path: root/include/linux/perf_event.h
diff options
authorJakub Kicinski <kuba@kernel.org>2021-10-07 15:24:06 -0700
committerJakub Kicinski <kuba@kernel.org>2021-10-07 15:24:06 -0700
commit9fe1155233c8290ca6e206053e531ef87f9026ea (patch)
treeef0d45b2562e01beb8ce4cb4cd016155b4e32a65 /include/linux/perf_event.h
parentethernet: ti: cpts: Use devm_kcalloc() instead of devm_kzalloc() (diff)
parentMerge tag 'nfsd-5.15-3' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
No conflicts. Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'include/linux/perf_event.h')
1 files changed, 3 insertions, 1 deletions
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 0cbc5dfe1110..2c41c8da1515 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -684,7 +684,9 @@ struct perf_event {
* timestamp shadows the actual context timing but it can
* be safely used in NMI interrupt context. It reflects the
- * context time as it was when the event was last scheduled in.
+ * context time as it was when the event was last scheduled in,
+ * or when ctx_sched_in failed to schedule the event because we
+ * run out of PMC.
* ctx_time already accounts for ctx->timestamp. Therefore to
* compute ctx_time for a sample, simply add perf_clock().