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| /freebsd-11.0-release/sys/cddl/contrib/opensolaris/uts/common/dtrace/ | ||
| H A D | fasttrap.c | diff 250953 Fri May 24 03:37:08 MDT 2013 markj The fasttrap provider cleans up probes asynchronously when a process with USDT probes exits. This was previously done with a callout; however, it is possible to sleep while holding the DTrace mutexes, so a panic will occur on INVARIANTS kernels if the callout handler can't immediately acquire one of these mutexes. This panic will be frequently triggered on systems where a USDT-enabled program (perl, for instance) is often run. This revision changes the fasttrap cleanup mechanism so that a dedicated thread is used instead of a callout. The old behaviour is otherwise preserved. Reviewed by: rpaulo MFC after: 1 month |
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