| .\" Copyright (C) 1994, 1995, Daniel Quinlan <quinlan@yggdrasil.com> |
| .\" Copyright (C) 2002-2008, 2017, Michael Kerrisk <mtk.manpages@gmail.com> |
| .\" Copyright (C) 2023, Alejandro Colomar <alx@kernel.org> |
| .\" |
| .\" SPDX-License-Identifier: GPL-3.0-or-later |
| .\" |
| .TH proc_pid_timerslack_ns 5 (date) "Linux man-pages (unreleased)" |
| .SH NAME |
| /proc/pid/timerslack_ns \- timer slack in nanoseconds |
| .SH DESCRIPTION |
| .TP |
| .IR /proc/ pid /timerslack_ns " (since Linux 4.6)" |
| .\" commit da8b44d5a9f8bf26da637b7336508ca534d6b319 |
| .\" commit 5de23d435e88996b1efe0e2cebe242074ce67c9e |
| 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 |
| .B PR_SET_TIMERSLACK |
| in |
| .BR prctl (2). |
| .IP |
| Initially, |
| permission to access this file was governed by a ptrace access mode |
| .B PTRACE_MODE_ATTACH_FSCREDS |
| check (see |
| .BR ptrace (2)). |
| However, this was subsequently deemed too strict a requirement |
| (and had the side effect that requiring a process to have the |
| .B CAP_SYS_PTRACE |
| capability would also allow it to view and change any process's memory). |
| Therefore, since Linux 4.9, |
| .\" commit 7abbaf94049914f074306d960b0f968ffe52e59f |
| only the (weaker) |
| .B CAP_SYS_NICE |
| capability is required to access this file. |
| .SH SEE ALSO |
| .BR proc (5) |
