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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 259BBC25B08 for ; Wed, 17 Aug 2022 16:42:34 +0000 (UTC) Received: from localhost ([::1]:41166 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oOM7l-0008LJ-9B for qemu-devel@archiver.kernel.org; Wed, 17 Aug 2022 12:42:33 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:49200) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oOM0V-0000Dv-6o; Wed, 17 Aug 2022 12:35:05 -0400 Received: from frasgout.his.huawei.com ([185.176.79.56]:2685) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oOM0S-0008TS-71; Wed, 17 Aug 2022 12:35:02 -0400 Received: from fraeml741-chm.china.huawei.com (unknown [172.18.147.206]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4M7Cgf4sGSz67Lkw; Thu, 18 Aug 2022 00:11:26 +0800 (CST) Received: from lhrpeml500005.china.huawei.com (7.191.163.240) by fraeml741-chm.china.huawei.com (10.206.15.222) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Wed, 17 Aug 2022 18:16:20 +0200 Received: from localhost (10.202.226.42) by lhrpeml500005.china.huawei.com (7.191.163.240) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Wed, 17 Aug 2022 17:16:20 +0100 Date: Wed, 17 Aug 2022 17:16:19 +0100 To: Dan Williams CC: Bobo WL , , , Subject: Re: [BUG] cxl can not create region Message-ID: <20220817171619.000021ca@huawei.com> In-Reply-To: <62f5a2ffe8be0_3ce68294a4@dwillia2-xfh.jf.intel.com.notmuch> References: <62f132aee401b_1b3c294c@dwillia2-xfh.jf.intel.com.notmuch> <62f27a8e9acb6_1f18b294e2@dwillia2-xfh.jf.intel.com.notmuch> <62f5a2ffe8be0_3ce68294a4@dwillia2-xfh.jf.intel.com.notmuch> X-Mailer: Claws Mail 4.0.0 (GTK+ 3.24.29; i686-w64-mingw32) MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Originating-IP: [10.202.226.42] X-ClientProxiedBy: lhrpeml100001.china.huawei.com (7.191.160.183) To lhrpeml500005.china.huawei.com (7.191.163.240) X-CFilter-Loop: Reflected Received-SPF: pass client-ip=185.176.79.56; envelope-from=jonathan.cameron@huawei.com; helo=frasgout.his.huawei.com X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Reply-to: Jonathan Cameron From: Jonathan Cameron via On Thu, 11 Aug 2022 17:46:55 -0700 Dan Williams wrote: > Dan Williams wrote: > > Bobo WL wrote: > > > Hi Dan, > > > > > > Thanks for your reply! > > > > > > On Mon, Aug 8, 2022 at 11:58 PM Dan Williams wrote: > > > > > > > > What is the output of: > > > > > > > > cxl list -MDTu -d decoder0.0 > > > > > > > > ...? It might be the case that mem1 cannot be mapped by decoder0.0, or > > > > at least not in the specified order, or that validation check is broken. > > > > > > Command "cxl list -MDTu -d decoder0.0" output: > > > > Thanks for this, I think I know the problem, but will try some > > experiments with cxl_test first. > > Hmm, so my cxl_test experiment unfortunately passed so I'm not > reproducing the failure mode. This is the result of creating x4 region > with devices directly attached to a single host-bridge: > > # cxl create-region -d decoder3.5 -w 4 -m -g 256 mem{12,10,9,11} -s $((1<<30)) > { > "region":"region8", > "resource":"0xf1f0000000", > "size":"1024.00 MiB (1073.74 MB)", > "interleave_ways":4, > "interleave_granularity":256, > "decode_state":"commit", > "mappings":[ > { > "position":3, > "memdev":"mem11", > "decoder":"decoder21.0" > }, > { > "position":2, > "memdev":"mem9", > "decoder":"decoder19.0" > }, > { > "position":1, > "memdev":"mem10", > "decoder":"decoder20.0" > }, > { > "position":0, > "memdev":"mem12", > "decoder":"decoder22.0" > } > ] > } > cxl region: cmd_create_region: created 1 region > > > Did the commit_store() crash stop reproducing with latest cxl/preview > > branch? > > I missed the answer to this question. > > All of these changes are now in Linus' tree perhaps give that a try and > post the debug log again? Hi Dan, I've moved onto looking at this one. 1 HB, 2RP (to make it configure the HDM decoder in the QEMU HB, I'll tidy that up at some stage), 1 switch, 4 downstream switch ports each with a type 3 I'm not getting a crash, but can't successfully setup a region. Upon adding the final target It's failing in check_last_peer() as pos < distance. Seems distance is 4 which makes me think it's using the wrong level of the heirarchy for some reason or that distance check is wrong. Wasn't a good idea to just skip that step though as it goes boom - though stack trace is not useful. Jonathan