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 MElgSgXu 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Yet to find perf diff on > will-it-scale, so not included here. Plan to run more workloads. > 2. add tracepoint. > 3. To peterz's comment, this will make it impossible to attract tasks to > those memory just like other VMA skippings. This is the current > implementation, I think we can improve that in the future, but at the > moment it's probabaly better to keep it consistent. > > v2->v3: > 1. add enable_cpuset() based on Mel's suggestion but again I think it's > redundant. > 2. print out nodemask with %*p.. format in the tracepoint. > > v3->v4: > 1. fix an unsafe dereference of a pointer to content not on ring buffer, > namely mem_allowed_ptr in the tracepoint. > > v4->v5: > 1. add BUILD_BUG_ON() in TP_fast_assign() to guard against future > changes (particularly in size) in nodemask_t. > > Libo Chen (2): > sched/numa: Skip VMA scanning on memory pinned to one NUMA node via > cpuset.mems > sched/numa: Add tracepoint that tracks the skipping of numa balancing > due to cpuset memory pinning > > include/trace/events/sched.h | 33 +++++++++++++++++++++++++++++++++ > kernel/sched/fair.c | 9 +++++++++ > 2 files changed, 42 insertions(+) > Tested on top of next-20250424. The boot warning[1] is fixed with this version. Tested-by: Srikanth Aithal [1]: https://lore.kernel.org/all/20250422205740.02c4893a@canb.auug.org.au/