linux-kernel - Re: [PATCH 5.0 05/93] perf data: Dont store auxtrace index for directory data file

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Message-ID: <20190419132527.GB17719@sasha-vm>
Date:   Fri, 19 Apr 2019 09:25:27 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     Thomas Backlund <tmb@...eia.org>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        Jiri Olsa <jolsa@...nel.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Alexey Budankov <alexey.budankov@...ux.intel.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Stephane Eranian <eranian@...gle.com>,
        Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: Re: [PATCH 5.0 05/93] perf data: Dont store auxtrace index for
 directory data file

On Thu, Apr 18, 2019 at 10:28:47PM +0300, Thomas Backlund wrote:
>Den 18-04-2019 kl. 20:56, skrev Greg Kroah-Hartman:
>>[ Upstream commit cd3dd8dd8ff62374d90cb3f2e54b8c94106c7810 ]
>>
>>We can't store the auxtrace index when we store into multiple files,
>>because we keep only offset for it, not the file.
>>
>>The auxtrace data will be processed correctly in the 'pipe' mode.
>>
>>Signed-off-by: Jiri Olsa <jolsa@...nel.org>
>>Cc: Adrian Hunter <adrian.hunter@...el.com>
>>Cc: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
>>Cc: Alexey Budankov <alexey.budankov@...ux.intel.com>
>>Cc: Andi Kleen <ak@...ux.intel.com>
>>Cc: Namhyung Kim <namhyung@...nel.org>
>>Cc: Peter Zijlstra <peterz@...radead.org>
>>Cc: Stephane Eranian <eranian@...gle.com>
>>Link: http://lkml.kernel.org/r/20190308134745.5057-3-jolsa@kernel.org
>>Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
>>Signed-off-by: Sasha Levin <sashal@...nel.org>
>>---
>>  tools/perf/builtin-record.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>>diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
>>index 882285fb9f64..3fd154f1701b 100644
>>--- a/tools/perf/builtin-record.c
>>+++ b/tools/perf/builtin-record.c
>>@@ -386,7 +386,7 @@ static int record__process_auxtrace(struct perf_tool *tool,
>>  	size_t padding;
>>  	u8 pad[8] = {0};
>>-	if (!perf_data__is_pipe(data)) {
>>+	if (!perf_data__is_pipe(data) && !perf_data__is_dir(data)) {
>>  		off_t file_offset;
>>  		int fd = perf_data__fd(data);
>>  		int err;
>>
>
>
>This breaks the build with:
>
>builtin-record.c: In function 'record__process_auxtrace':
>builtin-record.c:389:36: warning: implicit declaration of function 
>'perf_data__is_dir'; did you mean 'perf_data__is_pipe'? 
>[-Wimplicit-function-declaration]
>  if (!perf_data__is_pipe(data) && !perf_data__is_dir(data)) {
>                                    ^~~~~~~~~~~~~~~~~
>
>Looks like it depends atleast on:
>
>commit ec65def1045e4c7817b7f741a86dadae82877a93
>Author: Jiri Olsa <jolsa@...nel.org>
>Date:   Fri Mar 8 14:47:35 2019 +0100
>
>    perf data: Support having perf.data stored as a directory
>
>
>Maybe better to drop it.

I've dropped it, thanks!

--
Thanks,
Sasha