| commit | 8d707e8eb4de4b930573155ab4df4b3270ee25dd | [log] [tgz] |
|---|---|---|
| author | Steven Rostedt <srostedt@redhat.com> | Tue Jun 16 21:22:48 2009 -0400 |
| committer | Steven Rostedt <rostedt@goodmis.org> | Wed Jun 17 14:16:27 2009 -0400 |
| tree | 2594b38c73fa1c944587f62a2f9ce70fe4f90ce4 | |
| parent | d47882078f05c2cb46b85f1e12a58ed9315b9d63 [diff] |
ring-buffer: do not grab locks in nmi If ftrace_dump_on_oops is set, and an NMI detects a lockup, then it will need to read from the ring buffer. But the read side of the ring buffer still takes locks. This patch adds a check on the read side that if it is in an NMI, then it will disable the ring buffer and not take any locks. Reads can still happen on a disabled ring buffer. Signed-off-by: Steven Rostedt <rostedt@goodmis.org>