From: David Ahern <dsahern@gmail.com>
Date: Fri, 20 Jul 2012 23:25:47 +0000 (-0600)
Subject: perf kvm: Set name for VM process in guest machine
X-Git-Tag: v3.6-rc1~32^2~21^2~17
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5cd95c2db479aa7a66f6fa572dfa410c6314c78e;p=pandora-kernel.git

perf kvm: Set name for VM process in guest machine

COMM events are not generated in the context of a guest machine, so the
thread name is never set for the VMM process. For example, the qemu-kvm
name applies to the process in the host machine, not the guest machine.
So, samples for guest machines are currently displayed as:

    99.67%     :5671  [unknown]         [g] 0xffffffff81366b41

where 5671 is the pid of the VMM. With this patch the samples in the guest
machine are shown as:

    18.43%  [guest/5671]  [unknown]           [g] 0xffffffff810d68b7

Tested-by: Jiri Olsa <jolsa@redhat.com>
Signed-off-by: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1342826756-64663-3-git-send-email-dsahern@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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