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| author | Valentin Schneider <valentin.schneider@arm.com> | 2021-08-18 13:13:33 +0530 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2021-08-20 12:32:57 +0200 |
| commit | 0083242c93759dde353a963a90cb351c5c283379 (patch) | |
| tree | 04bca15e37cee34811bc8b7e871cc2dbf083f223 /tools/perf/scripts/python/export-to-sqlite.py | |
| parent | 746f5ea9c4283d98353c1cd41864aec475e0edbd (diff) | |
sched/topology: Skip updating masks for non-online nodes
The scheduler currently expects NUMA node distances to be stable from
init onwards, and as a consequence builds the related data structures
once-and-for-all at init (see sched_init_numa()).
Unfortunately, on some architectures node distance is unreliable for
offline nodes and may very well change upon onlining.
Skip over offline nodes during sched_init_numa(). Track nodes that have
been onlined at least once, and trigger a build of a node's NUMA masks
when it is first onlined post-init.
Reported-by: Geetika Moolchandani <Geetika.Moolchandani1@ibm.com>
Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Signed-off-by: Valentin Schneider <valentin.schneider@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20210818074333.48645-1-srikar@linux.vnet.ibm.com
Diffstat (limited to 'tools/perf/scripts/python/export-to-sqlite.py')
0 files changed, 0 insertions, 0 deletions