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Explore a conference talk presenting an innovative bootloader-based approach to implementing Suspend to Disk (S2D) functionality on mobile devices. Learn about the challenges of traditional Linux kernel S2D mechanisms in mobile environments, including storage driver loading delays and page-by-page restoration limitations that impact boot performance. Discover how moving the restoration process from the kernel to the bootloader level can overcome these constraints by enabling block-based image loading instead of page-by-page restoration. Understand the practical applications of this technology, such as preserving user state during low battery conditions and facilitating quick system switching in multi-OS mobile devices. Examine the technical implementation details of how the Linux kernel handles system suspension and image storage, while the bootloader takes responsibility for image restoration during cold reboots. Gain insights into optimizing system boot KPI performance and addressing real-world deployment challenges in mobile S2D implementations.
