On Monday, 23 July 2007 21:52, Manfred Spraul wrote: > Rafael wrote: > > On Monday, 23 July 2007 20:38, Agarwal, Lomesh wrote: > > > The other problem I am facing that read from socket returns with ENODATA > > > when resuming. any ideas? > > > > It's of similar kind: the system call checks signal_pending(current) and > > exit > > with an error if that's true. > > > > Well, I'm afraid we can't place try_to_freeze() in every system call that > > does something like that ... > > > I don't understand why the poll() system call returns to user space. > poll() uses ERESTARTNOHAND, thus it should not return to user space. > Any ideas why ERESTARTNOHAND doesn't work?
Well, look at the code in fs/select.c:do_poll() . If signal_pending(current) is true, the main loop breaks and count is returned to do_sys_poll(). If zero is returned and signal_pending(current) is still true, do_sys_poll() returns -EINTR. Greetings, Rafael -- "Premature optimization is the root of all evil." - Donald Knuth - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/