Messages in this thread Patch in this message | | | Date | Wed, 27 Oct 2021 22:29:17 -0400 | From | Steven Rostedt <> | Subject | [for-next][PATCH 2/3] tracing: Show size of requested perf buffer |
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From: "Robin H. Johnson" <robbat2@gentoo.org>
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> --- 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 fba8cb77a73a..a114549720d6 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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