Hello, On Fri, Feb 17, 2017 at 12:37:11PM +0100, Krzysztof Opasiak wrote: > > We need to limit and monitor the number of file descriptors processes > > keep open. If a process exceeds certain limit we'd like to terminate it > > and restart it or reboot the whole system. Currently the RLIMIT API > > allows limiting the number of file descriptors but to achieve our goals > > we'd need to make sure all programmes we run handle EMFILE errno > > properly. That is why we consider developing a cgroup controller that > > limits the number of open file descriptors of its members (similar to > > memory controler). > > > > Any comments? Is there any alternative that: > > > > + does not require modifications of user-land code, > > + enables other process (e.g. init) to be notified and apply policy.
Hmm... I'm not quite sure fds qualify as an independent system-wide resource. We did that for pids because pids are globally limited and can run out way earlier than memory backing it. I don't think we have similar restructions for fds, do we? Thanks. -- tejun
