Windows Vista and “Longhorn” Server Under the Hoo…….ppt

Windows Vista and “Longhorn” Server: Under the Hood of the Operating System Internals and Your Application Richard B. Ward Karthik Thirumalai FUN417 Program Manager Architect karthikt@ richardw@ Simplified Windows Core Simplified Windows Core Core Changes New Boot environment Platform and Firmware independent and highly portable Supports 32 and 64 bit systems via PC/AT BIOS or EFI Fully localized, supporting many languages Hot Add/Replace of processor and memory Enhanced power management with Hybrid Sleep Combines Standby and Hibernate Suspend to RAM and disk at the same time Core Changes Memory manager Dynamic system address space System virtual address (VA) space kernel page tables allocated on-demand NUMA and large page support Paging video memory Core Changes User Mode Driver Framework Infrastructure to run a device driver in user-mode Implementation of the WDF Driver Model Supports core WDF objects User-Mode Drivers are isolated from other drivers Kernel is isolated from User-Mode drivers System can recover after a driver crash – no blue screen Enhanced multimedia support Multimedia Class Scheduler Service Support for soft real-time memory allocations Scheduled File I/O Security Enhancements Kernel mode malware on the rise Presents new categories of problems Malicious code running with the highest privileges Device drivers can monitor and affect almost anything on the system Security Enhancements Kernel mode code must be digitally signed Enforced at install and load time x64 only for Vista User mode code Critical system processes will require signed code Windows Services Architecture overview Changes to the services model Security Session 0 isolation, Service hardening Performance Delayed Start, State change notifications Reliability Failure action on non-crash failures Services Model Overview Service Start Types Automatic Started during boot by SCM Auto-start services have a significant performance effect Lots of I/O requests and contentio