Received-SPF: pass (google.com: best guess record for domain of linux-nfs-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
MIME-Version: 1.0
References: <CAN-5tyF2AL8Bx5QS3HGYzzvjw5vnkfmFxWEmqe_BWfvWCVtDFg@mail.gmail.com>
 <1d019c416f69aa7f3ba7fed3bcfd4c08088fba57.camel@hammerspace.com>
In-Reply-To: <1d019c416f69aa7f3ba7fed3bcfd4c08088fba57.camel@hammerspace.com>
From:   Olga Kornievskaia <aglo@umich.edu>
Date:   Thu, 11 Jul 2019 16:33:57 -0400
Message-ID: <CAN-5tyG0jdyn8C11v6b8=v3d1p=WoMAhXrAw8mWGEUn-TVXJ=g@mail.gmail.com>
Subject: Re: multipath patches
To:     Trond Myklebust <trondmy@hammerspace.com>
Cc:     "neilb@suse.com" <neilb@suse.com>,
        "linux-nfs@vger.kernel.org" <linux-nfs@vger.kernel.org>
Content-Type: text/plain; charset="UTF-8"
Sender: linux-nfs-owner@vger.kernel.org
Precedence: bulk

On Thu, Jul 11, 2019 at 3:29 PM Trond Myklebust <trondmy@hammerspace.com> wrote:
>
> On Thu, 2019-07-11 at 15:06 -0400, Olga Kornievskaia wrote:
> > Hi Trond,
> >
> > I see that you have nconnect patches in your testing branch (as well
> > as your linux-next and I assume they are the same).  There is
> > something wrong with that version. A mount hangs the machine.
> >
> > [  132.143379] watchdog: BUG: soft lockup - CPU#0 stuck for 23s!
> > [mount.nfs:2624]
> >
> > I don't have such problems with the patch series that Neil has
> > posted.
> >
> > Thank you.
>
> How are the patchsets different? As far as I know, all I did was apply
> the 3 patches that Neil added to my existing branch.

I'm not sure. I had a problem with your "multipath" branch before and
I recall what I did is went back and redownloaded your posted patches.
That was when I was testing performance. So if you haven't touched
that branch and just used it I think it's the same problem.

In the current testing branch I don't see several patches that Neil
has added (posted) to the mailing list. So I'm not sure what you mean
you added 3 of his patches on top of yours. At most I can say maybe
you added 2 of his (one that allows for v2 and v3 and another that
does state operations on a single connection. There are no patches for
sunrpc stats that were posted).

What I know is that if I revert your branch to
bf11fbdb20b385157b046ea7781f04d0c62554a3 before patches and apply
Neils patches. All is fine. I really don't want to debug a non-working
version when there is one that works.


>
> --
> Trond Myklebust
> Linux NFS client maintainer, Hammerspace
> trond.myklebust@hammerspace.com
>
>