Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752103Ab0KYKTn (ORCPT ); Thu, 25 Nov 2010 05:19:43 -0500 Received: from mail-iw0-f174.google.com ([209.85.214.174]:53299 "EHLO mail-iw0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751564Ab0KYKTl (ORCPT ); Thu, 25 Nov 2010 05:19:41 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:from:date:message-id:subject:to:content-type; b=J09v4DcHhkDky+H+rFaIE14XJ/e3OjNX+CGHZS9/Jee93gk/ry5hOxDk9SRrF1D1rW uFOUgcjFVVjHkGSgvso6GxuWfkuYK9nzssVtp6aW+P4cxBgg9rJClVDsKTLhFcYihZ2C gZGwT8haOo8yVbhXfAU5ohmL/DBicB4lMG9i8= MIME-Version: 1.0 From: David Nicol Date: Thu, 25 Nov 2010 04:19:17 -0600 Message-ID: Subject: VFS support for fast copy on deduplicating FSes To: Linux Kernel Mailing List , BTRFS MAILING LIST Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 557 Lines: 14 unresearched question/suggestion: Is there general support for a "fast copy" ioctl in the VFS layer, which would be hooked by file systems that support COW or other forms of deduplication and can provide copy semantics by manipulating metadata only? -- "It is merely a matter of persistence." -- Albert Camus -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/