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Kernel: Make sys$anon_create() allocate physical pages immediately

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This fixes an issue where a sharing process would map the "lazy
committed page" early and then get stuck with that page even after
it had been replaced in the VMObject by a page fault.

Regressed in 27c1135d30, which made it
happen every time with the backing bitmaps used for WebContent.
This commit is contained in:
Andreas Kling 2022-08-18 20:59:04 +02:00
parent 81ee870c9b
commit e1476788ad
1 changed files with 1 additions and 1 deletions
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2
Kernel/Syscalls/anon_create.cpp
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@ -26,7 +26,7 @@ ErrorOr<FlatPtr> Process::sys$anon_create(size_t size, int options)
return EINVAL;
auto new_fd = TRY(allocate_fd());
auto vmobject = TRY(Memory::AnonymousVMObject::try_create_purgeable_with_size(size, AllocationStrategy::Reserve));
auto vmobject = TRY(Memory::AnonymousVMObject::try_create_purgeable_with_size(size, AllocationStrategy::AllocateNow));
auto anon_file = TRY(AnonymousFile::try_create(move(vmobject)));
auto description = TRY(OpenFileDescription::try_create(move(anon_file)));