On Wed, Apr 25, 2007 at 10:20:25PM +0400, Oleg Derevenetz wrote: > ??????? Kris Kennaway <[EMAIL PROTECTED]>: > > > On Wed, Apr 25, 2007 at 12:14:20PM +0400, Oleg Derevenetz wrote: > > > > > > Until you (or a developer) have analyzed the resulting information, > > > > you cannot definitively determine whether or not your problem is > > the > > > > same as a given random other problem, and you may just confuse the > > > > issue by making claims of similarity when you are really reporting > > a > > > > completely separate problem. > > > > > > Not all people can do deadlock debugging, though. In my case turning > > on > > > INVARIANTS and WITNESS leads to unacceptable performance penalty due > > to heavily > > > loaded server. So I can only describe my case, actions and result > > without > > > providing any debug information. > > > > But you can still do *some* things, e.g. backtraces and/or a coredump: > > every little bit helps. > > > > Ultimately, though, you have to understand and accept that the less > > information you provide, the less chance there is that a developer > > will be able to track down your problem. In fact a developer may have > > to effectively ignore your problem report altogether, because of what > > I explained about "symptoms" usually not being enough to tell one bug > > from another. > > > > In general, when you encounter a bug in FreeBSD, you have a little bit > > of work to do on your side before we can start doing the rest. I > > understand that you may not be in a position to do that work, but that > > means you also need to understand that we can't do it either. > > In fact, I solved (or workarounded) this problem for me, so in this thread I > provide my workaround as possible workaround for users that experiences the > same problem. This only hint for them, and not a bugreport for you. I could > not > provide a full (or only partial) debug information because I will not back > out > cvsuped sources, will not replace unionfs with nullfs again and will not wait > week or more for another stuck.
OK. FYI I use nullfs on a few dozen heavily loaded machines without issue for the past year or so, so if you are seeing a nullfs issue it is probably an obscure one. Kris
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