Re: {sys_,/dev/}epoll waiting timeout

From: Mark Mielke (mark@mark.mielke.cc)
Date: Thu Jan 23 2003 - 15:40:56 EST

On Thu, Jan 23, 2003 at 06:28:31PM +0000, Jamie Lokier wrote:
> Mark Mielke wrote:
> > Or, fix sys_poll(). With the +1, this means that sys_poll() would have
> > a 1 in 1001 chance per second of returning one jiffie too early.
> Nope. Read the expression again.

Sorry... not 1 in 1001... almost 100% chance of returning of one
jiffie too many. In practice, even on a relatively idle system,
the process will not be able to wake up as frequently as it might
be able to expect.

mark 

-- 
mark@mielke.cc/markm@ncf.ca/markm@nortelnetworks.com __________________________
.  .  _  ._  . .   .__    .  . ._. .__ .   . . .__  | Neighbourhood Coder
|\/| |_| |_| |/    |_     |\/|  |  |_  |   |/  |_   | 
|  | | | | \ | \   |__ .  |  | .|. |__ |__ | \ |__  | Ottawa, Ontario, Canada

  One ring to rule them all, one ring to find them, one ring to bring them all
                       and in the darkness bind them...

                           http://mark.mielke.cc/

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

This archive was generated by hypermail 2b29 : Thu Jan 23 2003 - 22:00:32 EST