mirror of
https://git.notmuchmail.org/git/notmuch
synced 2024-11-30 22:54:11 +01:00
91 lines
4.6 KiB
Text
91 lines
4.6 KiB
Text
|
From: Jeff Layton <jlayton-eUNUBHrolfbYtjvyW6yDsg@public.gmane.org>
|
||
|
|
Subject: Re: [RFC][PATCH 06/10] cifs: define inode-level cache object and
|
||
|
|
register them
|
||
|
|
Date: Fri, 25 Jun 2010 12:53:06 -0400
|
||
|
|
Lines: 36
|
||
|
|
Message-ID: <20100625125306.7f9b1966@tlielax.poochiereds.net>
|
||
|
|
References: <4C24A606.5040001@suse.de>
|
||
|
|
<1277220214-3597-1-git-send-email-sjayaraman@suse.de>
|
||
|
|
<yes>
|
||
|
|
<9822.1277312573@redhat.com>
|
||
|
|
<22697.1277470549@redhat.com>
|
||
|
|
Mime-Version: 1.0
|
||
|
|
Content-Type: text/plain; charset=US-ASCII
|
||
|
|
Content-Transfer-Encoding: 7bit
|
||
|
|
Cc: Suresh Jayaraman <sjayaraman-l3A5Bk7waGM@public.gmane.org>,
|
||
|
|
Steve French <smfrench-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>, linux-cifs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
|
||
|
|
linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
|
||
|
|
samba-technical-w/Ol4Ecudpl8XjKLYN78aQ@public.gmane.org
|
||
|
|
To: David Howells <dhowells-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
|
||
|
|
X-From: linux-cifs-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Fri Jun 25 18:53:12 2010
|
||
|
|
Return-path: <linux-cifs-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
|
||
|
|
Envelope-to: glkc-linux-cifs-1dZseelyfdZg9hUCZPvPmw@public.gmane.org
|
||
|
|
Received: from vger.kernel.org ([209.132.180.67])
|
||
|
|
by lo.gmane.org with esmtp (Exim 4.69)
|
||
|
|
(envelope-from <linux-cifs-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>)
|
||
|
|
id 1OSC9P-0005Eb-SU
|
||
|
|
for glkc-linux-cifs-1dZseelyfdZg9hUCZPvPmw@public.gmane.org; Fri, 25 Jun 2010 18:53:12 +0200
|
||
|
|
Received: (majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org) by vger.kernel.org via listexpand
|
||
|
|
id S932199Ab0FYQxK (ORCPT <rfc822;glkc-linux-cifs@m.gmane.org>);
|
||
|
|
Fri, 25 Jun 2010 12:53:10 -0400
|
||
|
|
Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.122]:53512 "EHLO
|
||
|
|
cdptpa-omtalb.mail.rr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
|
||
|
|
with ESMTP id S932187Ab0FYQxJ (ORCPT
|
||
|
|
<rfc822;linux-cifs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>); Fri, 25 Jun 2010 12:53:09 -0400
|
||
|
|
X-Authority-Analysis: v=1.0 c=1 a=iVNVO0OCT3kA:10 a=yQWWgrYGNuUA:10 a=kj9zAlcOel0A:10 a=20KFwNOVAAAA:8 a=hGzw-44bAAAA:8 a=f0L6POiToRdS6aViIA4A:9 a=tdNtT7bw1iHNm6ggrCkIte35EhAA:4 a=CjuIK1q_8ugA:10 a=jEp0ucaQiEUA:10 a=0kPLrQdw3YYA:10 a=dowx1zmaLagA:10 a=00U40p1LBqVLw4jT:21 a=gh7LVOPznGai4vo_:21
|
||
|
|
X-Cloudmark-Score: 0
|
||
|
|
X-Originating-IP: 71.70.153.3
|
||
|
|
Received: from [71.70.153.3] ([71.70.153.3:42266] helo=mail.poochiereds.net)
|
||
|
|
by cdptpa-oedge01.mail.rr.com (envelope-from <jlayton-eUNUBHrolfbYtjvyW6yDsg@public.gmane.org>)
|
||
|
|
(ecelerity 2.2.2.39 r()) with ESMTP
|
||
|
|
id 2D/E0-24471-3FED42C4; Fri, 25 Jun 2010 16:53:08 +0000
|
||
|
|
Received: from tlielax.poochiereds.net (tlielax.poochiereds.net [192.168.1.3])
|
||
|
|
by mail.poochiereds.net (Postfix) with ESMTPS id E9B19580FA;
|
||
|
|
Fri, 25 Jun 2010 12:53:06 -0400 (EDT)
|
||
|
|
In-Reply-To: <22697.1277470549-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
|
||
|
|
X-Mailer: Claws Mail 3.7.6 (GTK+ 2.20.1; x86_64-redhat-linux-gnu)
|
||
|
|
Sender: linux-cifs-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
|
||
|
|
Precedence: bulk
|
||
|
|
List-ID: <linux-cifs.vger.kernel.org>
|
||
|
|
X-Mailing-List: linux-cifs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
|
||
|
|
Archived-At: <http://permalink.gmane.org/gmane.linux.kernel/1003033>
|
||
|
|
|
||
|
|
On Fri, 25 Jun 2010 13:55:49 +0100
|
||
|
|
David Howells <dhowells-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> wrote:
|
||
|
|
|
||
|
|
> Suresh Jayaraman <sjayaraman-l3A5Bk7waGM@public.gmane.org> wrote:
|
||
|
|
>
|
||
|
|
> > I think the creation time is currently being ignored as we won't be able
|
||
|
|
> > to accomodate in POSIX stat struct.
|
||
|
|
>
|
||
|
|
> The FS-Cache interface doesn't use the POSIX stat struct, but it could be
|
||
|
|
> really useful to save it and use it for cache coherency inside the kernel.
|
||
|
|
>
|
||
|
|
> Out of interest, what does Samba do when it comes to generating a creation time
|
||
|
|
> for UNIX where one does not exist?
|
||
|
|
>
|
||
|
|
|
||
|
|
(cc'ing samba-technical since we're talking about the create time)
|
||
|
|
|
||
|
|
Looks like it mostly uses the ctime. IMO, the mtime would be a better
|
||
|
|
choice since it changes less frequently, but I don't guess that it
|
||
|
|
matters very much.
|
||
|
|
|
||
|
|
I have a few patches that make the cifs_iget code do more stringent
|
||
|
|
checks. One of those makes it use the create time like an i_generation
|
||
|
|
field to guard against matching inodes that have the same number but
|
||
|
|
that have undergone a delete/create cycle. They need a bit more testing
|
||
|
|
but I'm planning to post them in time for 2.6.36.
|
||
|
|
|
||
|
|
Because of how samba generates this number, it could be somewhat
|
||
|
|
problematic to do this. What may save us though is that Linux<->Samba
|
||
|
|
mostly uses unix extensions unless someone has specifically disabled
|
||
|
|
them on either end. The unix extension calls don't generally send any
|
||
|
|
sort of create time field, so we can't rely on it in those codepaths
|
||
|
|
anyway.
|
||
|
|
|
||
|
|
--
|
||
|
|
Jeff Layton <jlayton-eUNUBHrolfbYtjvyW6yDsg@public.gmane.org>
|
||
|
|
|
||
|
|
|