From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from wout1-smtp.messagingengine.com (wout1-smtp.messagingengine.com [64.147.123.24]) by sourceware.org (Postfix) with ESMTPS id 7049E3858418 for ; Fri, 1 Apr 2022 20:13:39 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 7049E3858418 Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=serhei.io Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=serhei.io Received: from compute5.internal (compute5.nyi.internal [10.202.2.45]) by mailout.west.internal (Postfix) with ESMTP id A360E3201D90; Fri, 1 Apr 2022 16:13:36 -0400 (EDT) Received: from imap50 ([10.202.2.100]) by compute5.internal (MEProxy); Fri, 01 Apr 2022 16:13:36 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=serhei.io; h=cc :content-type:date:date:from:from:in-reply-to:in-reply-to :message-id:mime-version:references:reply-to:sender:subject :subject:to:to; s=fm1; bh=pp/N2r/qwSd7S2/sO+tkEaHdb7FMVDFIVfey06 CfGqc=; b=KRLrqYs39yQ3rdK2X/lJzqHeIwSg5rK/eC88uwNhAkr25u7443dt5w ak76q5zWZOtaW7Pa1x6Ru4wht5e6LAfGtpz+qznQ4RqcWW0rqK3M2taoB6jnHi6F qvXwTeu9lmW37ALvbbqEV7mGH44R6yholWIQ9k3DePnrJ6cRg7tXyQydrXNdp8i7 P88V323R6vIC7xmMHJC3chgnXdDezbjGVWKkQqy3aXjZhfBvX9czZJ/cfq4Nz9Ew lJdeernWTp93DEiqMmkyJK2prCDDmir1HKSmfoOVxIzI+UkWTYZan6+lr7btG1b+ ArkKelFIpGPPGTr0GAXgLr6/Hy8kgohQ== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-type:date:date:from:from :in-reply-to:in-reply-to:message-id:mime-version:references :reply-to:sender:subject:subject:to:to:x-me-proxy:x-me-proxy :x-me-sender:x-me-sender:x-sasl-enc; s=fm3; bh=pp/N2r/qwSd7S2/sO +tkEaHdb7FMVDFIVfey06CfGqc=; b=nDC88UhMULQtnLUtdlINfKyjrAQ96hFdt tWbdDE+tzS6qbpu+etKK61pxM6tjXWNOSksvyaaNTYWOR25czrjnv+SVeHm0r3ec TDxzmSEHW2XXaVWb4n+bwCsDYB775K2AHbXEgnb4Iyrjs4o8Mlnk1xk04jlxzya8 mZI6QRQ/kanRFnyHgFD4QhcPG5DoVXwWiK8m4oFgf4JhvFnyaq2hZL6veWsDVKpD SndpxlgSGshfMI4Ot5O8KjoHkS4s5bpd2+13CWneeb5eRET7GYXTlPuhDHWzuYVr RKt2PeKtww+iBNw2382j7GTiTW6pMa2ZMPm7kSmG4fCyeFphKza9A== X-ME-Sender: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvvddrudeiiedgudegiecutefuodetggdotefrod ftvfcurfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfgh necuuegrihhlohhuthemuceftddtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmd enucfjughrpefofgggkfgjfhffhffvufgtsehttdertderredtnecuhfhrohhmpedfufgv rhhhvghiucforghkrghrohhvfdcuoehmvgesshgvrhhhvghirdhioheqnecuggftrfgrth htvghrnheptdeuveeuvdfgleektdettedvkeegudekffehfeegleeuudfgieffveduveeu feeinecuffhomhgrihhnpehfohhprdhophgvnhenucevlhhushhtvghrufhiiigvpedtne curfgrrhgrmhepmhgrihhlfhhrohhmpehmvgesshgvrhhhvghirdhioh X-ME-Proxy: Received: by mailuser.nyi.internal (Postfix, from userid 501) id 09F52192008C; Fri, 1 Apr 2022 16:13:36 -0400 (EDT) X-Mailer: MessagingEngine.com Webmail Interface User-Agent: Cyrus-JMAP/3.7.0-alpha0-382-g88b93171a9-fm-20220330.001-g88b93171 Mime-Version: 1.0 Message-Id: <9adcadfd-e6ba-4c0b-8e64-892ec7173bac@www.fastmail.com> In-Reply-To: <6a4c5961-df38-40d6-9491-1f5a587a3dbf@www.fastmail.com> References: <6a4c5961-df38-40d6-9491-1f5a587a3dbf@www.fastmail.com> Date: Fri, 01 Apr 2022 16:13:15 -0400 From: "Serhei Makarov" To: "Daire Byrne" , systemtap Subject: Re: newer kernel+systemtap & nfs.fop.open Content-Type: text/plain X-Spam-Status: No, score=-3.2 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, JMQ_SPF_NEUTRAL, RCVD_IN_DNSWL_LOW, RCVD_IN_MSPIKE_H5, RCVD_IN_MSPIKE_WL, SPF_HELO_PASS, SPF_PASS, TXREP, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.4 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on server2.sourceware.org X-BeenThere: systemtap@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Systemtap mailing list List-Unsubscribe: , List-Archive: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 01 Apr 2022 20:13:41 -0000 On Fri, Apr 1, 2022, at 10:55 AM, Serhei Makarov wrote: > In this case the last commit > to tapsets/linux/dentry.stp was in 2020 > so it looks like we may have some catching up to the kernel > to do. I'll investigate more (i.e. delve into kernel git history) > and get back to you. I'm got a 'read fault' running your example on Fedora 5.15.4-201.fc35.x86_64, which indicates even further divergence later on. Which kernel version were you running the example on? Looks like "struct mount" no longer defines the "mnt_parent" member used by task_dentry_path() tapset function in /usr/share/systemtap/tapset/linux/dentry.stp which is strange as the upstream Linux kernel code still uses that member in the equivalent fs/d_path.c __prepend_path code. sutap -ve 'probe begin { if (@type_member_defined("mount", mnt_parent)) { print("foo") } else { print("bar") } exit() }' Very strange, as even checking the debugsource doesn't show any downstream changes as found by $ debuginfod-find source /boot/vmlinuz-5.15.4-201.fc35.x86_64 /usr/src/debug/kernel-5.15.4/linux-5.15.4-201.fc35.x86_64/fs/d_path.c I'm also confused and will continue investigating until I become unconfused.