linux-kernel - [PATCH 14/17] perf tools: Do not create kernel maps in sample_

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Date:   Tue,  6 Feb 2018 19:18:10 +0100
From:   Jiri Olsa <jolsa@...nel.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     lkml <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        David Ahern <dsahern@...il.com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: [PATCH 14/17] perf tools: Do not create kernel maps in sample__resolve

There's no need for kernel maps to be allocated at this
point - sample processing.

We search for kernel maps using the kernel map_groups in
machine::kmaps which is static. If vmlinux maps for any
reason still don't exist, the search correctly fails
because they are not in the map group.

Link: http://lkml.kernel.org/n/tip-f1swg55ooc3sihcvadgzkw1z@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@...nel.org>
---
 tools/perf/util/event.c | 11 -----------
 1 file changed, 11 deletions(-)

diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index 4644e751a3e3..f0a6cbd033cc 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -1588,17 +1588,6 @@ int machine__resolve(struct machine *machine, struct addr_location *al,
 		return -1;
 
 	dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
-	/*
-	 * Have we already created the kernel maps for this machine?
-	 *
-	 * This should have happened earlier, when we processed the kernel MMAP
-	 * events, but for older perf.data files there was no such thing, so do
-	 * it now.
-	 */
-	if (sample->cpumode == PERF_RECORD_MISC_KERNEL &&
-	    machine__kernel_map(machine) == NULL)
-		machine__create_kernel_maps(machine);
-
 	thread__find_addr_map(thread, sample->cpumode, MAP__FUNCTION, sample->ip, al);
 	dump_printf(" ...... dso: %s\n",
 		    al->map ? al->map->dso->long_name :
-- 
2.13.6