diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2025-10-27 09:44:45 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2025-11-04 08:32:14 +0100 |
| commit | 4b7de6df20d43dd651031aef8d818fa5da981dbf (patch) | |
| tree | b4a5bc7da9f59d105c1be32f36c0d63e6054c2f5 /include/trace | |
| parent | 4fc9225d19ad6289c03340a520d35e3a6d1aebed (diff) | |
rseq: Cache CPU ID and MM CID values
In preparation for rewriting RSEQ exit to user space handling provide
storage to cache the CPU ID and MM CID values which were written to user
space. That prepares for a quick check, which avoids the update when
nothing changed.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Link: https://patch.msgid.link/20251027084306.841964081@linutronix.de
Diffstat (limited to 'include/trace')
| -rw-r--r-- | include/trace/events/rseq.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/trace/events/rseq.h b/include/trace/events/rseq.h index 823b47d1ba1e..ce85d650bf4b 100644 --- a/include/trace/events/rseq.h +++ b/include/trace/events/rseq.h @@ -21,9 +21,9 @@ TRACE_EVENT(rseq_update, ), TP_fast_assign( - __entry->cpu_id = raw_smp_processor_id(); + __entry->cpu_id = t->rseq.ids.cpu_id; __entry->node_id = cpu_to_node(__entry->cpu_id); - __entry->mm_cid = task_mm_cid(t); + __entry->mm_cid = t->rseq.ids.mm_cid; ), TP_printk("cpu_id=%d node_id=%d mm_cid=%d", __entry->cpu_id, |