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| author | Robin H. Johnson <robbat2@gentoo.org> | 2021-08-30 21:37:22 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-05-02 16:17:13 +0200 |
| commit | 78b92d50fe6ab79d536f4b12c5bde15f2751414d (patch) | |
| tree | 14485e051b731772a59779cf272fefdf0505e778 | |
| parent | 69dc8fc8307640b717b37056549d88a664273206 (diff) | |
| download | linux-stable-78b92d50fe6ab79d536f4b12c5bde15f2751414d.tar.gz linux-stable-78b92d50fe6ab79d536f4b12c5bde15f2751414d.tar.bz2 linux-stable-78b92d50fe6ab79d536f4b12c5bde15f2751414d.zip | |
tracing: Show size of requested perf buffer
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/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>
| -rw-r--r-- | kernel/trace/trace_event_perf.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/trace/trace_event_perf.c b/kernel/trace/trace_event_perf.c index f5b3bf0e69f6..5e68447588b7 100644 --- a/kernel/trace/trace_event_perf.c +++ b/kernel/trace/trace_event_perf.c @@ -394,7 +394,8 @@ 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(); |