Messages in this thread | | | Date | Tue, 29 Nov 2022 13:01:47 +0100 | Subject | [PATCH v2 0/2] x86/resctrl: Implement rename to help move containers' tasks | From | Peter Newman <> |
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Hi Reinette, Fenghua,
This patch series implements the solution Reinette suggested in the earlier RFD thread[1] for the problem of moving a container's tasks to a different control group on systems that don't provide enough CLOSIDs to give every container its own control group.
This change originally depended on the CLOSID update race fix[2] to provide a race-free mechanism for notifying the CPUs where moved tasks were residing. However, now that the current guidance for group task movement is to broadcast IPIs to all CPUs, this patch can be applied independently.
This patch series assumes that a MON group's CLOSID can simply be changed to that of a new parent CTRL_MON group. This is allowed on Intel and AMD, but not MPAM implementations. While we (Google) only foresee needing this functionality on Intel and AMD systems, this series should hopefully be a good starting point for supporting MPAM.
Thanks! -Peter
Updates:
v2: reworded change logs based on what I've learned from review comments in another patch series[3]
[v1] https://lore.kernel.org/lkml/20221115154515.952783-1-peternewman@google.com/
[1] https://lore.kernel.org/lkml/7b09fb62-e61a-65b9-a71e-ab725f527ded@intel.com/ [2] https://lore.kernel.org/lkml/20221103141641.3055981-2-peternewman@google.com/ [3] https://lore.kernel.org/lkml/54e50a9b-268f-2020-f54c-d38312489e2f@intel.com/
Peter Newman (2): x86/resctrl: Factor rdtgroup lock for multi-file ops x86/resctrl: Implement rename op for mon groups
arch/x86/kernel/cpu/resctrl/rdtgroup.c | 101 +++++++++++++++++++++---- 1 file changed, 88 insertions(+), 13 deletions(-)
base-commit: b7b275e60bcd5f89771e865a8239325f86d9927d -- 2.38.1.584.g0f3c55d4c2-goog
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