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From daf02c380515b42db06d9f743070af5ab248a414 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Jaroslav=20=C5=A0karvada?= <jskarvad@redhat.com>
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Date: Fri, 3 Jul 2020 12:17:03 +0200
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Subject: [PATCH] scheduler: fix isolated_cores to work with cgroups
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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It seems cpuset.cpus needs to be initialized before writing to tasks.
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Related: rhbz#1784648
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Signed-off-by: Jaroslav Škarvada <jskarvad@redhat.com>
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---
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tuned/plugins/plugin_scheduler.py | 5 +++++
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1 file changed, 5 insertions(+)
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diff --git a/tuned/plugins/plugin_scheduler.py b/tuned/plugins/plugin_scheduler.py
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index 745ee4a..9ad9f54 100644
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--- a/tuned/plugins/plugin_scheduler.py
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+++ b/tuned/plugins/plugin_scheduler.py
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@@ -106,6 +106,7 @@ class SchedulerPlugin(base.Plugin):
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# calculated by isolated_cores setter
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self._affinity = None
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+ self._cgroup_affinity_initialized = False
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self._cgroup = None
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self._cgroups = collections.OrderedDict([(self._sanitize_cgroup_path(option[7:]), self._variables.expand(affinity))
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for option, affinity in instance.options.items() if option[:7] == "cgroup." and len(option) > 7])
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@@ -478,11 +479,14 @@ class SchedulerPlugin(base.Plugin):
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log.error("Unable to set affinity '%s' for cgroup '%s'" % (affinity, cgroup))
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def _cgroup_set_affinity(self):
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+ if self._cgroup_affinity_initialized:
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+ return
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log.debug("Setting cgroups affinities")
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if self._affinity is not None and self._cgroup is not None and not self._cgroup in self._cgroups:
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self._cgroup_set_affinity_one(self._cgroup, self._affinity, backup = True)
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for cg in self._cgroups.items():
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self._cgroup_set_affinity_one(cg[0], cg[1], backup = True)
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+ self._cgroup_affinity_initialized = True
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def _cgroup_restore_affinity(self):
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log.debug("Restoring cgroups affinities")
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@@ -920,6 +924,7 @@ class SchedulerPlugin(base.Plugin):
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return self._verify_all_irq_affinity(affinity, ignore_missing)
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elif enabling:
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if self._cgroup:
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+ self._cgroup_set_affinity()
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ps_affinity = "cgroup.%s" % self._cgroup
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else:
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ps_affinity = affinity
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--
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2.25.4
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