From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C2DC2C43603 for ; Mon, 16 Dec 2019 02:35:50 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 8E8DB206D7 for ; Mon, 16 Dec 2019 02:35:50 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8E8DB206D7 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:45528 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iggEf-0004do-PT for qemu-devel@archiver.kernel.org; Sun, 15 Dec 2019 21:35:49 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:36282) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iggE1-00047h-Lq for qemu-devel@nongnu.org; Sun, 15 Dec 2019 21:35:10 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iggE0-00010B-Ja for qemu-devel@nongnu.org; Sun, 15 Dec 2019 21:35:09 -0500 Received: from mga05.intel.com ([192.55.52.43]:60978) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iggE0-0000xX-Bt for qemu-devel@nongnu.org; Sun, 15 Dec 2019 21:35:08 -0500 X-Amp-Result: UNKNOWN X-Amp-Original-Verdict: FILE UNKNOWN X-Amp-File-Uploaded: False Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga105.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 15 Dec 2019 18:35:05 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.69,320,1571727600"; d="scan'208";a="389313356" Received: from richard.sh.intel.com (HELO localhost) ([10.239.159.54]) by orsmga005.jf.intel.com with ESMTP; 15 Dec 2019 18:35:04 -0800 Date: Mon, 16 Dec 2019 10:35:02 +0800 From: Wei Yang To: Wei Yang Subject: Re: [Patch v2 0/6] migration/postcopy: enable compress during postcopy Message-ID: <20191216023502.GA21865@richard> References: <20191107123907.29791-1-richardw.yang@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20191107123907.29791-1-richardw.yang@linux.intel.com> User-Agent: Mutt/1.9.4 (2018-02-28) X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 192.55.52.43 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Wei Yang Cc: qemu-devel@nongnu.org, dgilbert@redhat.com, quintela@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Would this one be picked up in this version? On Thu, Nov 07, 2019 at 08:39:01PM +0800, Wei Yang wrote: >This patch set tries enable compress during postcopy. > >postcopy requires to place a whole host page, while migration thread migrate >memory in target page size. This makes postcopy need to collect all target >pages in one host page before placing via userfaultfd. > >To enable compress during postcopy, there are two problems to solve: > > 1. Random order for target page arrival > 2. Target pages in one host page arrives without interrupt by target > page from other host page > >The first one is handled by counting the number of target pages arrived >instead of the last target page arrived. > >The second one is handled by: > > 1. Flush compress thread for each host page > 2. Wait for decompress thread for before placing host page > >With the combination of these two changes, compress is enabled during >postcopy. > >--- >v2: > * use uintptr_t to calculate place_dest > * check target pages belongs to the same host page > >Wei Yang (6): > migration/postcopy: reduce memset when it is zero page and > matches_target_page_size > migration/postcopy: wait for decompress thread in precopy > migration/postcopy: count target page number to decide the > place_needed > migration/postcopy: set all_zero to true on the first target page > migration/postcopy: enable random order target page arrival > migration/postcopy: enable compress during postcopy > > migration/migration.c | 11 ------- > migration/ram.c | 67 +++++++++++++++++++++++++++++++++---------- > 2 files changed, 52 insertions(+), 26 deletions(-) > >-- >2.17.1 -- Wei Yang Help you, Help me