From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: linux-nfs-owner@vger.kernel.org Received: from verein.lst.de ([213.95.11.211]:34142 "EHLO newverein.lst.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753535AbaIOVLR (ORCPT ); Mon, 15 Sep 2014 17:11:17 -0400 Date: Mon, 15 Sep 2014 23:11:13 +0200 From: Christoph Hellwig To: Daniel Gryniewicz Cc: Benny Halevy , linux-nfs@vger.kernel.org, Boaz Harrosh Subject: Re: layoutcommit space reservation for the objlayout driver Message-ID: <20140915211113.GA30397@lst.de> References: <1538636805.101.1410805338811.JavaMail.root@thunderbeast.private.linuxbox.com> <933718474.103.1410805353074.JavaMail.root@thunderbeast.private.linuxbox.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <933718474.103.1410805353074.JavaMail.root@thunderbeast.private.linuxbox.com> Sender: linux-nfs-owner@vger.kernel.org List-ID: On Mon, Sep 15, 2014 at 02:22:33PM -0400, Daniel Gryniewicz wrote: > This is probably the case, then. The object layout layoutupdate is only 16 bytes long and is fixed size, so it wouldn't take much extra space for it to never hit. Yes, I suspect at the moment we just overallocate the XDR buffer due to slab or nfs implementation details, which are bound to chance as some point without notice.