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ladybird/Kernel
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Andreas Kling fe6b3f99d1 Kernel: Allocate shared memory regions immediately 
Lazily committed shared memory was not working in situations where one
process would write to the memory and another would only read from it.

Since the reading process would never cause a write fault in the shared
region, we'd never notice that the writing process had added real
physical pages to the VMObject. This happened because the lazily
committed pages were marked "present" in the page table.

This patch solves the issue by always allocating shared memory up front
and not trying to be clever about it.
2021-01-02 16:57:31 +01:00
..
ACPI
Everywhere: Re-format with clang-format-11
2020-12-31 21:51:00 +01:00
API
Everywhere: Re-format with clang-format-11
2020-12-31 21:51:00 +01:00
Arch
Everywhere: Re-format with clang-format-11
2020-12-31 21:51:00 +01:00
Devices
Kernel: Pass "shared" flag to Region constructor
2021-01-02 16:57:31 +01:00
FileSystem
Kernel: Pass "shared" flag to Region constructor
2021-01-02 16:57:31 +01:00
Heap
Kernel: Merge PurgeableVMObject into AnonymousVMObject
2021-01-01 23:43:44 +01:00
Interrupts
Kernel: Merge PurgeableVMObject into AnonymousVMObject
2021-01-01 23:43:44 +01:00
Modules
…
Net
Kernel: Merge PurgeableVMObject into AnonymousVMObject
2021-01-01 23:43:44 +01:00
PCI
Everywhere: Re-format with clang-format-11
2020-12-31 21:51:00 +01:00
Storage
Kernel: Allow to boot from a partition with partition UUID
2021-01-01 22:59:48 +01:00
Syscalls
Kernel: Allocate shared memory regions immediately
2021-01-02 16:57:31 +01:00
Tasks
Kernel: Fix some issues related to fixes and block conditions
2020-12-12 21:28:12 +01:00
Time
Everywhere: Re-format with clang-format-11
2020-12-31 21:51:00 +01:00
TTY
Everywhere: Re-format with clang-format-11
2020-12-31 21:51:00 +01:00
VM
Kernel: Allocate shared memory regions immediately
2021-01-02 16:57:31 +01:00
.gitignore
…
Assertions.h
Everywhere: Switch from (void) to [[maybe_unused]] (#4473)
2020-12-21 00:09:48 +01:00
CMakeLists.txt
Kernel: Enable -fstack-protector-strong (again)
2021-01-02 13:04:30 +01:00
CMOS.cpp
…
CMOS.h
…
CommandLine.cpp
Meta+Kernel: Make clang-format-10 clean
2020-09-25 21:18:17 +02:00
CommandLine.h
…
Console.cpp
Meta+Kernel: Make clang-format-10 clean
2020-09-25 21:18:17 +02:00
Console.h
Kernel: Add a method to determine the desired permissions of a Device
2020-12-27 23:07:44 +01:00
CoreDump.cpp
Kernel: Embed a Metadata notes entry in coredumps
2020-12-30 16:28:27 +01:00
CoreDump.h
Kernel: Embed a Metadata notes entry in coredumps
2020-12-30 16:28:27 +01:00
DoubleBuffer.cpp
Kernel: Merge PurgeableVMObject into AnonymousVMObject
2021-01-01 23:43:44 +01:00
DoubleBuffer.h
Kernel: Move block condition evaluation out of the Scheduler
2020-11-30 13:17:02 +01:00
Forward.h
Kernel: Generate a coredump file when a process crashes
2020-12-14 23:05:53 +01:00
init.cpp
Kernel: Introduce a new partitioning subsystem
2020-12-27 23:07:44 +01:00
IO.h
…
KBuffer.h
Kernel: Allocate profiling memory upfront
2021-01-02 11:36:48 +01:00
KBufferBuilder.cpp
Kernel: Merge PurgeableVMObject into AnonymousVMObject
2021-01-01 23:43:44 +01:00
KBufferBuilder.h
Kernel: Move KBufferBuilder to the fallible KBuffer API
2020-12-18 19:22:26 +01:00
kprintf.cpp
…
KResult.h
Everywhere: Re-format with clang-format-11
2020-12-31 21:51:00 +01:00
kstdio.h
LibC: Enable compiler warnings for printf format strings
2020-12-26 10:05:50 +01:00
KSyms.cpp
Kernel+LibELF: Use hex instead of decimal for stack offsets in back traces (#4728)
2021-01-02 01:38:43 +01:00
KSyms.h
…
linker.ld
…
Lock.cpp
Kernel: Fix Lock race causing infinite spinning between two threads
2020-12-16 23:38:17 +01:00
Lock.h
Kernel: Fix Lock race causing infinite spinning between two threads
2020-12-16 23:38:17 +01:00
LockMode.h
Kernel: Fix Lock race causing infinite spinning between two threads
2020-12-16 23:38:17 +01:00
mkmap.sh
…
Module.h
…
Multiboot.h
…
PerformanceEventBuffer.cpp
Kernel: Use fallible KBuffer API in PerformanceEventBuffer
2020-12-19 10:23:12 +01:00
PerformanceEventBuffer.h
Everywhere: Re-format with clang-format-11
2020-12-31 21:51:00 +01:00
PhysicalAddress.h
Meta+Kernel: Make clang-format-10 clean
2020-09-25 21:18:17 +02:00
Process.cpp
Kernel: Pass "shared" flag to Region constructor
2021-01-02 16:57:31 +01:00
Process.h
Kernel: Pass "shared" flag to Region constructor
2021-01-02 16:57:31 +01:00
ProcessGroup.cpp
Kernel: Move block condition evaluation out of the Scheduler
2020-11-30 13:17:02 +01:00
ProcessGroup.h
Kernel: Move block condition evaluation out of the Scheduler
2020-11-30 13:17:02 +01:00
Profiling.cpp
Kernel: Allocate profiling memory upfront
2021-01-02 11:36:48 +01:00
Profiling.h
…
Ptrace.cpp
Kernel: Release scheduler_lock in ptrace once we know tracee is stopped
2021-01-02 11:52:19 +01:00
Ptrace.h
Meta+Kernel: Make clang-format-10 clean
2020-09-25 21:18:17 +02:00
Random.cpp
Kernel: Fix some issues related to fixes and block conditions
2020-12-12 21:28:12 +01:00
Random.h
Kernel: Tag more methods and types as [[nodiscard]]
2020-12-27 11:09:30 +01:00
RTC.cpp
…
RTC.h
…
Scheduler.cpp
Kernel: Merge PurgeableVMObject into AnonymousVMObject
2021-01-01 23:43:44 +01:00
Scheduler.h
Kernel: Fix some issues related to fixes and block conditions
2020-12-12 21:28:12 +01:00
SharedBuffer.cpp
Kernel: Pass "shared" flag to Region constructor
2021-01-02 16:57:31 +01:00
SharedBuffer.h
Kernel: Merge PurgeableVMObject into AnonymousVMObject
2021-01-01 23:43:44 +01:00
SpinLock.h
Kernel: Tag more methods and types as [[nodiscard]]
2020-12-27 11:09:30 +01:00
StdLib.cpp
Kernel: Make copy_to/from_user safe and remove unnecessary checks
2020-09-13 21:19:15 +02:00
StdLib.h
Kernel: Add checks for is_trivially_copyable to copy_to/from_user
2020-10-02 15:38:07 +02:00
Syscall.cpp
Kernel: Don't allow modifying IOPL via sys$ptrace() or sys$sigreturn()
2020-12-22 19:38:25 +01:00
Thread.cpp
Kernel: Restore thread count if thread cannot be fully created
2021-01-01 23:43:44 +01:00
Thread.h
Kernel: Restore thread count if thread cannot be fully created
2021-01-01 23:43:44 +01:00
ThreadBlockers.cpp
Kernel: Consolidate the various BlockCondition::unblock variants
2020-12-30 13:23:17 +01:00
ThreadTracer.cpp
…
ThreadTracer.h
…
TimerQueue.cpp
Kernel: Improve time keeping and dramatically reduce interrupt load
2020-12-21 18:26:12 +01:00
TimerQueue.h
Kernel: Improve time keeping and dramatically reduce interrupt load
2020-12-21 18:26:12 +01:00
UnixTypes.h
Kernel: Remove MAP_PURGEABLE from mmap
2021-01-01 23:43:44 +01:00
UnveilNode.h
Kernel: Allow 'elevating' unveil permissions if implicitly inherited from '/'
2020-12-26 16:10:04 +01:00
UserOrKernelBuffer.cpp
AK: Add StringBuilder::appendff using the new format.
2020-09-22 15:06:40 +02:00
UserOrKernelBuffer.h
FileSystem: Use OutputMemoryStream instead of BufferStream.
2020-09-15 20:36:45 +02:00
VirtualAddress.cpp
AK+Format: Remove TypeErasedFormatParams& from format function.
2020-12-30 20:33:53 +01:00
VirtualAddress.h
AK+Format: Remove TypeErasedFormatParams& from format function.
2020-12-30 20:33:53 +01:00
WaitQueue.cpp
Everywhere: Fix more typos
2020-12-31 01:47:41 +01:00
WaitQueue.h
Kernel: Fix Lock race causing infinite spinning between two threads
2020-12-16 23:38:17 +01:00