[PATCH 00/53] perf tools: Bugfix, BPF improvement and perf record flight record mode · Wang Nan <hidden> · 2016-01-11
[PATCH 27/53] perf/core: Put size of a sample at the end of it by PERF_SAMPLE_TAILSIZE · Wang Nan <hidden> · 2016-01-11
Re: [PATCH 27/53] perf/core: Put size of a sample at the end of it by PERF_SAMPLE_TAILSIZE · Alexei Starovoitov <hidden> · 2016-01-11
Re: [PATCH 27/53] perf/core: Put size of a sample at the end of it by PERF_SAMPLE_TAILSIZE · Wangnan (F) <hidden> · 2016-01-12
Re: [PATCH 27/53] perf/core: Put size of a sample at the end of it by PERF_SAMPLE_TAILSIZE · Alexei Starovoitov <hidden> · 2016-01-12
Re: [PATCH 27/53] perf/core: Put size of a sample at the end of it by PERF_SAMPLE_TAILSIZE · Wangnan (F) <hidden> · 2016-01-12
Re: [PATCH 27/53] perf/core: Put size of a sample at the end of it by PERF_SAMPLE_TAILSIZE · Alexei Starovoitov <hidden> · 2016-01-12
Re: [PATCH 27/53] perf/core: Put size of a sample at the end of it by PERF_SAMPLE_TAILSIZE · Wangnan (F) <hidden> · 2016-01-13
Re: [PATCH 27/53] perf/core: Put size of a sample at the end of it by PERF_SAMPLE_TAILSIZE · Alexei Starovoitov <hidden> · 2016-01-13
Re: [PATCH 27/53] perf/core: Put size of a sample at the end of it by PERF_SAMPLE_TAILSIZE · Peter Zijlstra <peterz@infradead.org> · 2016-01-12
Re: [PATCH 27/53] perf/core: Put size of a sample at the end of it by PERF_SAMPLE_TAILSIZE · Peter Zijlstra <peterz@infradead.org> · 2016-01-12
[PATCH 26/53] perf data: Support converting data from bpf_perf_event_output() · Wang Nan <hidden> · 2016-01-11
[PATCH 20/53] perf record: Apply config to BPF objects before recording · Wang Nan <hidden> · 2016-01-11
[PATCH 23/53] perf tools: Support setting different slots in a BPF map separately · Wang Nan <hidden> · 2016-01-11
[PATCH 01/53] perf tools: Add -lutil in python lib list for broken python-config · Wang Nan <hidden> · 2016-01-11
Re: [PATCH 01/53] perf tools: Add -lutil in python lib list for broken python-config · Jiri Olsa <hidden> · 2016-01-12
[PATCH 49/53] perf tools: Consider TAILSIZE bit when caclulate is_pos · Wang Nan <hidden> · 2016-01-11
[PATCH 52/53] perf record: Toggle tailsize ring buffer for reading · Wang Nan <hidden> · 2016-01-11
[PATCH 43/53] perf tools: Add evlist channel helpers · Wang Nan <hidden> · 2016-01-11
[PATCH 51/53] perf record: Read from tailsize ring buffer · Wang Nan <hidden> · 2016-01-11
[PATCH 41/53] perf record: Ensure return non-zero rc when mmap fail · Wang Nan <hidden> · 2016-01-11
[PATCH 40/53] perf record: Generate tracking events for process forked by perf · Wang Nan <hidden> · 2016-01-11
[PATCH 42/53] perf record: Prevent reading invalid data in record__mmap_read · Wang Nan <hidden> · 2016-01-11
Re: [PATCH 42/53] perf record: Prevent reading invalid data in record__mmap_read · Sergei Shtylyov <hidden> · 2016-01-11
Re: [PATCH 42/53] perf record: Prevent reading invalid data in record__mmap_read · Arnaldo Carvalho de Melo <hidden> · 2016-01-11
Re: [PATCH 42/53] perf record: Prevent reading invalid data in record__mmap_read · Arnaldo Carvalho de Melo <hidden> · 2016-01-11
[PATCH 44/53] perf tools: Automatically add new channel according to evlist · Wang Nan <hidden> · 2016-01-11
[PATCH 46/53] perf tools: Squash overwrite setting into channel · Wang Nan <hidden> · 2016-01-11
[PATCH 34/53] perf record: Use OPT_BOOLEAN_SET for buildid cache related options · Wang Nan <hidden> · 2016-01-11
[PATCH 53/53] perf record: Allow generate tracking events at the end of output · Wang Nan <hidden> · 2016-01-11
[PATCH 45/53] perf tools: Operate multiple channels · Wang Nan <hidden> · 2016-01-11
[PATCH 48/53] perf tools: Enable overwrite settings · Wang Nan <hidden> · 2016-01-11
[PATCH 50/53] perf tools: Set tailsize attribut bit for overwrite events · Wang Nan <hidden> · 2016-01-11
[PATCH 47/53] perf record: Don't read from and poll overwrite channel · Wang Nan <hidden> · 2016-01-11
[PATCH 09/53] perf: bpf: Fix build breakage due to libbpf · Wang Nan <hidden> · 2016-01-11
[PATCH 30/53] perf record: Extract synthesize code to record__synthesize() · Wang Nan <hidden> · 2016-01-11
[PATCH 28/53] perf tools: Move timestamp creation to util · Wang Nan <hidden> · 2016-01-11
[PATCH 31/53] perf tools: Add perf_data_file__switch() helper · Wang Nan <hidden> · 2016-01-11
[PATCH 39/53] perf record: Re-synthesize tracking events after output switching · Wang Nan <hidden> · 2016-01-11
[PATCH 33/53] perf record: Introduce record__finish_output() to finish a perf.data · Wang Nan <hidden> · 2016-01-11
[PATCH 07/53] tools: Move Makefile.arch from perf/config to tools/scripts · Wang Nan <hidden> · 2016-01-11
Re: [PATCH 07/53] tools: Move Makefile.arch from perf/config to tools/scripts · Wangnan (F) <hidden> · 2016-01-11
Re: [PATCH 07/53] tools: Move Makefile.arch from perf/config to tools/scripts · Arnaldo Carvalho de Melo <acme@kernel.org> · 2016-01-11
[PATCH 17/53] perf test: Improve bp_signal · Wang Nan <hidden> · 2016-01-11
Re: [PATCH 17/53] perf test: Improve bp_signal · Arnaldo Carvalho de Melo <acme@kernel.org> · 2016-01-11
Re: [PATCH 17/53] perf test: Improve bp_signal · Wangnan (F) <hidden> · 2016-01-12
Re: [PATCH 17/53] perf test: Improve bp_signal · Jiri Olsa <hidden> · 2016-01-12
Re: [PATCH 17/53] perf test: Improve bp_signal · Arnaldo Carvalho de Melo <acme@kernel.org> · 2016-01-12
Re: [PATCH 17/53] perf test: Improve bp_signal · Will Deacon <hidden> · 2016-01-12
[PATCH 04/53] perf tools: Pass O option to Makefile.perf in build-test · Wang Nan <hidden> · 2016-01-11
[PATCH 08/53] perf tools: Add missing sources in perf's MANIFEST · Wang Nan <hidden> · 2016-01-11
[PATCH 32/53] perf record: Turns auxtrace_snapshot_enable into 3 states · Wang Nan <hidden> · 2016-01-11
[PATCH 36/53] perf record: Split output into multiple files via '--switch-output' · Wang Nan <hidden> · 2016-01-11
[PATCH 06/53] perf tools: Fix PowerPC native building · Wang Nan <hidden> · 2016-01-11
[PATCH 15/53] perf tools: Fix symbols searching for offline module in buildid-cache · Wang Nan <hidden> · 2016-01-11
[PATCH 14/53] perf test: Check environment before start real BPF test · Wang Nan <hidden> · 2016-01-11
Re: [PATCH 14/53] perf test: Check environment before start real BPF test · Arnaldo Carvalho de Melo <acme@kernel.org> · 2016-01-11
Re: [PATCH 14/53] perf test: Check environment before start real BPF test · Wangnan (F) <hidden> · 2016-01-12
Re: [PATCH 14/53] perf test: Check environment before start real BPF test · Arnaldo Carvalho de Melo <acme@kernel.org> · 2016-01-12
[PATCH 21/53] perf tools: Enable passing event to BPF object · Wang Nan <hidden> · 2016-01-11
[PATCH 02/53] perf tools: Fix phony build target for build-test · Wang Nan <hidden> · 2016-01-11
[PATCH 05/53] perf tools: Test correct path of perf in build-test · Wang Nan <hidden> · 2016-01-11
Re: [PATCH 05/53] perf tools: Test correct path of perf in build-test · Arnaldo Carvalho de Melo <acme@kernel.org> · 2016-01-11
Re: [PATCH 05/53] perf tools: Test correct path of perf in build-test · Arnaldo Carvalho de Melo <acme@kernel.org> · 2016-01-11
Re: [PATCH 05/53] perf tools: Test correct path of perf in build-test · Arnaldo Carvalho de Melo <acme@kernel.org> · 2016-01-11
Re: [PATCH 05/53] perf tools: Test correct path of perf in build-test · Arnaldo Carvalho de Melo <acme@kernel.org> · 2016-01-11
Re: [PATCH 05/53] perf tools: Test correct path of perf in build-test · Wangnan (F) <hidden> · 2016-01-12
Re: [PATCH 05/53] perf tools: Test correct path of perf in build-test · Arnaldo Carvalho de Melo <acme@kernel.org> · 2016-01-12
[PATCH 16/53] perf tools: Fix mmap2 event allocation in synthesize code · Wang Nan <hidden> · 2016-01-11
[PATCH 11/53] perf test: Fix false TEST_OK result for 'perf test hist' · Wang Nan <hidden> · 2016-01-11
Re: [PATCH 11/53] perf test: Fix false TEST_OK result for 'perf test hist' · Sergei Shtylyov <hidden> · 2016-01-11
Re: [PATCH 11/53] perf test: Fix false TEST_OK result for 'perf test hist' · Arnaldo Carvalho de Melo <hidden> · 2016-01-11
Re: [PATCH 11/53] perf test: Fix false TEST_OK result for 'perf test hist' · Arnaldo Carvalho de Melo <acme@kernel.org> · 2016-01-11
[PATCH 19/53] perf tools: Enable BPF object configure syntax · Wang Nan <hidden> · 2016-01-11
[PATCH 12/53] perf test: Reset err after using it hold errcode in hist testcases · Wang Nan <hidden> · 2016-01-11
[PATCH 29/53] perf tools: Make ordered_events reusable · Wang Nan <hidden> · 2016-01-11
Re: [PATCH 29/53] perf tools: Make ordered_events reusable · Arnaldo Carvalho de Melo <acme@kernel.org> · 2016-01-11
[PATCH 10/53] tools build: Add BPF feature check to test-all · Wang Nan <hidden> · 2016-01-11
[PATCH 18/53] perf tools: Add API to config maps in bpf object · Wang Nan <hidden> · 2016-01-11
[PATCH 37/53] perf record: Force enable --timestamp-filename when --switch-output is provided · Wang Nan <hidden> · 2016-01-11
[PATCH 25/53] perf tools: Introduce bpf-output event · Wang Nan <hidden> · 2016-01-11
[PATCH 13/53] perf tools: Prevent calling machine__delete() on non-allocated machine · Wang Nan <hidden> · 2016-01-11
Re: [PATCH 13/53] perf tools: Prevent calling machine__delete() on non-allocated machine · Arnaldo Carvalho de Melo <acme@kernel.org> · 2016-01-11
Re: [PATCH 13/53] perf tools: Prevent calling machine__delete() on non-allocated machine · Wangnan (F) <hidden> · 2016-01-12
Re: [PATCH 13/53] perf tools: Prevent calling machine__delete() on non-allocated machine · Arnaldo Carvalho de Melo <acme@kernel.org> · 2016-01-12
[PATCH 24/53] perf tools: Enable indices setting syntax for BPF maps · Wang Nan <hidden> · 2016-01-11
[PATCH 03/53] perf tools: Set parallel making options build-test · Wang Nan <hidden> · 2016-01-11
[PATCH 22/53] perf tools: Support perf event alias name · Wang Nan <hidden> · 2016-01-11
[PATCH 35/53] perf record: Add '--timestamp-filename' option to append timestamp to output filename · Wang Nan <hidden> · 2016-01-11
[PATCH 38/53] perf record: Disable buildid cache options by default in switch output mode · Wang Nan <hidden> · 2016-01-11

Re: [PATCH 42/53] perf record: Prevent reading invalid data in record__mmap_read

From: Arnaldo Carvalho de Melo <hidden>
Date: 2016-01-11 15:01:55
Also in: lkml

Em Mon, Jan 11, 2016 at 01:00:07PM -0200, Arnaldo Carvalho de Melo escreveu:

Em Mon, Jan 11, 2016 at 05:21:44PM +0300, Sergei Shtylyov escreveu:

quoted

On 01/11/2016 04:48 PM, Wang Nan wrote:

quoted

 	size = head - old;
+	if (size > (unsigned long)(md->mask) + 1) {
+		WARN_ONCE(1, "WARNING: failed to keep up with mmap data. (warn only once)\n");

   WARNING is already printed by WARN*(), no?

No, at least not in tools/include/asm/bug.h, perhaps include/asm/bug.h
has this now and tools/ drifted? Checking now...

Indeed, need to bring it closer together again...

- Arnaldo

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