From: Trond Myklebust <Trond.Myklebust@netapp.com>
To: Mi Jinlong <mijinlong@cn.fujitsu.com>
Cc: "J. Bruce Fields" <bfields@fieldses.org>, linux-nfs@vger.kernel.org
Subject: Re: [PATCH] NFSV4 :All lock operations should be sent to the server for resolution
Date: Mon, 28 Nov 2011 10:42:13 -0500 [thread overview]
Message-ID: <1322494933.6125.21.camel@lade.trondhjem.org> (raw)
In-Reply-To: <4ED32AAB.8010800@cn.fujitsu.com>
On Mon, 2011-11-28 at 14:31 +0800, Mi Jinlong wrote:
> Hi Trond,
>
> Trond Myklebust:
> > The ability to cache locks is one of the main reasons for holding
> > delegations in the first place. Sure, the spec allows for non-posix
> > locking, but the Linux client doesn't.
>
> Would you mind tell me some about why we not support non-posix locking at NFS ?
For the very obvious reason that Linux applications are coded under the
assumption that the kernel implements POSIX locking semantics. Why would
we want to implement support for NFS features that can cause perfectly
correctly coded applications to hang and crash?
Trond
--
Trond Myklebust
Linux NFS client maintainer
NetApp
Trond.Myklebust@netapp.com
www.netapp.com
prev parent reply other threads:[~2011-11-28 15:42 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-14 6:45 [PATCH] NFSV4 :All lock operations should be sent to the server for resolution Fu Liankun
2011-01-14 18:16 ` J. Bruce Fields
2011-01-14 18:29 ` Trond Myklebust
2011-11-28 6:31 ` Mi Jinlong
2011-11-28 15:42 ` Trond Myklebust [this message]
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