Request for review 6988439: Parallel Class Loading test deadlock involving MethodData_lock and Pend, ing List Lock

Tom Rodriguez tom.rodriguez at
Thu Dec 9 11:24:01 PST 2010

On Dec 9, 2010, at 8:35 AM, Coleen Phillimore wrote:

> Summary: Don't acquire methodData_lock while holding pending list lock
> We discussed the alternative of allocating the methodData object from permgen before acquiring the MethodData_lock, but were concerned about leaking methodData objects in the permgen if another thread beats us to the locked region.  When we go to native memory for these objects this bug fix will be moot and removed.  This patch is to prevent the various hangs we've seen from occurring until then.

Do any of the caller assume that it if didn't trap that an MDO was created?


> open webrev at
> bug link at
> Thanks,
> Coleen

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