Le samedi 07 mai 2011 Ã 12:49 +0800, Changli Gao a Ãcrit : > If FD_CLOFORK is 1, when a fork occurs, the corresponding file descriptor > will be closed for the child process. IOW, the file descriptor isn't > inheritable. > > FD_CLOFORK is used as IBM does. Is it part of a standard, and what could be the use for such thing ? Why had we wait 2011 to add it in linux ? > > O_CLOFORK is also added to avoid the additional fcntl(2) after open(2). > > Signed-off-by: Changli Gao <xiaosuo@xxxxxxxxx> Your implementation has some peformance implication. close_on_exec and close_on_fork bit for a given fd would be on separate cache lines. So you add a cost on threaded programs for open()/close() [ Yes, we apparently clear close_on_exec bit in close()... we could let it untouched and make flush_old_files() aware of that ] -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
