From 058b38ccd2af9e5c95590b018e8425fa148d7aca Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Thu, 2 Jan 2025 16:50:39 -0300 Subject: [PATCH] perf top: Don't complain about lack of vmlinux when not resolving some kernel samples Recently we got a case where a kernel sample wasn't being resolved due to a bug that was not setting the end address on kernel functions implemented in assembly (see Link: tag), and then those were not being found by machine__resolve() -> map__find_symbol(). So we ended up with: # perf top --stdio PerfTop: 0 irqs/s kernel: 0% exact: 0% lost: 0/0 drop: 0/0 [cycles/P] ----------------------------------------------------------------------- Warning: A vmlinux file was not found. Kernel samples will not be resolved. ^Z [1]+ Stopped perf top --stdio # But then resolving all other kernel symbols. So just fixup the logic to only print that warning when there are no symbols in the kernel map. Fixes: d88205db9caa0e9d ("perf dso: Add dso__has_symbols() method") Reviewed-by: Namhyung Kim Cc: Adrian Hunter Cc: Ian Rogers Cc: Christophe Leroy Cc: James Clark Cc: Jiri Olsa Cc: Kan Liang Link: https://lore.kernel.org/lkml/Z3buKhcCsZi3_aGb@x1 Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-top.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c index 724a79386321..ca3e8eca6610 100644 --- a/tools/perf/builtin-top.c +++ b/tools/perf/builtin-top.c @@ -809,7 +809,7 @@ static void perf_event__process_sample(const struct perf_tool *tool, * invalid --vmlinux ;-) */ if (!machine->kptr_restrict_warned && !top->vmlinux_warned && - __map__is_kernel(al.map) && map__has_symbols(al.map)) { + __map__is_kernel(al.map) && !map__has_symbols(al.map)) { if (symbol_conf.vmlinux_name) { char serr[256]; -- 2.50.1