Crash Memory Reservation via Driver Usage Estimation
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Solution Overview
Problem
Conventional methods for reserving memory space for a crash kernel in computing systems often result in either wasteful over-estimation or insufficient memory allocation, leading to inefficient use of resources and potential failure in capturing crash data due to manual estimation based on common configurations.
Innovation Solution
A method and system for automatically estimating and reserving crash memory space for a second kernel based on the actual memory usage of device drivers in the first operational kernel, using a crash memory estimation subsystem that collects and analyzes memory usage data to generate an accurate estimate and configure the reserved memory space accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual estimation of memory space for crash kernel is used, then ease of operation is improved, but memory allocation precision deteriorates leading to either over-estimation waste or insufficient allocation
Solution Approach 1:
The system automatically determines the memory space requirements for the crash kernel by monitoring actual device driver memory usage in the operational kernel. The crash memory estimation subsystem self-calculates the required reserved memory based on real memory consumption data, eliminating the need for manual estimation while achieving precise allocation.
Solution Approach 2:
The system continuously monitors actual device driver memory usage and uses this feedback to dynamically adjust and refine the estimation of required crash kernel memory space. This feedback loop enables the system to adapt to changing memory consumption patterns and achieve accurate memory reservation.
2Ease of operation
If default memory size (e.g., 128 MB) is used for crash kernel, then ease of operation is improved, but memory allocation precision deteriorates causing wasteful over-estimation on memory-constrained systems
Solution Approach 1:
Instead of using a fixed default memory size, the system dynamically changes the memory allocation parameter based on actual device driver memory usage measurements. The reserved memory space is adjusted according to the real consumption patterns observed in the operational kernel, optimizing memory utilization for each specific system configuration.
Solution Approach 2:
The memory reservation system transitions from a static default value to a dynamic calculation that adapts to actual system conditions. The crash memory estimation subsystem continuously updates the required memory space based on current device driver memory consumption, enabling flexible and efficient memory allocation.
3Adaptability or versatility
If user estimates memory size manually, then adaptability to different systems is improved, but reliability of crash data capture deteriorates when estimation is too small
Solution Approach 1:
The system replaces the manual mechanical estimation process with an automated computational approach. The crash memory estimation subsystem uses software-based monitoring and calculation to determine the exact memory requirements, eliminating human error and ensuring reliable crash data capture while maintaining adaptability to different system configurations.
Solution Approach 2:
The system creates a virtual copy or representation of the operational kernel's memory usage patterns to analyze and determine the required crash kernel memory space. By monitoring and replicating the memory consumption behavior of device drivers, the system can accurately predict the needed allocation without manual intervention.
Data Source
AI summary
A computing system stores actual memory usage data in a user memory space. The actual memory usage data represents memory usage of a plurality of device drivers that are loaded by a first kernel. The computing system generates an estimate of memory space to be reserved for a second kernel based on the actual memory usage data for the plurality of device drivers that are loaded by the first kernel and reserves memory space for the second kernel using the estimate.