linux-kernel - [PATCH 02/26] perf machine: Set ksymbol dso as loaded on arrival

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Date:   Mon, 13 Apr 2020 13:51:39 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Ingo Molnar <mingo@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>
Cc:     Jiri Olsa <jolsa@...nel.org>, Namhyung Kim <namhyung@...nel.org>,
        Clark Williams <williams@...hat.com>,
        linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
        Song Liu <songliubraving@...com>,
        Alexei Starovoitov <ast@...nel.org>,
        Andrii Nakryiko <andriin@...com>,
        BjÃ¶rn TÃ¶pel 
        <bjorn.topel@...el.com>, Daniel Borkmann <daniel@...earbox.net>,
        "David S . Miller" <davem@...hat.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Jesper Dangaard Brouer <hawk@...nel.org>,
        John Fastabend <john.fastabend@...il.com>,
        Martin KaFai Lau <kafai@...com>, Yonghong Song <yhs@...com>,
        Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: [PATCH 02/26] perf machine: Set ksymbol dso as loaded on arrival

From: Jiri Olsa <jolsa@...nel.org>

There's no special load action for ksymbol data on map__load/dso__load
action, where the kernel is getting loaded. It only gets confused with
kernel kallsyms/vmlinux load for bpf object, which fails and could mess
up with the map.

Disabling any further load of the map for ksymbol related dso/map.

Signed-off-by: Jiri Olsa <jolsa@...nel.org>
Acked-by: Song Liu <songliubraving@...com>
Cc: Alexei Starovoitov <ast@...nel.org>
Cc: Andrii Nakryiko <andriin@...com>
Cc: BjÃ¶rn TÃ¶pel <bjorn.topel@...el.com>
Cc: Daniel Borkmann <daniel@...earbox.net>
Cc: David S. Miller <davem@...hat.com>
Cc: Jakub Kicinski <kuba@...nel.org>
Cc: Jesper Dangaard Brouer <hawk@...nel.org>
Cc: John Fastabend <john.fastabend@...il.com>
Cc: Martin KaFai Lau <kafai@...com>
Cc: Yonghong Song <yhs@...com>
Link: https://lore.kernel.org/bpf/20200312195610.346362-15-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/machine.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index 97142e9671be..06aa4e4db63d 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -759,6 +759,7 @@ static int machine__process_ksymbol_register(struct machine *machine,
 		map->start = event->ksymbol.addr;
 		map->end = map->start + event->ksymbol.len;
 		maps__insert(&machine->kmaps, map);
+		dso__set_loaded(dso);
 	}
 
 	sym = symbol__new(map->map_ip(map, map->start),
-- 
2.21.1