On Tue, Sep 23, 2014 at 02:59:38PM +0100, Will Deacon wrote: > On Tue, Sep 23, 2014 at 02:33:06PM +0100, Weston Andros Adamson wrote: > > Any more info on how to reproduce this would be really great. Unfortunately I don’t > > have access to an arm64 system. > > I've not spotted a pattern other than using 64k pages, yet. If I manage to > get a reproducer, I'll let you know. > > > If it’s possible, could we get a packet trace around when this happens? This is pure > > speculation, but this might have something to do the resend path - a commit fails > > and all the requests on the commit list have to be resent. > > Sure, once I can reproduce it reliably, then I'll try to do that. Right, a bunch of DDing from /dev/zero over an ssh session triggers this very quickly. I've put a binary tcpdump here: http://www.willdeacon.ukfsn.org/bitbucket/oopsen/nfs/tcpdump.bin You may want to filter out the ssh packets. The only `interesting' thing to me is a retransmission about half way through, but I don't know what I'm looking for. The NFS server is 10.1.203.204 and the client is 10.1.203.24. Will -- 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
