On 2006/03/21 23:21, Jan Engelhardt wrote: > >>I have found out that when linking a userspace application with -lpthread, > >>then for some reason, a device driver's read() routine suddenly has > >>IO_NDELAY set in flags. Bug? > > > >No. This is as it should be, because -lpthread does threads in *one* > >kernel process, so it has to intercept blocking operations so it can > >switch to another thread instead, or call select/poll/kevent if needed, > >so not all threads hang if *one* executes a blocking operation. > > > Reminds me of ol' LinuxThreads. Any plans to make each thread a separate > kernel process/thread?
http://www.openbsd.org/papers/eurobsd2005/tedu-rthreads.pdf
