From: Chuck Lever <chuck.lever@oracle.com>
To: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: linux-nfs@vger.kernel.org
Subject: Re: [PATCH 2/2] NFS: Don't generate a GETATTR when opening an O_DIRECT file
Date: Thu, 11 Feb 2010 14:20:18 -0500 [thread overview]
Message-ID: <4B745872.7020807@oracle.com> (raw)
In-Reply-To: <1265915652.478.22.camel@localhost>
On 02/11/2010 02:14 PM, Trond Myklebust wrote:
> On Thu, 2010-02-11 at 14:09 -0500, Chuck Lever wrote:
>> Close-to-open isn't needed for O_DIRECT files, since their data is
>> never cached. So if their attribute cache hasn't expired, skip the
>> GETATTR.
>
> Don't we still want to ensure that the access cache is still valid?
Would it be reasonable/feasible to squelch the GETATTR but force an
ACCESS call from nfs_permission?
--
chuck[dot]lever[at]oracle[dot]com
next prev parent reply other threads:[~2010-02-11 19:21 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-11 19:08 [PATCH 0/2] Reduce GETATTRs during direct I/O Chuck Lever
[not found] ` <20100211185757.2666.90001.stgit-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org>
2010-02-11 19:09 ` [PATCH 1/2] NFS: Too many GETATTR and ACCESS calls after " Chuck Lever
2010-02-11 19:09 ` [PATCH 2/2] NFS: Don't generate a GETATTR when opening an O_DIRECT file Chuck Lever
[not found] ` <20100211190918.2666.82008.stgit-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org>
2010-02-11 19:13 ` Chuck Lever
2010-02-11 19:14 ` Trond Myklebust
2010-02-11 19:20 ` Chuck Lever [this message]
2010-02-11 19:34 ` Trond Myklebust
2010-02-11 19:41 ` Chuck Lever
2010-02-11 19:45 ` Trond Myklebust
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