Peter Wemm wrote: > No. It gives the ability for a thread to block on a syscall without > stalling the entire system. Just try using mysqld on a system using libc_r > and heavy disk IO. You can't select() on a read() from disk. Thats the > ultimate reason to do it. The SMP parallelism is a bonus.
Bug in FreeBSD's NBIO implementation. A read() that would result in page-in needs to queue the request, but return EAGAIN to user space to indicate the request cannot be satisfied. Making select() come true for disk I/O after the fault is satisfied is a seperate issue. Probably need to pass the fd all the way down. -- Terry _______________________________________________ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "[EMAIL PROTECTED]"
