libctr: Reset the inherited cpu affinity#4041
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nit: you can also add |
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Old kernels do that automatically, but new kernels remember the affinity that was set before the cgroup move due to https://lore.kernel.org/lkml/20220922180041.1768141-1-longman@redhat.com This is undesirable for containers, because they inherit the systemd affinity when the should really move to the container space cpus. see https://issues.redhat.com/browse/OCPBUGS-15102 for more information Co-authored-by: Martin Sivak <msivak@redhat.com> Signed-off-by: Peter Hunt <pehunt@redhat.com>
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@haircommander is this still a draft? |
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AFAIK this relies on the kernel patch which is still not merged: https://lore.kernel.org/lkml/20231003205735.2921964-1-longman@redhat.com/ (@haircommander please correct me if I'm wrong) |
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correct! still a draft for that reason |
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Actually the sched patches were merged in Linux 6.2 (torvalds/linux@bf57ae2) but this PR won't actually work, for the reasons I explain in #4858 (comment). |
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Old kernels do that automatically, but new kernels remember the affinity that was set before the cgroup move due to
https://lore.kernel.org/lkml/20220922180041.1768141-1-longman@redhat.com
This is undesirable for containers, because they inherit the systemd affinity when the should really move to the container space cpus.
Draft as the required patch set is not yet merged upstream