From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752735AbaCXJ0v (ORCPT ); Mon, 24 Mar 2014 05:26:51 -0400 Received: from smtp.citrix.com ([66.165.176.89]:29030 "EHLO SMTP.CITRIX.COM" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750998AbaCXJ0u (ORCPT ); Mon, 24 Mar 2014 05:26:50 -0400 X-IronPort-AV: E=Sophos;i="4.97,719,1389744000"; d="scan'208";a="114239594" Message-ID: <1395653207.19365.1.camel@kazak.uk.xensource.com> Subject: Re: [PATCH net-next] Revert "xen-netback: Aggregate TX unmap operations" From: Ian Campbell To: Zoltan Kiss CC: , , , , , Date: Mon, 24 Mar 2014 09:26:47 +0000 In-Reply-To: <1395422584-16213-1-git-send-email-zoltan.kiss@citrix.com> References: <1395422584-16213-1-git-send-email-zoltan.kiss@citrix.com> Organization: Citrix Systems, Inc. Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.4.4-3 MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Originating-IP: [10.80.2.80] X-DLP: MIA2 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 2014-03-21 at 17:23 +0000, Zoltan Kiss wrote: > This reverts commit e9275f5e2df1b2098a8cc405d87b88b9affd73e6. This commit is the > last in the netback grant mapping series, and it tries to do more aggressive > aggreagtion of unmap operations. However practical use showed almost no > positive effect, whilst with certain frontends it causes significant performance > regression. That's a shame -- do you have any insight into why? > Signed-off-by: Zoltan Kiss Acked-by: Ian Campbell