From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Date: Wed, 17 Oct 2018 22:03:34 -0700 From: "Darrick J. Wong" To: Al Viro Cc: david@fromorbit.com, sandeen@redhat.com, linux-nfs@vger.kernel.org, linux-cifs@vger.kernel.org, Amir Goldstein , linux-unionfs@vger.kernel.org, linux-xfs@vger.kernel.org, linux-mm@kvack.org, linux-btrfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, Christoph Hellwig , ocfs2-devel@oss.oracle.com Subject: Re: [PATCH 09/29] vfs: combine the clone and dedupe into a single remap_file_range Message-ID: <20181018050334.GU28243@magnolia> References: <153981625504.5568.2708520119290577378.stgit@magnolia> <153981631706.5568.6473120432728396978.stgit@magnolia> <20181018004826.GB12386@ZenIV.linux.org.uk> <20181018044718.GT28243@magnolia> <20181018045429.GF32577@ZenIV.linux.org.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20181018045429.GF32577@ZenIV.linux.org.uk> Sender: owner-linux-mm@kvack.org List-ID: On Thu, Oct 18, 2018 at 05:54:29AM +0100, Al Viro wrote: > On Wed, Oct 17, 2018 at 09:47:18PM -0700, Darrick J. Wong wrote: > > > > > +#define REMAP_FILE_DEDUP (1 << 0) > > > > + > > > > +/* > > > > + * These flags should be taken care of by the implementation (possibly using > > > > + * vfs helpers) but can be ignored by the implementation. > > > > + */ > > > > +#define REMAP_FILE_ADVISORY (0) > > > > > > ??? > > > > Sorry if this wasn't clear. How about this? > > > > /* > > * These flags signal that the caller is ok with altering various aspects of > > * the behavior of the remap operation. The changes must be made by the > > * implementation; the vfs remap helper functions can take advantage of them. > > * Flags in this category exist to preserve the quirky behavior of the hoisted > > * btrfs clone/dedupe ioctls. > > */ > > Something like "currently we have no such flags, but some will appear > in subsequent commits", removed once such flags do appear, perhaps? Done. --D