Commits
Yunlong Song committed c4ac732a037
perf lock: Support using -f to override perf.data file ownership
Enable perf lock to use perf.data when it is not owned by current user
or root.
Example:
# perf lock record ls
# chown Yunlong.Song:Yunlong.Song perf.data
# ls -al perf.data
-rw------- 1 Yunlong.Song Yunlong.Song 4880686 Apr 2 14:14 perf.data
# id
uid=0(root) gid=0(root) groups=0(root),64(pkcs11)
Before this patch:
# perf lock report
File perf.data not owned by current user or root (use -f to override)
Initializing perf session failed
# perf lock report -f
Error: unknown switch `f'
usage: perf lock report [<options>]
-k, --key <acquired> key for sorting (acquired / contended /
avg_wait / wait_total / wait_max / wait_min)
As shown above, the -f option does not work at all.
After this patch:
# perf lock report
File perf.data not owned by current user or root (use -f to override)
Initializing perf session failed
# perf lock report -f
Name acquired contended avg wait (ns) total wait (ns) ...
&ldata->output_l... 128 0 0 0 ...
&ctx->lock 114 0 0 0 ...
&p->pi_lock 112 0 0 0 ...
&(&pool->lock)->... 112 0 0 0 ...
&(&dentry->d_loc... 70 0 0 0 ...
&(&newf->file_lo... 62 0 0 0 ...
&(&fs->lock)->rl... 43 0 0 0 ...
...
As shown above, the -f option really works now.
Signed-off-by: Yunlong Song <yunlong.song@huawei.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1427982439-27388-6-git-send-email-yunlong.song@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>