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| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2015-06-10 19:38:18 -0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2015-06-10 19:43:10 -0300 |
| commit | c7b830b03a976297d28598fb01c82d2e4a1d97de (patch) | |
| tree | b01f8e265b57cc8a620ed12eff12f5d2b86f168b | |
| parent | 2a51b03d73f5a4b78420488e2e426abb24a4a7d9 (diff) | |
| download | python-linux-procfs-c7b830b03a976297d28598fb01c82d2e4a1d97de.tar.gz | |
pidstat: Add PF_NO_SETAFFINITY const
For the stat flag that means that userland is not allowed to meddle with
cpus_allowed, i.e. with the thread's smp affinity, via
sched_setaffinity.
This indeed has the same value as PF_THREAD_BOUND, see the kernel
sources for an explanation, but basically was in this cset:
commit 14a40ffccd6163bbcd1d6f32b28a88ffe6149fc6
Author: Tejun Heo <tj@kernel.org>
Date: Tue Mar 19 13:45:20 2013 -0700
sched: replace PF_THREAD_BOUND with PF_NO_SETAFFINITY
PF_THREAD_BOUND was originally used to mark kernel threads which
were bound to a specific CPU using kthread_bind() and a task with
the flag set allows cpus_allowed modifications only to itself.
Workqueue is currently abusing it to prevent userland from meddling
with cpus_allowed of workqueue workers.
---------------------------------------------------------------
So add the new const but keep the old one, we may have some tool out
there using it.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| -rwxr-xr-x | procfs/procfs.py | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/procfs/procfs.py b/procfs/procfs.py index 0dbf7f5..4ff7e98 100755 --- a/procfs/procfs.py +++ b/procfs/procfs.py @@ -2,7 +2,7 @@ # -*- python -*- # -*- coding: utf-8 -*- # -# Copyright (C) 2007 Red Hat, Inc. +# Copyright (C) 2007-2015 Red Hat, Inc. # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by @@ -54,6 +54,7 @@ class pidstat: PF_SPREAD_PAGE = 0x01000000 PF_SPREAD_SLAB = 0x02000000 PF_THREAD_BOUND = 0x04000000 + PF_NO_SETAFFINITY = 0x04000000 # /* Userland is not allowed to meddle with cpus_allowed */ PF_MEMPOLICY = 0x10000000 PF_MUTEX_TESTER = 0x20000000 PF_FREEZER_SKIP = 0x40000000 |