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[82.29.237.198]) by smtp.gmail.com with ESMTPSA id j2sm2968399wmi.36.2021.08.10.04.28.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 10 Aug 2021 04:28:17 -0700 (PDT) Date: Tue, 10 Aug 2021 12:28:15 +0100 From: "Dr. David Alan Gilbert" To: Samarth Saxena , ben.widawsky@intel.com Subject: Re: [CXL volatile MEM] - Qemu command to turn on HMAT and NUMA fails with assertion Message-ID: References: MIME-Version: 1.0 In-Reply-To: User-Agent: Mutt/2.0.7 (2021-05-04) Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=dgilbert@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Received-SPF: pass client-ip=216.205.24.124; envelope-from=dgilbert@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -34 X-Spam_score: -3.5 X-Spam_bar: --- X-Spam_report: (-3.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.704, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action 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: , Cc: "qemu-devel@nongnu.org" Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" * Samarth Saxena (samarths@cadence.com) wrote: > Hi All, > > I am trying the following command to run Qemu with Kernel 5.14. cc'ing in Ben who I think owns the CXL stuff. > qemu-system-x86_64 -M q35,accel=kvm,nvdimm=on,cxl=on,hmat=on -m 8448M,slots=2,maxmem=16G -smp 8,sockets=2,cores=2,threads=2 -hda /lan/dscratch/singhabh/shradha/ubuntu-20.10-64_with_orig_driver_backup.qcow2 -enable-kvm -usbdevice tablet -L $VB_ROOT/etc/vm/common/ -object memory-backend-ram,id=cxl-ram,share=on,size=256M -device "pxb-cxl,id=cxl.0,bus=pcie.0,bus_nr=52,uid=0,len-window-base=1,window-base[0]=0x4c0000000,memdev[0]=cxl-ram" -device cxl-rp,id=rp0,bus=cxl.0,addr=0.0,chassis=0,slot=0 -device cxl-type3,bus=rp0,memdev=cxl-ram,id=cxl-vmem0,size=256M -numa node,nodeid=0,memdev=cxl-ram -object memory-backend-ram,id=other-ram,size=8G,prealloc=n,share=off -numa node,nodeid=1,memdev=other-ram,initiator=0 -numa cpu,node-id=0,socket-id=0 -numa cpu,node-id=0,socket-id=1 You probably need to state which qemu tree and version you're using here. > I get the following crash before the machine starts to boot. > > qemu-system-x86_64: ../softmmu/memory.c:2443: memory_region_add_subregion_common: Assertion `!subregion->container' failed. It's probably best to check with Ben, but you'll want a backtrace and figure out which subregion and region you're dealing with. Dave > > Please help me find what's wrong here. > > Regards, > [CadenceLogoRed185Regcopy1583174817new51584636989.png] > Samarth Saxena > Sr Principal Software Engineer > T: +911204308300 > [UIcorrectsize1583179003.png] > [16066EmailSignatureFortune100Best2021White92x1271617625037.png] > > > > -- Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK