tracing: Show size of requested perf buffer
commit a90afe8d upstream. If the perf buffer isn't large enough, provide a hint about how large it needs to be for whatever is running. Link: https://lkml.kernel.org/r/20210831043723.13481-1-robbat2@gentoo.org Signed-off-by: Robin H. Johnson <robbat2@gentoo.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@igalia.com>
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