perf: numatop: don't assume current is ok to use

When we don't get task information from the migratepages trace event
we should just live with our lack of info, rather than account it to the
currently running task. This patch creates a group of anonymous page
migrators that will collect all these anonymous migrations. The
currently running task will still get credit for being the manager, and
can be seen with the 'managers' option.

Signed-off-by: Andrew Jones <>
1 file changed