NAME¶
/proc/pid/timerslack_ns - timer slack in nanoseconds
DESCRIPTION¶
- /proc/pid/timerslack_ns (since Linux 4.6)
- This file exposes the process's "current" timer slack value,
expressed in nanoseconds. The file is writable, allowing the process's
timer slack value to be changed. Writing 0 to this file resets the
"current" timer slack to the "default" timer slack
value. For further details, see the discussion of PR_SET_TIMERSLACK
in prctl(2).
- Initially, permission to access this file was governed by a ptrace access
mode PTRACE_MODE_ATTACH_FSCREDS check (see ptrace(2)).
However, this was subsequently deemed too strict a requirement (and had
the side effect that requiring a process to have the CAP_SYS_PTRACE
capability would also allow it to view and change any process's memory).
Therefore, since Linux 4.9, only the (weaker) CAP_SYS_NICE
capability is required to access this file.
