From: "Ilpo Järvinen" <[EMAIL PROTECTED]> Date: Fri, 4 Aug 2006 18:44:20 +0300 (EEST)
> Overflow can occur very easily with 32 bits, e.g., with 1 second > us_idle is approx. 2^20, which leaves only 11-Wlog bits for queue > length. Since the EWMA exponent is typically around 9, queue > lengths larger than 2^2 cause overflow. Whether the affected > branch is taken when us_idle is as high as 1 second, depends on > Scell_log, but with rather reasonable configuration Scell_log is > large enough to cause p->Stab to have zero index, which always > results zero shift (typically also few other small indices result > in zero shift). > > Signed-off-by: Ilpo Järvinen <[EMAIL PROTECTED]> Applied, thanks. - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
