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| author |   Dongsheng Yang <yangds.fnst@cn.fujitsu.com> | 2013-12-09 12:15:11 -0500 |
|---|---|---|
| committer |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2013-12-09 15:19:11 -0300 |
| commit | 100b907350c87aa1f3b5dbd95bac3ad5aad3e108 (patch) | |
| tree | cc0efec601b600fa65316bdfcda0a261e6231a58 /tools/perf/builtin-kvm.c | |
| parent | perf evlist: Fix mmap pages rounding to power of 2 (diff) | |
| download | linux-dev-100b907350c87aa1f3b5dbd95bac3ad5aad3e108.tar.xz linux-dev-100b907350c87aa1f3b5dbd95bac3ad5aad3e108.zip | |
perf kvm: Introduce option -v for perf kvm command.
As there is no -v option for perf kvm, the all debug message for perf
kvm will nerver be printed out to user.
Example:
# perf kvm --guestmount /tmp/guestmount/ record -a
Not enough memory for reading perf file header
It is confusing message for newbies such as me. With this patch applied,
we can use -v option to get the detail.
Example:
# perf kvm --guestmount /tmp/guestmount/ record -a -v
Can't access file /tmp/guestmount//15069/proc/kallsyms
Not enough memory for reading perf file header
Signed-off-by: Dongsheng Yang <yangds.fnst@cn.fujitsu.com>
Cc: David Ahern <dsahern@gmail.com>
Link: http://lkml.kernel.org/r/1386609311-23889-1-git-send-email-yangds.fnst@cn.fujitsu.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/builtin-kvm.c')
| -rw-r--r-- | tools/perf/builtin-kvm.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c index f8bf5f244d77..d9cc0e3f284f 100644 --- a/tools/perf/builtin-kvm.c +++ b/tools/perf/builtin-kvm.c @@ -1690,6 +1690,8 @@ int cmd_kvm(int argc, const char **argv, const char *prefix __maybe_unused) "file", "file saving guest os /proc/kallsyms"), OPT_STRING(0, "guestmodules", &symbol_conf.default_guest_modules, "file", "file saving guest os /proc/modules"), + OPT_INCR('v', "verbose", &verbose, + "be more verbose (show counter open errors, etc)"), OPT_END() }; |