I'll have to admit to having only a beginner's grasp of this stuff, but I do believe that that was what the OSDL patch did. Jan also tried a simpler patch, which didn't work either. Both Jan and Tom have expressed the opinion that the only solution is to make the BufrMgrLock more granular (as in, not monolithic) but this is a huge task.
It's worth noting that I did a lot of work toward that goal (making the BufMgrLock more granular) earlier in 2004, but unfortunately wasn't able to get it finished before leaving for the summer. I can't guarantee that the approach I took was the right one, but if anyone's interested in working on this area then it might save some time to start with previous work. I want to take another shot at doing this for 8.1, although I don't know right now if I'll be able to.
-Neil
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