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Kernel: Do less unnecessary work when tearing down process address space

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When deleting an entire AddressSpace, we don't need to do TLB flushes
at all (since the entire page directory is going away anyway).

We also don't need to deallocate VM ranges one by one, since the entire
VM range allocator will be deleted anyway.
This commit is contained in:
Andreas Kling 2022-01-12 13:48:43 +01:00
parent a702b6ec42
commit 2323cdd914
3 changed files with 7 additions and 3 deletions
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3
Kernel/Memory/AddressSpace.cpp
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@ -320,7 +320,10 @@ void AddressSpace::dump_regions()
void AddressSpace::remove_all_regions(Badge<Process>)
{
VERIFY(Thread::current() == g_finalizer);
SpinlockLocker lock(m_lock);
for (auto& region : m_regions)
(*region).unmap(Region::ShouldDeallocateVirtualRange::No, ShouldFlushTLB::No);
m_regions.clear();
}