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authorArnaldo Carvalho de Melo <acme@redhat.com>2013-09-24 16:04:32 +0200
committerArnaldo Carvalho de Melo <acme@redhat.com>2013-10-09 22:43:18 +0200
commit75b757ca90469e990e6901f4a9497fe4161f7f5a (patch)
tree150f0a3949832cd136cd045cdd619eae47f4b9f3 /kernel/rcutree_trace.c
parentperf trace: Beautify mlock & friends 'addr' arg (diff)
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perf trace: Show path associated with fd in live sessions
For live sessions we can just access /proc to map an fd to its path, on a best effort way, i.e. sometimes the fd will have gone away when we try to do the mapping, as it is done in a lazy way, only when a reference to such fd is made then the path will be looked up in /proc. This is disabled when processing perf.data files, where we will have to have a way to get getname events, be it via an on-the-fly 'perf probe' event or after a vfs_getname tracepoint is added to the kernel. A first step will be to synthesize such event for the use cases where the threads in the monitored workload exist already. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-1r1ti33ye1666jezu2d8q1c3@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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