On Mar 6, 2014, at 13:48, Jim Rees <rees@xxxxxxxxx> wrote: > Andrew Martin wrote: > >> From: "Jim Rees" <rees@xxxxxxxxx> >> Why would a bunch of blocked apaches cause high load and reboot? > What I believe happens is the apache child processes go to serve > these requests and then block in uninterruptable sleep. Thus, there > are fewer and fewer child processes to handle new incoming requests. > Eventually, apache would normally kill said children (e.g after a > child handles a certain number of requests), but it cannot kill them > because they are in uninterruptable sleep. As more and more incoming > requests are queued (and fewer and fewer child processes are available > to serve the requests), the load climbs. > > But Neil says the sleeps should be interruptible, despite what the man page > says. > > Trond, as far as you know, should a soft mount be interruptible by SIGINT, > or should it require a SIGKILL? The ‘TASK_KILLABLE’ state is interruptible by any _fatal_ signal. So if the application uses sigaction() to install a handler for SIGINT, then the RPC call will no longer be interruptible by SIGINT. _________________________________ Trond Myklebust Linux NFS client maintainer, PrimaryData trond.myklebust@xxxxxxxxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
