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From: Greg Banks <gnb@melbourne.sgi.com>
To: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: Charles Lever <Charles.Lever@netapp.com>, nfs@lists.sourceforge.net
Subject: Re: [PATCH] 1/3 - RPC metrics support
Date: Fri, 02 Apr 2004 12:42:32 +1000	[thread overview]
Message-ID: <406CD318.F48841F3@melbourne.sgi.com> (raw)
In-Reply-To: 1080870078.10521.53.camel@lade.trondhjem.org

Trond Myklebust wrote:
> 
> On Thu, 2004-04-01 at 19:49, Greg Banks wrote:
> 
> > Why not just save a copy of @devname in nfs_get_sb() ? 
> 
> That is very different. That we can do...
> 
> Please don't confuse the export path and the device name. nfss->mnt_path
> is the former: 

> The device name OTOH is just whatever label the caller of sys_mount()
> feels like passing down to the kernel. It will usually contain the name
> of the server and the export path ('cos that's what the nfs-utils
> "mount" does), but it does not have to, and we currently do not depend
> on it taking any particular value.

If all we care about is identifying the sb for purposes of iostat and
post-mortem debugging (I for one would find this useful), the precise
semantics placed on the string by the mount program don't matter that
much.  You could add a `devname' field to nfs_server and document
that it doesn't mean anything at all.  Alternatively you could check
that the first part matches (modulo domain names) the `hostname' field
and is followed by a ':' and a path, and if all that matches, save the
path.

Greg.
-- 
Greg Banks, R&D Software Engineer, SGI Australian Software Group.
I don't speak for SGI.


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  reply	other threads:[~2004-04-02  2:42 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-04-01 17:05 [PATCH] 1/3 - RPC metrics support Lever, Charles
2004-04-02  0:17 ` Greg Banks
2004-04-02  0:36 ` Trond Myklebust
2004-04-02  0:49   ` Greg Banks
2004-04-02  1:41     ` Trond Myklebust
2004-04-02  2:42       ` Greg Banks [this message]
  -- strict thread matches above, loose matches on Subject: below --
2004-04-04  2:35 Lever, Charles
2004-04-04  6:17 ` Greg Banks
2004-04-01 16:45 Lever, Charles
2004-04-02  0:10 ` Greg Banks
2004-04-01 15:15 Lever, Charles
2004-04-01 23:58 ` Greg Banks
2004-04-02  0:34   ` Trond Myklebust
2004-04-02  2:33     ` Greg Banks
2004-03-31 16:57 Lever, Charles
2004-03-31 17:19 ` Trond Myklebust
2004-03-31 16:34 Lever, Charles
2004-03-31 16:46 ` Trond Myklebust
2004-04-01  8:13 ` Greg Banks

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