On Sep 14, 2012, at 1:38 PM, Myklebust, Trond wrote: > On Fri, 2012-09-14 at 13:01 -0400, Chuck Lever wrote: >> What happens if statd is restarted? > > Nothing unusual. Why? The NSM upcall transport is a potential application for TCP + softconn, now that a persistent rpc_clnt is used. It just depends on what failure mode we'd like to optimize for. > >> Sent from my iPhone >> >> On Sep 14, 2012, at 10:25 AM, Stanislav Kinsbursky <skinsbursky@xxxxxxxxxxxxx> wrote: >> >>> This is a bug fix for https://bugzilla.redhat.com/show_bug.cgi?id=830862. >>> >>> The problem is that with NFSv4 mount in container (with separated mount >>> namesapce) and active lock on it, dying child reaped of this container will >>> try to umount NFS and doing this will try to create RPC client to send >>> unmonitor request to statd. >>> But creation of RCP client requires valid current->nsproxy (for operation with >>> utsname()) and during umount on child reaper exit it's equal to zero. >>> >>> Proposed solution is to introduce refrence-counter per-net NSM client, which >>> is created on fist monitor call and destroyed after the lst monitor call. >>> >>> The following series implements... >>> >>> --- >>> >>> Stanislav Kinsbursky (3): >>> lockd: use rpc client's cl_nodename for id encoding >>> lockd: per-net NSM client creation and destruction helpers introduced >>> lockd: create and use per-net NSM RPC clients on MON/UNMON requests >>> >>> >>> fs/lockd/mon.c | 91 +++++++++++++++++++++++++++++++++++++++++++----------- >>> fs/lockd/netns.h | 4 ++ >>> fs/lockd/svc.c | 1 + >>> 3 files changed, 77 insertions(+), 19 deletions(-) >>> >>> >>> -- >>> 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 > > -- > Trond Myklebust > Linux NFS client maintainer > > NetApp > Trond.Myklebust@xxxxxxxxxx > www.netapp.com -- Chuck Lever chuck[dot]lever[at]oracle[dot]com -- 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
