From: Trond Myklebust <trond.myklebust-7I+n7zu2hftEKMMhf/gKZA@public.gmane.org>
To: Ming Chen <mchen-JuQBKiYWLL8cww2/fHdDyodd74u8MsAO@public.gmane.org>
Cc: Linux NFS Mailing List
<linux-nfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Linux FS-devel Mailing List
<linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
ezk-2jbElX+0AsNKU+I/JbwozwkEoixk4Qys@public.gmane.org
Subject: Re: [PATCH] nfs: avoid nfs_wait_on_seqid() for NFSv4.1
Date: Thu, 2 Jul 2015 19:23:27 -0400 [thread overview]
Message-ID: <CAHQdGtSkQmk7_z4ckXvefONjUQu6DVxui_q66RYdq-Tc7D_GKQ@mail.gmail.com> (raw)
In-Reply-To: <1435877253-1497-1-git-send-email-mchen-JuQBKiYWLL8cww2/fHdDyodd74u8MsAO@public.gmane.org>
On Thu, Jul 2, 2015 at 6:47 PM, Ming Chen <mchen-JuQBKiYWLL8cww2/fHdDyodd74u8MsAO@public.gmane.org> wrote:
>
> seqid, introduced in NFSv4.0, requires state-changing operations be performed
> synchronously, and thus limits parallelism. NFSv4.1 supports "unlimited
> parallelism" by using sessions and slots; seqid is no longer used and must be
> ignored by NFSv4.1 server. However, the current nfs client always call
> nfs_wait_on_seqid() no matter the version is 4.0 or 4.1.
Please see commit 63f5f796af613 ("NFSv4.1: Allow parallel
OPEN/OPEN_DOWNGRADE/CLOSE") which first appeared in Linux-4.0.
Cheers
Trond
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WARNING: multiple messages have this Message-ID (diff)
From: Trond Myklebust <trond.myklebust@primarydata.com>
To: Ming Chen <mchen@cs.stonybrook.edu>
Cc: Linux NFS Mailing List <linux-nfs@vger.kernel.org>,
Linux FS-devel Mailing List <linux-fsdevel@vger.kernel.org>,
ezk@fsl.cs.stonybrook.edu
Subject: Re: [PATCH] nfs: avoid nfs_wait_on_seqid() for NFSv4.1
Date: Thu, 2 Jul 2015 19:23:27 -0400 [thread overview]
Message-ID: <CAHQdGtSkQmk7_z4ckXvefONjUQu6DVxui_q66RYdq-Tc7D_GKQ@mail.gmail.com> (raw)
In-Reply-To: <1435877253-1497-1-git-send-email-mchen@cs.stonybrook.edu>
On Thu, Jul 2, 2015 at 6:47 PM, Ming Chen <mchen@cs.stonybrook.edu> wrote:
>
> seqid, introduced in NFSv4.0, requires state-changing operations be performed
> synchronously, and thus limits parallelism. NFSv4.1 supports "unlimited
> parallelism" by using sessions and slots; seqid is no longer used and must be
> ignored by NFSv4.1 server. However, the current nfs client always call
> nfs_wait_on_seqid() no matter the version is 4.0 or 4.1.
Please see commit 63f5f796af613 ("NFSv4.1: Allow parallel
OPEN/OPEN_DOWNGRADE/CLOSE") which first appeared in Linux-4.0.
Cheers
Trond
next prev parent reply other threads:[~2015-07-02 23:23 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-02 22:47 [PATCH] nfs: avoid nfs_wait_on_seqid() for NFSv4.1 Ming Chen
[not found] ` <1435877253-1497-1-git-send-email-mchen-JuQBKiYWLL8cww2/fHdDyodd74u8MsAO@public.gmane.org>
2015-07-02 23:23 ` Trond Myklebust [this message]
2015-07-02 23:23 ` Trond Myklebust
2015-07-03 21:10 ` Ming Chen
-- strict thread matches above, loose matches on Subject: below --
2014-11-03 16:39 Ming Chen
2014-11-03 16:39 ` Ming Chen
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