Arnaldo Carvalho de Melo 7da36e94e7 perf evsel: Fix write_backwards fallback ... Commit b90dc17a5d "perf evsel: Add overwrite attribute and check write_backward" misunderstood the 'order' should be obeyed in __perf_evsel__open. But the way this was done for attr.write_backwards was buggy, as we need to check features in the inverse order of their introduction to the kernel, so that a newer tool checks first the newest perf_event_attr fields, detecting that the older kernel doesn't have support for them. Also, we can avoid calling sys_perf_event_open() if we have already detected the missing of write_backward. Cc: He Kuang <hekuang@huawei.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Fixes: b90dc17a5d ("perf evsel: Add overwrite attribute and check write_backward") Link: http://lkml.kernel.org/r/1466419645-75551-2-git-send-email-wangnan0@huawei.com Link: http://lkml.kernel.org/r/20160616214724.GI13337@kernel.org Signed-off-by: Wang Nan <wangnan0@huawei.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>		2016-06-21 13:18:35 -03:00
..
arch	perf/core improvements and fixes:	2016-06-08 09:34:15 +02:00
bench	perf bench: Remove one more die() call	2016-04-26 13:28:40 -03:00
config	kbuild: List libelf-devel as an alternative	2016-06-21 13:18:32 -03:00
Documentation	perf record: Add --dry-run option to check cmdline options	2016-06-21 13:18:35 -03:00
jvmti	perf jit: Add support for using TSC as a timestamp	2016-04-01 18:42:55 -03:00
python	perf python: Support the PERF_RECORD_SWITCH event	2015-10-07 19:41:50 -03:00
scripts	perf script: Update export-to-postgresql to support callchain export	2016-05-06 13:00:55 -03:00
tests	perf hists: Rename __hists__add_entry to hists__add_entry	2016-06-21 13:18:33 -03:00
trace	perf trace: Move seccomp args beautifiers to tools/perf/trace/beauty/	2016-05-11 13:06:00 -03:00
ui	perf hists: Replace perf_evsel arg perf_hpp_fmt's width callback	2016-06-15 10:50:04 -03:00
util	perf evsel: Fix write_backwards fallback	2016-06-21 13:18:35 -03:00
.gitignore	perf tools: Add arch/*/include/generated/ to .gitignore	2016-05-30 12:41:46 -03:00
Build	perf tools: Set and pass DOCDIR to builtin-report.c	2016-01-12 12:42:07 -03:00
builtin-annotate.c	perf hists: Rename __hists__add_entry to hists__add_entry	2016-06-21 13:18:33 -03:00
builtin-bench.c	perf subcmd: Create subcmd library	2015-12-17 14:27:14 -03:00
builtin-buildid-cache.c	perf symbols: Introduce DSO__NAME_KALLSYMS and DSO__NAME_KCORE	2016-05-16 23:11:48 -03:00
builtin-buildid-list.c	perf subcmd: Create subcmd library	2015-12-17 14:27:14 -03:00
builtin-config.c	perf config: Make show_config() use perf_config_set	2016-04-14 09:15:47 -03:00
builtin-data.c	perf subcmd: Create subcmd library	2015-12-17 14:27:14 -03:00
builtin-diff.c	perf hists: Rename __hists__add_entry to hists__add_entry	2016-06-21 13:18:33 -03:00
builtin-evlist.c	perf evlist: Add --trace-fields option to show trace fields	2016-01-08 14:23:02 -03:00
builtin-help.c	perf help: Make check_emacsclient_version to check strbuf APIs	2016-05-10 11:56:14 -03:00
builtin-inject.c	perf tools: Add time conversion event	2016-03-31 10:52:24 -03:00
builtin-kmem.c	perf callchain: Start moving away from global per thread cursors	2016-04-14 14:48:07 -03:00
builtin-kvm.c	perf evsel: Do not use globals in config()	2016-04-11 22:18:20 -03:00
builtin-list.c	perf subcmd: Create subcmd library	2015-12-17 14:27:14 -03:00
builtin-lock.c	perf subcmd: Create subcmd library	2015-12-17 14:27:14 -03:00
builtin-mem.c	perf mem: Add --ldlat option	2016-06-15 10:35:27 -03:00
builtin-probe.c	perf probe: Add --cache option to cache the probe definitions	2016-06-15 14:34:42 -03:00
builtin-record.c	perf record: Add --dry-run option to check cmdline options	2016-06-21 13:18:35 -03:00
builtin-report.c	perf stdio: Add use_callchain parameter to hists__fprintf	2016-06-15 10:48:02 -03:00
builtin-sched.c	perf sched map: Display only given cpus	2016-04-13 10:11:52 -03:00
builtin-script.c	perf script: Show call graphs when 1st event doesn't have it but some other has	2016-06-03 14:53:46 -03:00
builtin-stat.c	perf stat: Add missing aggregation headers for --metric-only CSV	2016-06-06 17:43:12 -03:00
builtin-timechart.c	perf tools: Set buildid dir under symfs when --symfs is provided	2016-05-20 11:43:58 -03:00
builtin-top.c	perf stdio: Add use_callchain parameter to hists__fprintf	2016-06-15 10:48:02 -03:00
builtin-trace.c	perf trace: Use the ptr->name beautifier as default for "filename" args	2016-05-23 16:41:00 -03:00
builtin-version.c	perf tools: Move cmd_version() to builtin-version.c	2015-12-09 13:42:03 -03:00
builtin.h	perf tools: Remove needless 'extern' from function prototypes	2016-03-23 15:06:35 -03:00
command-list.txt	perf tools: Do not show trace command if it's not compiled in	2016-01-08 12:46:17 -03:00
CREDITS
design.txt
Makefile	perf build tests: Do parallell builds with 'build-test'	2016-02-04 15:57:00 -03:00
Makefile.perf	perf tools: Build syscall table .c header from kernel's syscall_64.tbl	2016-04-08 09:58:14 -03:00
MANIFEST	perf bench: Fix detached tarball building due to missing 'perf bench memcpy' headers	2016-03-24 12:28:57 -03:00
perf-archive.sh
perf-completion.sh	perf tools: Avoid confusion with preloaded bash function for perf bash completion	2015-03-19 13:53:27 -03:00
perf-read-vdso.c
perf-sys.h	perf tools: Move generic barriers out of perf-sys.h	2015-05-08 16:05:08 -03:00
perf-with-kcore.sh	perf tools: Fix perf-with-kcore handling of arguments containing spaces	2015-08-06 16:48:27 -03:00
perf.c	perf tools: Remove --perf-dir and --work-dir	2016-06-21 13:18:34 -03:00
perf.h	perf tools: Ditch record_opts.callgraph_set	2016-04-18 12:26:27 -03:00