range walker

About this tag
The range walker tag on WindowsForum.com covers discussions about the Linux kernel's KSM (Kernel Samepage Merging) scan fix, specifically the range-walk patch that reduces CPU spikes by skipping large unmapped memory holes. This tag is relevant for users interested in Linux memory management, kernel performance, and system optimization. Topics include the scan_get_next_rmap_item function, DoS prevention, and efficiency improvements in virtual address space scanning. While the tag is Linux-focused, it may be of interest to Windows users exploring cross-platform kernel concepts or virtualization scenarios where KSM is used.

  1. Linux Kernel KSM Scan Fix: Range-Walk Patch Cuts DoS CPU Spikes

    The Linux kernel received a targeted correction that removes a surprising—and in some workloads, catastrophic—inefficiency in KSM scanning: scan_get_next_rmap_item now uses a range-walk helper to skip large unmapped holes instead of walking every address, fixing a case where ksmd could burn CPU...
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    • ksm linux kernel memory management range walker
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    • Forum: Security Alerts