Update perf_event_paranoid help message to include setcap method

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Assessment

Difficulty
1/5
Estimated time
1-3 hours
Newbie friendliness
55/100
Issue type
Documentation
Clarity
Mostly clear
Activity status
Stale
Tech stack
cpp, linux
Domain
documentation, operating-systems

Research direction

Locate the rr error or help message that discusses perf_event_paranoid and read its surrounding code. Update the message to mention the setcap command from the issue, then verify that the resulting guidance includes this alternative without changing the existing option.

Written by the indexing model from the issue text.

Description

Executing sudo setcap "cap_sys_ptrace,cap_perfmon=ep" $(which rr) (from this comment) allows rr run in fast mode without changing perf_event_paranoid. Changing the capabilities for a single binary (or a for a single user?) seems more secure than changing perf_event_paranoid for the whole system. IMO the error message rr prints out about perf_event_paranoid should be updated to include this option.

Dominant language
C++
Stars
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Forks
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Avg merge
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Merged PRs (30d)
2

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  4. Open a pull request that references the issue number.

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