Messages in this thread Patch in this message | | | From | "Robin H. Johnson" <> | Subject | [PATCH 1/2] tracing: show size of requested buffer | Date | Mon, 30 Aug 2021 21:37:22 -0700 |
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If the perf buffer isn't large enough, provide a hint about how large it needs to be for whatever is running.
Signed-off-by: Robin H. Johnson <robbat2@gentoo.org> --- 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 03be4435d103..26eed4b89100 100644 --- a/kernel/trace/trace_event_perf.c +++ b/kernel/trace/trace_event_perf.c @@ -400,7 +400,8 @@ 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(); -- 2.33.0
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