From: Trond Myklebust Subject: Re: [PATCH 2/3] NFS: Add NFS_MOUNT_NONEGDE flag to avoid caching negative dentries Date: Tue, 15 Jan 2008 12:14:23 -0500 Message-ID: <1200417263.8937.8.camel@heimdal.trondhjem.org> References: <20080115163013.GC18911@newbie.thebellsplace.net> <1200415972.7702.7.camel@heimdal.trondhjem.org> Mime-Version: 1.0 Content-Type: text/plain Cc: Bob Bell , NFS list To: Chuck Lever Return-path: Received: from pat.uio.no ([129.240.10.15]:40747 "EHLO pat.uio.no" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751140AbYAORO2 (ORCPT ); Tue, 15 Jan 2008 12:14:28 -0500 In-Reply-To: Sender: linux-nfs-owner@vger.kernel.org List-ID: On Tue, 2008-01-15 at 12:04 -0500, Chuck Lever wrote: > > I suspect system administrators have no idea what a "negative dentry" > is, and it would probably be beyond the scope of nfs(5) to explain > it. So I vote for something that describes the behavior as observed > by a "lay person" rather than something that names the kernel > mechanisms involved. The concept of a 'dentry' is in any case very Linux-specific. The more generic term would be a 'negative lookup'. That said, if someone can find a better name, I'd be all for it. > You might consider tying this behavior to "noac" as well. In other > words, make "noac" equivalent to "sync,actimeo=0,nonegde" . I'd be open for that idea, however that should definitely be a separate patch. Cheers Trond