netdev - Re: [PATCH net-next nfs 0/6] Converting pernet

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Message-ID: <20180315142452.GA17336@fieldses.org>
Date:   Thu, 15 Mar 2018 10:24:52 -0400
From:   "J. Bruce Fields" <bfields@...ldses.org>
To:     Kirill Tkhai <ktkhai@...tuozzo.com>
Cc:     davem@...emloft.net, trond.myklebust@...marydata.com,
        anna.schumaker@...app.com, jlayton@...nel.org, dhowells@...hat.com,
        keescook@...omium.org, dwindsor@...il.com, ishkamiel@...il.com,
        elena.reshetova@...el.com, linux-nfs@...r.kernel.org,
        linux-afs@...ts.infradead.org, netdev@...r.kernel.org
Subject: Re: [PATCH net-next nfs 0/6] Converting pernet_operations (part #7)

On Thu, Mar 15, 2018 at 04:32:30PM +0300, Kirill Tkhai wrote:
> Trond, Anna, Bruce, Jeff, David and other NFS and RXRPC people,
> could you please provide your vision on this patches?

Whoops, sorry, I haven't been paying attention.  Do you have a pointer
to documentation?  I'm unclear what the actual concurrency change
is--sounds like it becomes possible that e.g. multiple ->init methods
(from the same pernet_operations but for different namespaces) could run
in parallel?

Sounds likely to be safe, and I don't actually care too much who merges
them as they look very unlikely to conflict with anything pending.  But
unless anyone tells me otherwise I'll take the one nfsd_net_ops patch
and leave the rest to Anna or Trond.

--b.


> 
> Thanks,
> Kirill
> 
> On 13.03.2018 13:49, Kirill Tkhai wrote:
> > Hi,
> > 
> > this series continues to review and to convert pernet_operations
> > to make them possible to be executed in parallel for several
> > net namespaces in the same time. There are nfs pernet_operations
> > in this series. All of them look similar each other, they mostly
> > create and destroy caches with small exceptions.
> > 
> > Also, there is rxrpc_net_ops, which is used in AFS.
> > 
> > Thanks,
> > Kirill
> > ---
> > 
> > Kirill Tkhai (6):
> >       net: Convert rpcsec_gss_net_ops
> >       net: Convert sunrpc_net_ops
> >       net: Convert nfsd_net_ops
> >       net: Convert nfs4_dns_resolver_ops
> >       net: Convert nfs4blocklayout_net_ops
> >       net: Convert rxrpc_net_ops
> > 
> > 
> >  fs/nfs/blocklayout/rpc_pipefs.c |    1 +
> >  fs/nfs/dns_resolve.c            |    1 +
> >  fs/nfsd/nfsctl.c                |    1 +
> >  net/rxrpc/net_ns.c              |    1 +
> >  net/sunrpc/auth_gss/auth_gss.c  |    1 +
> >  net/sunrpc/sunrpc_syms.c        |    1 +
> >  6 files changed, 6 insertions(+)
> > 
> > --
> > Signed-off-by: Kirill Tkhai <ktkhai@...tuozzo.com>
> >