Hello, On Thu, 2022-11-24 at 15:02 -0800, Eric Biggers wrote: [...] > The behavior after this patch is that the resources aren't freed until the epoll > file *and* all files that were added to it have been closed. > > Is that okay? [...] > But probably some users do things the other way around. I.e., they have a > long-lived file descriptor that is repeatedly polled using different epoll > instances that have a shorter lifetime. > > In that case, the number of 'struct eventpoll' and 'struct epitem' in kernel > memory will keep growing until 'max_user_watches' is hit, at which point > EPOLL_CTL_ADD will start failing with ENOSPC. > > Are you sure that is fine? I have a new version of this patch which hopefully should address both concerns. I'll share it soon. Thanks! Paolo
