Re: [PATCH 00/19] Layoutget on OPEN

From: Olga Kornievskaia <aglo@umich.edu>
To: Trond Myklebust <trondmy@hammerspace.com>
Cc: "linux-nfs@vger.kernel.org" <linux-nfs@vger.kernel.org>
Subject: Re: [PATCH 00/19] Layoutget on OPEN
Date: Wed, 30 May 2018 14:37:45 -0400	[thread overview]
Message-ID: <CAN-5tyF8J9tBwLTRLEc=f1LJ4PGoY9cxJsKX4dD330z8Vs8PJg@mail.gmail.com> (raw)
In-Reply-To: <8cf44605f0635b591e097594167289160e0e0d8b.camel@hammerspace.com>

Awesome thanks.

On Wed, May 30, 2018 at 2:36 PM, Trond Myklebust
<trondmy@hammerspace.com> wrote:
> On Wed, 2018-05-30 at 14:25 -0400, Olga Kornievskaia wrote:
>> Hi Trond,
>>
>> Do you by any chance have this patch set somewhere in your git
>> branches? I'd like to test this against NetApp.
>>
>> Thank you.
>>
>
> I've just pushed it out to my testing branch on git.linux-nfs.org.
>
>> On Wed, May 30, 2018 at 2:05 PM, Trond Myklebust <trondmy@gmail.com>
>> wrote:
>> > This patchset is something we've been sitting on for a couple of
>> > years
>> > in order to allow it to mature. It was mainly developed by Fred
>> > Isaman
>> > while he was working for Primary Data, but we've had a few bugfixes
>> > come in since then.
>> > The main reason for delaying the upstream merge was to ensure that
>> > adding layoutget to the OPEN compound was safe (does not cause
>> > existing
>> > layouts to be automatically revoked) and that it gives us a real
>> > performance benefit.
>> >
>> > Fred Isaman (14):
>> >   pnfs: Remove redundant assignment from nfs4_proc_layoutget().
>> >   pnfs: Store return value of decode_layoutget for later processing
>> >   NFS4: move ctx into nfs4_run_open_task
>> >   pnfs: Add layout driver flag PNFS_LAYOUTGET_ON_OPEN
>> >   pnfs: refactor send_layoutget
>> >   pnfs: move allocations out of nfs4_proc_layoutget
>> >   pnfs: Add conditional encode/decode of LAYOUTGET within OPEN
>> > compound
>> >   pnfs: Move nfs4_opendata into nfs4_fs.h
>> >   pnfs: Change pnfs_alloc_init_layoutget_args call signature
>> >   pnfs: Add LAYOUTGET to OPEN of a new file
>> >   pnfs: Add LAYOUTGET to OPEN of an existing file
>> >   pnfs: Stop attempting LAYOUTGET on OPEN on failure
>> >   pnfs: Add barrier to prevent lgopen using LAYOUTGET during recall
>> >   pnfs: Fix manipulation of NFS_LAYOUT_FIRST_LAYOUTGET
>> >
>> > Trond Myklebust (5):
>> >   NFSv4/pnfs: Ensure pnfs_parse_lgopen() won't try to parse
>> >     uninitialised data
>> >   NFSv4/pnfs: Don't switch off layoutget-on-open for transient
>> > errors
>> >   pNFS: Don't send LAYOUTGET on OPEN for read, if we already have
>> > cached
>> >     data
>> >   pnfs: Don't call commit on failed layoutget-on-open
>> >   pnfs: Don't release the sequence slot until we've processed
>> > layoutget
>> >     on open
>> >
>> >  fs/nfs/callback_proc.c                 |   2 +
>> >  fs/nfs/flexfilelayout/flexfilelayout.c |   1 +
>> >  fs/nfs/nfs4_fs.h                       |  25 +++
>> >  fs/nfs/nfs4proc.c                      |  97 +++++----
>> >  fs/nfs/nfs4state.c                     |   8 +
>> >  fs/nfs/nfs4xdr.c                       |  65 +++++-
>> >  fs/nfs/pnfs.c                          | 266
>> > +++++++++++++++++++++----
>> >  fs/nfs/pnfs.h                          |  28 ++-
>> >  include/linux/nfs_fs_sb.h              |   2 +
>> >  include/linux/nfs_xdr.h                |   4 +
>> >  10 files changed, 398 insertions(+), 100 deletions(-)
>> >
>> > --
>> > 2.17.0
>> >
>> > --
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> --
> Trond Myklebust
> Linux NFS client maintainer, Hammerspace
> trond.myklebust@hammerspace.com
>