linux/tools
Taeung Song 55421b4fb7 perf config: Allow creating empty config set for config file autogeneration
When there isn't a config file (e.g. ~/.perfconfig) or it has nothing,
the config set wasn't created.

If the config set does not exist, a config file can't be autogenerated.

So allow creating a empty config set in the above case,
then we can support the config file autogeneration.

Before:

  $ rm -f ~/.perfconfig
  $ perf config --user report.children=false

  $ cat ~/.perfconfig
  cat: /root/.perfconfig: No such file or directory

But I think it should work even if there isn't a config file.

After:

  $ rm -f ~/.perfconfig
  $ perf config --user report.children=false

  $ cat ~/.perfconfig
  # this file is auto-generated.
  [report]
      children = false

NOTE:

As a result, if perf_config_set__init() fails, it looks as if the config
set isn't freed. But it isn't a problem.  Because the config set will be
freed by perf_config_set__delete() at the end of cmd_config().

Signed-off-by: Taeung Song <treeze.taeung@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/1504754336-9824-1-git-send-email-treeze.taeung@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-09-13 09:49:16 -03:00
..
accounting
arch Merge branch 'parisc-4.14-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux 2017-09-05 09:37:11 -07:00
build tools build tests: Don't hardcode gcc name 2017-08-28 16:44:44 -03:00
cgroup
firewire
gpio
hv Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2017-09-06 14:45:08 -07:00
iio iio: tools: add install section 2017-08-09 14:31:58 +01:00
include perf/urgent fixes: 2017-09-13 09:25:10 +02:00
kvm/kvm_stat tools/kvm_stat: add '-f help' to get the available event list 2017-07-26 19:04:53 +02:00
laptop
leds
lib perf/urgent fixes: 2017-09-13 09:25:10 +02:00
net
nfsd
objtool objtool: Handle GCC stack pointer adjustment bug 2017-08-30 10:48:41 +02:00
pci tools: PCI: Add a missing option help line 2017-08-29 16:03:34 -05:00
pcmcia
perf perf config: Allow creating empty config set for config file autogeneration 2017-09-13 09:49:16 -03:00
power ACPI updates for v4.14-rc1 2017-09-05 12:45:03 -07:00
scripts perf tools: Robustify detection of clang binary 2017-08-28 16:44:46 -03:00
spi spi: tools: add install section 2017-07-26 12:25:28 +01:00
testing Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2017-09-11 18:34:47 -07:00
thermal/tmon
time
usb usbip: auto retry for concurrent attach 2017-08-31 18:08:45 +02:00
virtio
vm
Makefile spi: Updates for v4.14 2017-09-05 11:40:38 -07:00