From: bfields@fieldses.org (J. Bruce Fields)
To: hch <hch@lst.de>
Cc: Trond Myklebust <trondmy@primarydata.com>,
"jlayton@poochiereds.net" <jlayton@poochiereds.net>,
"bfields@redhat.com" <bfields@redhat.com>,
"linux-nfs@vger.kernel.org" <linux-nfs@vger.kernel.org>,
"linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>
Subject: Re: [PATCH] nfsd: special case truncates some more
Date: Tue, 24 Jan 2017 11:25:36 -0500 [thread overview]
Message-ID: <20170124162536.GA18025@fieldses.org> (raw)
In-Reply-To: <20170123162607.GA21199@lst.de>
On Mon, Jan 23, 2017 at 05:26:07PM +0100, hch wrote:
> On Mon, Jan 23, 2017 at 04:20:45PM +0000, Trond Myklebust wrote:
> > Note that the POSIX spec seems to have changed recently. The current
> > spec appears to state that we should set the mtime and ctime (and
> > change attribute) on success in open(O_TRUNC), truncate() and
> > ftruncate(). In previous incarnations of the spec, truncate() would
> > only set the time if the size was changed:
>
> Interesting. But in this case historical Posix and thus Linux behavior
> still takes precedence and we're not suddently going to change behavior.
Makes sense as a general rule, but is it really likely that anyone
depends on ctime/mtime not changing on a non-size-changing truncate()?
--b.
next prev parent reply other threads:[~2017-01-24 16:25 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-22 16:54 setattr ATTR_SIZE vs the rest Christoph Hellwig
2017-01-22 16:54 ` [PATCH] nfsd: special case truncates some more Christoph Hellwig
2017-01-23 12:21 ` Jeff Layton
2017-01-23 12:33 ` Christoph Hellwig
2017-01-23 15:36 ` Christoph Hellwig
2017-01-23 15:36 ` Christoph Hellwig
2017-01-23 15:52 ` Jeff Layton
2017-01-23 16:05 ` Christoph Hellwig
2017-01-23 16:14 ` Jeff Layton
2017-01-23 16:20 ` Trond Myklebust
2017-01-23 16:20 ` Trond Myklebust
2017-01-23 16:26 ` hch
2017-01-23 17:25 ` Trond Myklebust
2017-01-23 17:25 ` Trond Myklebust
2017-01-23 17:38 ` hch
2017-01-23 17:42 ` Trond Myklebust
2017-01-23 17:42 ` Trond Myklebust
2017-01-24 16:25 ` J. Bruce Fields [this message]
2017-01-24 22:02 ` J. Bruce Fields
2017-01-23 16:58 ` setattr ATTR_SIZE vs the rest J. Bruce Fields
2017-01-24 7:52 ` Christoph Hellwig
-- strict thread matches above, loose matches on Subject: below --
2017-02-20 6:21 split setattr operations take 2 Christoph Hellwig
2017-02-20 6:21 ` [PATCH] nfsd: special case truncates some more Christoph Hellwig
2017-02-20 22:23 ` J. Bruce Fields
2017-02-21 15:07 ` Chuck Lever
2017-02-21 15:14 ` J. Bruce Fields
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