Background mostly done?

tex/misc/background_draft.bib

@@ -594,4 +594,30 @@
   publisher={LWN.net},
   author={Corbet, Jonathan},
   year={2021}
-}
+}
+
+@misc{Parris.AMBA_4_ACE-Lite.2013,
+  title={Extended system coherency: Cache Coherency Fundamentals},
+  url={https://community.arm.com/arm-community-blogs/b/architectures-and-processors-blog/posts/extended-system-coherency---part-1---cache-coherency-fundamentals},
+  journal={Extended System Coherency: Cache Coherency Fundamentals - Architectures and Processors blog - Arm Community blogs - Arm Community},
+  publisher={ARM Community Blogs},
+  author={Parris, Neil},
+  year={2013}
+}
+
+@misc{Miller_Henderson_Jelinek.Kernelv6.7-DMA_guide.2024,
+  title={Dynamic DMA mapping Guide},
+  url={https://www.kernel.org/doc/html/v6.7/core-api/dma-api-howto.html},
+  journal={The Linux Kernel},
+  author={Miller, David S and Henderson, Richard and Jelinek, Jakub},
+  year={2024}
+}
+
+@misc{many.MSFTLearn-SMBDirect.2024,
+  title={SMB Direct},
+  url={https://learn.microsoft.com/en-us/windows-server/storage/file-server/smb-direct},
+  journal={Microsoft Learn},
+  publisher={Microsoft},
+  author={Xelu86 and ManikaDhiman and dknappettmsft and v-alje and nedpyle and eross-msft and SubodhBhargava and JasonGerend and lizap and Heidilohr},
+  year={2024}
+}