From: Steve Dickson <SteveD@redhat.com>
To: "J. Bruce Fields" <bfields@fieldses.org>
Cc: linux-nfs@vger.kernel.org
Subject: Re: V4 unmount causes a GETATTR
Date: Fri, 15 Feb 2013 16:45:47 -0500 [thread overview]
Message-ID: <511EAC8B.3050403@RedHat.com> (raw)
In-Reply-To: <20130215182531.GB19923@fieldses.org>
On 15/02/13 13:25, J. Bruce Fields wrote:
> On Fri, Feb 15, 2013 at 10:46:00AM -0500, Steve Dickson wrote:
>> Hello,
>>
>> I have not tracked down as to the exact reason,
>> but it appears umount of v4 file system cause the
>> directory to be revalidating causing the GETATTR.
>>
>> Is this revalidation really necessary on an unmount?
>
> I don't know, maybe not. But even if it's not, there are other things
> (like cleaning up state) that the client will likely try to do on
> unmount. In the presence of delegations it could have dirty data that
> it's required to write back even if applications don't currently hold
> any open files.
Understood with dirty data... but what I as seeing was a v4 mount and
then a reboot with no activity on the mount point...
>
> So I don't think we can promise umount will work without the network.
Again with open files (aka activity on the mount point) I agree but
with no activity or open files, I'm think that GETATTR is simply not
necessary...
steved.
next prev parent reply other threads:[~2013-02-15 21:45 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-15 15:46 V4 unmount causes a GETATTR Steve Dickson
2013-02-15 18:25 ` J. Bruce Fields
2013-02-15 21:45 ` Steve Dickson [this message]
2013-02-16 5:17 ` Myklebust, Trond
2013-02-16 15:11 ` Steve Dickson
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