Messages in this thread | | | Date | Wed, 31 Jul 2013 13:47:22 +0200 | From | Oleg Nesterov <> | Subject | Re: [for-next-3.11][PATCH 0/8] ftrace/tracing: Event file fixes and ftrace function hash fixes |
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On 07/30, Steven Rostedt wrote: > > Using the i_private and event_mutex > to verify that the event still exists to solve the race.
To remind, we also need the "debugfs: debugfs_remove_recursive() must not rely on list_empty(d_subdirs)" patch, otherwise we still have the problems with the opened files.
Just in case, we need this fix even if .open() does trace_array_get() or tracing_open_generic_file() (removed by recent changes), rmdir can be called before we increment the counter and the deleted dentry breaks debugfs_remove_recursive().
But after the recent changes this fix becomes more important. An opened file confuses debugfs_remove_recursive() and after that you can't create another probe.
Oleg.
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