strategy)
{
VERIFY(range.is_valid());
auto vmobject = AnonymousVMObject::create_with_size(range.size(), strategy);
if (!vmobject)
return ENOMEM;
auto region = Region::create_user_accessible(m_process, range, vmobject.release_nonnull(), 0, name, prot_to_region_access_flags(prot), Region::Cacheable::Yes, false);
auto region = Region::create_user_accessible(m_process, range, vmobject.release_nonnull(), 0, KString::try_create(name), prot_to_region_access_flags(prot), Region::Cacheable::Yes, false);
if (!region->map(page_directory()))
return ENOMEM;
return &add_region(move(region));
}
KResultOr<Region*> Space::allocate_region_with_vmobject(const Range& range, NonnullRefPtr<VMObject> vmobject, size_t offset_in_vmobject, const String& name, int prot, bool shared)
KResultOr<Region*> Space::allocate_region_with_vmobject(Range const& range, NonnullRefPtr<VMObject> vmobject, size_t offset_in_vmobject, StringView name, int prot, bool shared)
{
VERIFY(range.is_valid());
size_t end_in_vmobject = offset_in_vmobject + range.size();
@ -88,7 +88,7 @@ KResultOr<Region*> Space::allocate_region_with_vmobject(const Range& range, Nonn
return EINVAL;
}
offset_in_vmobject &= PAGE_MASK;
auto& region = add_region(Region::create_user_accessible(m_process, range, move(vmobject), offset_in_vmobject, name, prot_to_region_access_flags(prot), Region::Cacheable::Yes, shared));
auto& region = add_region(Region::create_user_accessible(m_process, range, move(vmobject), offset_in_vmobject, KString::try_create(name), prot_to_region_access_flags(prot), Region::Cacheable::Yes, shared));
if (!region.map(page_directory())) {
// FIXME: What is an appropriate error code here, really?
return ENOMEM;