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5620196951
linux/tools/perf
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Arnaldo Carvalho de Melo 5620196951 perf: Make perf_event_output() propagate the output() return 
For the original mode of operation it isn't needed, since we report back
errors via PERF_RECORD_LOST records in the ring buffer, but for use in
bpf_perf_event_output() it is convenient to return the errors, basically
-ENOSPC.

Currently bpf_perf_event_output() returns an error indication, the last
thing it does, which is to push it to the ring buffer is that can fail
and if so, this failure won't be reported back to its users, fix it.

Reported-by: Jamal Hadi Salim <jhs@mojatatu.com>
Tested-by: Jamal Hadi Salim <jhs@mojatatu.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexei Starovoitov <alexei.starovoitov@gmail.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/r/20190118150938.GN5823@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-01-21 17:00:57 -03:00
..
arch perf powerpc: Rework syscall table generation 2019-01-10 10:34:52 -03:00
bench perf bench: Add epoll_ctl(2) benchmark 2018-11-21 22:39:55 -03:00
Documentation perf trace: Allow asking for not suppressing common string prefixes 2018-12-18 16:07:42 -03:00
examples/bpf perf: Make perf_event_output() propagate the output() return 2019-01-21 17:00:57 -03:00
include/bpf perf bpf: Move perf_event_output() from stdio.h to bpf.h 2018-12-18 12:23:58 -03:00
jvmti perf jvmti: Separate jvmti cmlr check 2018-11-21 22:39:58 -03:00
pmu-events nds32 patches for 4.21 2018-12-29 09:37:03 -08:00
python
scripts perf scripts python: exported-sql-viewer.py: Fix table find when table re-ordered 2018-11-05 14:53:00 -03:00
tests perf tools: Remove duplicate headers 2019-01-21 15:15:57 -03:00
trace perf beauty: Switch from using uapi/linux/fs.h to uapi/linux/mount.h 2019-01-08 14:09:33 -03:00
ui perf tools: Replace automatic const char[] variables by statics 2019-01-21 15:15:57 -03:00
util perf report: Dump s390 counter set data to file 2019-01-21 17:00:57 -03:00
.gitignore
Build
builtin-annotate.c perf tools: Remove perf_tool from event_op2 2018-09-19 10:25:10 -03:00
builtin-bench.c perf bench: Add epoll_ctl(2) benchmark 2018-11-21 22:39:55 -03:00
builtin-buildid-cache.c
builtin-buildid-list.c
builtin-c2c.c perf tools: Replace automatic const char[] variables by statics 2019-01-21 15:15:57 -03:00
builtin-config.c perf config: Show the configuration when no arguments are provided 2018-12-18 12:24:00 -03:00
builtin-data.c
builtin-diff.c perf hists: Clarify callchain disabling when available 2018-07-24 14:37:33 -03:00
builtin-evlist.c
builtin-ftrace.c
builtin-help.c perf help: Remove needless use of strncpy() 2018-12-17 14:59:18 -03:00
builtin-inject.c perf tools: Report itrace options in help 2018-09-19 15:06:59 -03:00
builtin-kallsyms.c
builtin-kmem.c perf tools: Replace automatic const char[] variables by statics 2019-01-21 15:15:57 -03:00
builtin-kvm.c perf tools: Allow specifying proc-map-timeout in config file 2018-12-17 14:56:57 -03:00
builtin-list.c
builtin-lock.c
builtin-mem.c
builtin-probe.c
builtin-record.c perf tools: Allow specifying proc-map-timeout in config file 2018-12-17 14:56:57 -03:00
builtin-report.c perf tools: Replace automatic const char[] variables by statics 2019-01-21 15:15:57 -03:00
builtin-sched.c perf tools: Replace automatic const char[] variables by statics 2019-01-21 15:15:57 -03:00
builtin-script.c perf thread-stack: Fix thread stack processing for the idle task 2019-01-02 11:03:17 -03:00
builtin-stat.c perf tools: Remove duplicate headers 2019-01-21 15:15:57 -03:00
builtin-timechart.c perf tools: Add missing open_memstream() prototype for systems lacking it 2018-12-18 12:23:57 -03:00
builtin-top.c perf top: Lift restriction on using callchains without "sym" in --sort 2019-01-08 13:28:13 -03:00
builtin-trace.c perf trace: Fix alignment for [continued] lines 2019-01-08 13:28:12 -03:00
builtin-version.c
builtin.h
check-headers.sh tools headers powerpc: Remove unistd.h 2019-01-10 10:42:08 -03:00
command-list.txt perf help: Add missing subcommand version 2018-09-19 14:53:36 -03:00
CREDITS
design.txt perf/doc: Update design.txt for exclude_{host|guest} flags 2019-01-21 11:01:18 +01:00
Makefile perf tools: Disable parallelism for 'make clean' 2018-08-20 08:54:58 -03:00
Makefile.config perf build: Don't unconditionally link the libbfd feature test to -liberty and -lz 2018-12-21 09:42:46 -03:00
Makefile.perf perf tools: Make find_vdso_map() more modular 2019-01-08 13:28:13 -03:00
MANIFEST
perf-archive.sh
perf-completion.sh
perf-read-vdso.c perf tools: Make find_vdso_map() more modular 2019-01-08 13:28:13 -03:00
perf-sys.h
perf-with-kcore.sh
perf.c
perf.h perf tools: Allow specifying proc-map-timeout in config file 2018-12-17 14:56:57 -03:00