On Fri, 2014-05-09 at 08:47 -0700, Kyle Terrien wrote: > I was using an old hpHosts /etc/hosts file (to block ads). I reverted it > to the stock /etc/hosts file in the package filesystem, and ntp-4.2.7 > runs without thrashing. > > I'm re-enabling Adblock Plus for now--until I get around to creating an > updated hosts table. I'm using the ad-blocking hosts file from http://someonewhocares.org/hosts/zero/ though I replace 0.0.0.0 with 0.0.0.1 so that connect() returns EINVAL instead of connecting to localhost. However, that file is under 300KB, while the hpHosts file is currently over 16MB. From looking at output from $ ltrace -S telnet telnet> open telnet.google.com Server lookup failure: telnet.google.com:telnet, Name or service not known telnet> open telnet.apple.com Server lookup failure: telnet.apple.com:telnet, Name or service not known telnet> it appears that getaddrinfo() rescans /etc/hosts in full for each lookup. That's not obviously related to the problem you're having with ntpd, but it does seem that huge ad-blocking host files are horribly inefficient. Does anyone know a way to load them into database of some sort, perhaps a NIS database that could be referenced in /etc/host.conf, e.g. order hosts,nis,bind Carl
