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3 commits

Author SHA1 Message Date
Andreas Kling
9e55bcb7da Kernel: Make kernel memory regions be non-executable by default 
From now on, you'll have to request executable memory specifically
if you want some.
 2019-12-25 22:41:34 +01:00
Andreas Kling
078ee798f7 Kernel: Bump KBufferBuilder VM allocation to 4 MB 
This is pretty large but since it's not eagerly committed to physical
pages, it's probably okay. I'm bumping this after running out of space
for a ProtocolServer profile run :^)
 2019-12-12 21:58:32 +01:00
Andreas Kling
f083031a27 Kernel: Add KBufferBuilder, similar to StringBuilder but for KBuffer 
This class works by eagerly allocating 1MB of virtual memory but only
adding physical pages on demand. In other words, when you append to it,
its memory usage will increase by 1 page whenever you append across a
page boundary (4KB.)
 2019-08-06 20:04:12 +02:00