serenity - The Serenity Operating System 🐞

Age	Commit message (Collapse)	Author
2020-02-21	Kernel: Expose the underlying Region of a KBuffer	Andreas Kling

2020-02-16	Kernel: Add forward declaration header	Andreas Kling

2020-02-16	Kernel: Move all code into the Kernel namespace	Andreas Kling

2020-01-20	Kernel: Allow naming KBuffers	Andreas Kling

2020-01-18	Meta: Add license header to source files	Andreas Kling
	As suggested by Joshua, this commit adds the 2-clause BSD license as a comment block to the top of every source file. For the first pass, I've just added myself for simplicity. I encourage everyone to add themselves as copyright holders of any file they've added or modified in some significant way. If I've added myself in error somewhere, feel free to replace it with the appropriate copyright holder instead. Going forward, all new source files should include a license header.
2019-12-25	Kernel: Make kernel memory regions be non-executable by default	Andreas Kling
	From now on, you'll have to request executable memory specifically if you want some.
2019-09-27	Kernel: Make Region single-owner instead of ref-counted	Andreas Kling
	This simplifies the ownership model and makes Region easier to reason about. Userspace Regions are now primarily kept by Process::m_regions. Kernel Regions are kept in various OwnPtr<Regions>'s. Regions now only ever get unmapped when they are destroyed.
2019-08-24	KBuffer: capacity() should return internal capacity, not internal size	Andreas Kling
	KBuffer is just meant to be a dumb wrapper around KBufferImpl. With this change, we actually start to see KBuffers with different size and capacity, which allows some reallocation-avoiding optimizations.
2019-08-06	Kernel: Make KBuffer lazily populated	Andreas Kling
	KBuffers are now zero-filled on demand instead of up front. This means that you can create a huge KBuffer and it will only take up VM, not physical pages (until you access them.)
2019-08-06	KBuffer: Add set_size() and LogStream operator<<	Andreas Kling
	It will be useful to be able to set the "public" size of a KBuffer. It can still have a different amount of memory allocated internally.
2019-08-05	Kernel: Use KBuffers for ProcFS and SynthFS	Andreas Kling
	Instead of generating ByteBuffers and keeping those lying around, have these filesystems generate KBuffers instead. These are way less spooky to leave around for a while. Since FileDescription will keep a generated file buffer around until userspace has read the whole thing, this prevents trivially exhausting the kmalloc heap by opening many files in /proc for example. The code responsible for generating each /proc file is not perfectly efficient and many of them still use ByteBuffers internally but they at least go away when we return now. :^)
2019-08-05	Kernel: Add a little comment header about KBuffer	Andreas Kling

2019-08-05	Kernel: Make KBuffer a value-type wrapper around a KBufferImpl	Andreas Kling
	A KBuffer always contains a valid KBufferImpl. If you need a "null" state buffer, use Optional<KBuffer>. This makes KBuffer very easy to work with and pass around, just like ByteBuffer before it.
2019-08-04	Kernel: Add KBuffer, a simple byte buffer backed by kernel-only memory	Andreas Kling
	This memory is not accessible to userspace and comes from the kernel page allocator, not from the kmalloc heap. This makes it ideal for larger allocations.