From 32c915a65226e03903d383effe3b2ed19c343198 Mon Sep 17 00:00:00 2001 From: thomasabishop Date: Tue, 16 Jul 2024 07:00:04 +0100 Subject: [PATCH] Autosave: 2024-07-16 07:00:04 --- .zk/notebook.db | Bin 4153344 -> 4153344 bytes zk/VirtualMemory.md | 20 ++++++++++++-------- 2 files changed, 12 insertions(+), 8 deletions(-) diff --git a/.zk/notebook.db b/.zk/notebook.db index 0a7da94b60ab37baf1c558df98866a4666f152aa..348c3daaa0a70358c8ddc33ab052fb4ec7363f6d 100644 GIT binary patch delta 3803 zcmcgvdu&_P8Nc7T_xjq`*N?<`G*05Uc{tA|*Y8IPDQQEJHV+qQMb|>>*w@4~iGyR> zF+^(z$1V+8(?!bZ7!s{i)WIZRRP-`5O&LrYXw$|Y6KK;km=Mzb*jBLzdjMjeDG`>!*8k?)kp+o%8*E=X^J_`UzwZOSOip48wj{0`uD0Ha}eb?h&Q0_Oawt7033F znPgg-I~+|;O)1fIA~`cBJbU@wzD_&*@UnCyY=WWXdy?%ie7TT(#0(EF^O>uX=B(fp zT7`O{SM&CZ*)x0@e~w|8Z$6p9A7E?8x#jcuU9f%m{d~a2Ffj7^`WvXccx}v+=hs@7 zdkb%9i*A>GC#;I!6JHd+v;6xd>t*BFNgV{1k3Zq5(QqJvj;uYjrH8Qgxcs9h`v0nV zg)#lf^olAi!E>e-pU5&PjDX?wr|)O91b_wL0C)fmfB>Kc&=uZ!3J^qn=P9-&tO23G 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zroUic-udCBrr|3U`}?8ri{$%FJIVK(|0MtJ4~7)CSv_uYzKPFizF@m=xvU;1o};R= z?Re|n*N&=9l51GiSJQ>Ni+Ow(7I|xZ=aQw#{o&H)xAHriwkEIC_zJC2cxz2JNm664 zRe$EFyys~8Y6Sz`iJJba)Lv(3Y`wKgL~%hR;cK$?%BS8-HdQ9|rZ)w7_(SByw{k=t z?G`*g_m75tR{5hBW4Ewj@s`=t%0{lxK3#ks%r z8ulhM-tV%?dq2|DqYIha-=1yV`Sxt`N{rlVt?m5Hog_XO%)h&e()CLBYH}~T_hMx=iPVPFj?{tFiIhU>Lh459LFz^7L+VEw zKpI3ELK;RIK^omzSsnX=_ucpUb{~?zJ@!Ii%sT#|6?WeLODBy zvtTq4u diff --git a/zk/VirtualMemory.md b/zk/VirtualMemory.md index 2c33809..e66f2f5 100644 --- a/zk/VirtualMemory.md +++ b/zk/VirtualMemory.md @@ -12,7 +12,7 @@ memory capacity of a machine that is presented to user space for its memory operations. When an OS implements virtual memory, [processes](./Processes.md) in -[user space](./User_Space.md) cannot directly read or write to the actual +[user space](./User_Space.md) cannot directly read or write to the physical memory. Instead they execute memory operations against virtual memory and the [kernel](./The_kernel.md) translates these into the actual operations against the memory hardware. @@ -43,15 +43,19 @@ machine: _How Computers Really Work_ (2021) p.206 -Furthermore the kernel itself utilises virtual memory. The difference with -kernel virtual memory is that it has a different range of virtual addresses to -work with than user space virtual memory. +## Virtual memory and the kernel -Also, unlike user address space, the kernel has access to everything running in -kernel address space. Processes in user address space are partitioned from each -other with separate address spaces that cannot interact. +The kernel itself utilises virtual memory. The kernel virtual memory has a +different range of virtual addresses to work with than user space virtual +memory. + +Unlike user space virtual memory, the kernel has access to everything running in +kernel address space whereas processes in user address space are partitioned +from each other with separate address spaces that cannot interact. // Next: the kernel also uses virtual memory however isn't also responsible for the appportioning of virtual memory. Confused. -// See Claude convo ![Virtual memory diagram](/img/virtual-memory-diagram.jpg) +// See Claude convo + +![Virtual memory diagram](/img/virtual-memory-diagram.jpg)