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| author | Nicolas Saenz Julienne <nsaenzju@redhat.com> | 2021-07-21 13:47:26 +0200 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2021-07-23 14:45:53 +0200 |
| commit | 68e83498cb4fad31963b5c76a71e80b824bc316e (patch) | |
| tree | 23ab37016b6548a6acd613d10a224243b9dc8cfd /drivers/pcmcia | |
| parent | tracing: Clean up alloc_synth_event() (diff) | |
| download | linux-68e83498cb4fad31963b5c76a71e80b824bc316e.tar.xz linux-68e83498cb4fad31963b5c76a71e80b824bc316e.zip | |
ftrace: Avoid synchronize_rcu_tasks_rude() call when not necessary
synchronize_rcu_tasks_rude() triggers IPIs and forces rescheduling on
all CPUs. It is a costly operation and, when targeting nohz_full CPUs,
very disrupting (hence the name). So avoid calling it when 'old_hash'
doesn't need to be freed.
Link: https://lkml.kernel.org/r/20210721114726.1545103-1-nsaenzju@redhat.com
Signed-off-by: Nicolas Saenz Julienne <nsaenzju@redhat.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'drivers/pcmcia')
0 files changed, 0 insertions, 0 deletions