From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Darrick J. Wong" Subject: [PATCH] ioctl_ficlonerange.2/ioctl_fideduperange.2: mention same-fs requirement Date: Wed, 8 Jun 2016 09:40:40 -0700 Message-ID: <20160608164040.GB5740@birch.djwong.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline Sender: linux-man-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: mtk.manpages-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org Cc: linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, hch-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org, linux-man-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-man@vger.kernel.org Mention that FICLONE, FICLONERANGE, and FIDEDUPERANGE all require both files to reside on the same filesystem. Signed-off-by: Darrick J. Wong --- man2/ioctl_ficlonerange.2 | 1 + man2/ioctl_fideduperange.2 | 1 + 2 files changed, 2 insertions(+) diff --git a/man2/ioctl_ficlonerange.2 b/man2/ioctl_ficlonerange.2 index 0cb1567..c6e0762 100644 --- a/man2/ioctl_ficlonerange.2 +++ b/man2/ioctl_ficlonerange.2 @@ -36,6 +36,7 @@ file appear in the .I dest_fd file by sharing the underlying storage, which is faster than making a separate physical copy of the data. +Both files must reside within the same filesystem. If a file write should occur to a shared region, the filesystem must ensure that the changes remain private to the file being written. diff --git a/man2/ioctl_fideduperange.2 b/man2/ioctl_fideduperange.2 index c69f8c5..44a7765 100644 --- a/man2/ioctl_fideduperange.2 +++ b/man2/ioctl_fideduperange.2 @@ -34,6 +34,7 @@ file appear in the .B dest_fd file by sharing the underlying storage if the file data is identical ("deduplication"). +Both files must reside within the same filesystem. This reduces storage consumption by allowing the filesystem to store one shared copy of the data. If a file write should occur to a shared -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html