From: "Robin H. Johnson" <[email protected]> commit a90afe8d020da9298c98fddb19b7a6372e2feb45 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/[email protected] Signed-off-by: Robin H. Johnson <[email protected]> Signed-off-by: Steven Rostedt (VMware) <[email protected]> Signed-off-by: Thadeu Lima de Souza Cascardo <[email protected]> --- kernel/trace/trace_event_perf.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/kernel/trace/trace_event_perf.c b/kernel/trace/trace_event_perf.c index 083f648e3265..61e3a2620fa3 100644 --- a/kernel/trace/trace_event_perf.c +++ b/kernel/trace/trace_event_perf.c @@ -401,7 +401,8 @@ void *perf_trace_buf_alloc(int size, struct pt_regs **regs, int *rctxp) BUILD_BUG_ON(PERF_MAX_TRACE_SIZE % sizeof(unsigned long)); if (WARN_ONCE(size > PERF_MAX_TRACE_SIZE, - "perf buffer not large enough")) + "perf buffer not large enough, wanted %d, have %d", + size, PERF_MAX_TRACE_SIZE)) return NULL; *rctxp = rctx = perf_swevent_get_recursion_context(); -- 2.34.1
