Linux Timer Slack: Find the Per-Thread Coalescing Policy Behind a Late Wait
Why can a worker inherit a different timeout-coalescing allowance, and why does setting PR_SET_TIMERSLACK to zero not disable that allowance?
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openat2 for Embedded File Imports: Keep Path Resolution Inside the Chosen Directory
Why does checking a path string or using O_NOFOLLOW only on its final component fail to define the full directory-resolution policy of an imported configuration?
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V4L2 Media Pipelines: Diagnose STREAMON EPIPE Before Reallocating Capture Buffers
Why can a capture node accept its format and buffers but STREAMON still reject the pipeline because connected sub-device pads disagree?
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systemd Automount for Service Media: Separate Boot Success from First-Access Readiness
Why can a device boot successfully with a nofail removable-media entry yet its application wait or fail when it first opens the automount path?
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systemd-tmpfiles Cleanup: Why an Old Spool File Can Survive Its Age Limit
Why can a temporary acquisition file remain after its modification time is older than the configured cleanup age?
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systemd Timers on Intermittently Powered Devices: A Catch-Up Trigger Is Not a Backlog
After an embedded device was off for several scheduled runs, why does Persistent=yes produce a catch-up activation rather than one invocation per missed interval?
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systemd Service Shutdown: Wait for Workers Before ExecStop Returns
Why does a daemon lose unfinished worker cleanup when its ExecStop helper only sends a shutdown request and immediately exits?
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V4L2 Requests: Bind Per-Frame Controls Without Reusing an In-Flight Request
When a codec or camera uses the Request API, when do staged controls become associated with buffers and when may the request object be reset for reuse?
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Linux memfd Seals: Freeze a Shared Configuration Before Passing It to a Worker
Why does a read-only receiver mapping fail to guarantee immutable configuration while another process retains a writable shared mapping?
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Linux Serial Read Timeouts: VTIME Does Not Always Bound the First Byte
Why can a noncanonical serial read wait indefinitely with both VMIN and VTIME nonzero, even though the application configured a timeout?
