Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753883Ab3J3LNW (ORCPT ); Wed, 30 Oct 2013 07:13:22 -0400 Received: from smtp02.citrix.com ([66.165.176.63]:42884 "EHLO SMTP02.CITRIX.COM" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751982Ab3J3LNU (ORCPT ); Wed, 30 Oct 2013 07:13:20 -0400 X-IronPort-AV: E=Sophos;i="4.93,600,1378857600"; d="scan'208";a="66206649" Date: Wed, 30 Oct 2013 11:13:18 +0000 From: Wei Liu To: Zoltan Kiss CC: , , , , , Subject: Re: [PATCH net-next RFC 3/5] xen-netback: Remove old TX grant copy definitons Message-ID: <20131030111318.GO5221@zion.uk.xensource.com> References: <1383094220-14775-1-git-send-email-zoltan.kiss@citrix.com> <1383094220-14775-4-git-send-email-zoltan.kiss@citrix.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <1383094220-14775-4-git-send-email-zoltan.kiss@citrix.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-DLP: MIA2 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 717 Lines: 20 On Wed, Oct 30, 2013 at 12:50:18AM +0000, Zoltan Kiss wrote: > These became obsolate with grant mapping. > I'm afraid not. This TX coalescing mechanism is designed to handle the situation where guest's MAX_SKB_FRAGS > host's MAX_SKB_FRAGS. To a further extent, I think you might need to add mechanism for backend to tell frontend how many frags it can handle, and frontend needs to do necessary coalescing. Until then you can safely use this new mapping scheme. Wei. -- 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/