[PATCH 0/3] fixes for overflow in poll(), epoll(), and msec_to_jiffies()

Willy Tarreau
2005-09-24T19:41:29Z

Hello,

After the discussion around epoll() timeout, I noticed that the functions used
to detect the timeout could themselves overflow for some values of HZ.

So I decided to fix them by defining a macro which represents the maximal
acceptable argument which is guaranteed not to overflow. As an added bonus,
those functions can now be used in poll() and ep_poll() and remove the divide
if HZ == 1000, or replace it with a shift if (1000 % HZ) or (HZ % 1000) is a
power of two.

Patches against 2.6.14-rc2-mm1 sent as replies to this mail.

Regards,
Willy