On Tue, 9 Sep 2014, Andreas Joachim Peters wrote: > Hi, > by chance I had a look to the RWLock class. To my best knowledge the way > you create RW locks it defaults to writer-starvation e.g. all readers > will always jump a head of a pending writer. I cannot imagine that you > never have the opposite requirement in the CEPH multithreaded code but I > didn't review where it is used. In case you are aware, you can just > ignore this comment, otherwise one could add the option to create a > writer-prefering RWLock at construction time using e.g. > pthread_rwlockattr_setkind_np(&attr, PTHREAD_RWLOCK_PREFER_WRITER_NP) Hmm, I was not aware. Perhaps we should make the reader vs writer preference explicit during construction? > Another question: I couldn't find a base implementation to translate > IPV4/6 ip's to host names? Is there same configuration table/method > allowing to get back from an OSD address retrieved via > OSDMap::get_addr() the original host name avoiding the use of DNS > lookups? I don't think we are doing reverse DNS lookups anywhere in the ceph code ... sage -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
