From mboxrd@z Thu Jan 1 00:00:00 1970 From: Davidlohr Bueso Subject: tracing get_pages Date: Fri, 17 Feb 2012 23:37:38 +0100 Message-ID: <1329518258.3091.6.camel@offbook> Reply-To: dave@gnu.org Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit To: KVM Return-path: Received: from caiajhbdcbhh.dreamhost.com ([208.97.132.177]:60107 "EHLO homiemail-a37.g.dreamhost.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752747Ab2BQWhl (ORCPT ); Fri, 17 Feb 2012 17:37:41 -0500 Received: from homiemail-a37.g.dreamhost.com (localhost [127.0.0.1]) by homiemail-a37.g.dreamhost.com (Postfix) with ESMTP id 489ED20807F for ; Fri, 17 Feb 2012 14:37:41 -0800 (PST) Received: from [192.168.1.35] (123.Red-79-146-221.dynamicIP.rima-tde.net [79.146.221.123]) (Authenticated sender: smtp@zesaurus.cl) by homiemail-a37.g.dreamhost.com (Postfix) with ESMTPA id 7054120807D for ; Fri, 17 Feb 2012 14:37:40 -0800 (PST) Sender: kvm-owner@vger.kernel.org List-ID: Hi, I'm trying to trace some guest physical pages by running: cmd-trace record -e kvmmmu:kvm_mmu_get_page However, when reporting I'm running into error messages like the following: ... failed to read event print fmt for kvm_emulate_insn Error: expected type 4 but read 7 Error: expected type 5 but read 0 failed to read event print fmt for kvm_userspace_exit CPU 1 is empty CPU 3 is empty CPU 5 is empty CPU 6 is empty CPU 7 is empty cpus=8 ... kvm-4851 [000] 20127.717022: kvm_mmu_get_page: [FAILED TO PARSE] gfn=220672 role=122881 root_count=0 unsync=0 created=1 kvm-4851 [000] 20127.970428: kvm_mmu_get_page: [FAILED TO PARSE] gfn=219136 role=122881 root_count=0 unsync=0 created=1 ... I don't have any problems with other events like pagetable_walk or paging_element. This KVM is from Linus' latest tree, what am I doing wrong? Thanks in advance, Davidlohr