Re: Seg fault: Possible race conditions in mod_mem_cache.c

[Jean-Jacques Clar]

>>> [EMAIL PROTECTED] 09/09/04 2:27 AM >>> >>As far as performance, I currently don't see any slow down on my >>box, but will run longer tests tomorrow morning. >no worries about that here Looking more closely at the implication of the submitted patch, I don't think we want to lock decrement_refcount() with a global mutex affecting the whole cache. Yes, it fixes the double free, but it is kind of ugly and increases mutex contention drastically, at least on my 4 procs NetWare box. The tests I did using SLES9 shows no slow down using the new code, but the story is different on NetWare when running with more than 500 threads. I am trying to find a solution using the current atomic APIs, but have not been succesfull so far. If someone has a better idea, I am more than open to try it. Thanks, JJ