From owner-freebsd-hackers@freebsd.org Tue Apr 9 00:57:34 2019 Return-Path: Delivered-To: freebsd-hackers@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 4DF1A156E6CA for ; Tue, 9 Apr 2019 00:57:34 +0000 (UTC) (envelope-from asomers@gmail.com) Received: from mail-lf1-f47.google.com (mail-lf1-f47.google.com [209.85.167.47]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "GTS CA 1O1" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 59DC76C8F8 for ; Tue, 9 Apr 2019 00:57:33 +0000 (UTC) (envelope-from asomers@gmail.com) Received: by mail-lf1-f47.google.com with SMTP id z9so2363304lfh.6 for ; Mon, 08 Apr 2019 17:57:33 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=6tYkh06C+IfGlzzHjar6/rjP/UWC5vgLBsCmdXXKJu0=; b=uf461w3Nclh75ncsgXHH+5ZcvLeLUbD9uuyarH4xpuJ2PLQaTTB8FFcVhRZVHwdEU1 V4j/LVVaSxSPRGE8L3c2Lgjh7BcKRT3zgi/zpMRmUt/qbisduGT/9Ko4bODS+IrwSfG+ 2rdd374WRtvD9GSDl+cF3f9vB3eGHlJ6IzewLL8t8457u5fRgELgZgPuDBej2z1Bf83F Um4mAvlGlYaLKtG2JdBwdYYEMZeKUyimzTdvmlBXiyGAJMG/NAN+bJBCtHqHev3LWMaD aydmYiB+sviLnFBRh6cbbl6VAHeqJycwZPWi920F+yUMfStEHtwfAuSEz49daUJ213nN 521g== X-Gm-Message-State: APjAAAVFu6IRQb75v+kQbr1hkBrYUw6lqnzoiVhBKkHRWXsG2IUnFdjx lJV/ht3C1lUfbjhmk9dR7xJapxmLeGkU1eU2bbN3RHjPaLM= X-Google-Smtp-Source: APXvYqxnl43ZcUrMvx+O4cHbxeG/aqPvbnM2DgxDbYWjmvS0q5V5UcgkVwYblxrcs5O5myMJ3nXy50+wYxDnl9ioQbQ= X-Received: by 2002:a05:6512:248:: with SMTP id b8mr17075981lfo.140.1554771095365; Mon, 08 Apr 2019 17:51:35 -0700 (PDT) MIME-Version: 1.0 From: Alan Somers Date: Mon, 8 Apr 2019 18:51:23 -0600 Message-ID: Subject: panic: leaf should be empty To: FreeBSD Hackers X-Rspamd-Queue-Id: 59DC76C8F8 X-Spamd-Bar: ---- Authentication-Results: mx1.freebsd.org; spf=pass (mx1.freebsd.org: domain of asomers@gmail.com designates 209.85.167.47 as permitted sender) smtp.mailfrom=asomers@gmail.com X-Spamd-Result: default: False [-4.14 / 15.00]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; RCVD_COUNT_TWO(0.00)[2]; FROM_HAS_DN(0.00)[]; R_SPF_ALLOW(-0.20)[+ip4:209.85.128.0/17]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_GOOD(-0.10)[multipart/alternative,text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-hackers@freebsd.org]; DMARC_NA(0.00)[freebsd.org]; RCPT_COUNT_ONE(0.00)[1]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; MIME_TRACE(0.00)[0:+,1:+]; TO_DN_ALL(0.00)[]; MX_GOOD(-0.01)[cached: alt3.gmail-smtp-in.l.google.com]; NEURAL_HAM_SHORT(-0.79)[-0.792,0]; RCVD_IN_DNSWL_NONE(0.00)[47.167.85.209.list.dnswl.org : 127.0.5.0]; RCVD_TLS_LAST(0.00)[]; FORGED_SENDER(0.30)[asomers@freebsd.org,asomers@gmail.com]; R_DKIM_NA(0.00)[]; FREEMAIL_ENVFROM(0.00)[gmail.com]; ASN(0.00)[asn:15169, ipnet:209.85.128.0/17, country:US]; FROM_NEQ_ENVFROM(0.00)[asomers@freebsd.org,asomers@gmail.com]; IP_SCORE(-1.34)[ip: (-0.59), ipnet: 209.85.128.0/17(-3.87), asn: 15169(-2.18), country: US(-0.06)]; TO_DOM_EQ_FROM_DOM(0.00)[] Content-Type: text/plain; charset="UTF-8" X-Content-Filtered-By: Mailman/MimeDel 2.1.29 X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 09 Apr 2019 00:57:34 -0000 I'm trying to use cache_enter_timeout to set a timeout on a lookup cache entry. I have code that works with cache_enter, but when I modify it to use cache_enter_timeout I get this panic message on a subsequent lookup. Does anybody know the magic incantation to using lookup cache timeouts? The panic message is not very helpful. Stack trace: panic: leaf should be empty cpuid = 2 time = 1554770500 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe0031c745f0 vpanic() at vpanic+0x19d/frame 0xfffffe0031c74640 panic() at panic+0x43/frame 0xfffffe0031c746a0 lookup() at lookup+0xe69/frame 0xfffffe0031c74740 namei() at namei+0x4e9/frame 0xfffffe0031c74830 kern_accessat() at kern_accessat+0x106/frame 0xfffffe0031c74990 amd64_syscall() at amd64_syscall+0x276/frame 0xfffffe0031c74ab0 fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe0031c74ab0 --- syscall (33, FreeBSD ELF64, sys_access), rip = 0x80051696a, rsp = 0x7fffffffe5e8, rbp = 0x7fffffffe780 --- Steps to Reproduce: 1) Build and install a kernel and tests from the projects/fuse2 branch at r346046 or later 2) cd /usr/tests/sys/fs/fusefs 3) ./lookup --gtest_filter=Lookup.entry_cache -vv # This should work 4) sudo sysctl vfs.fusefs.lookup_cache_expire=1 5) ./lookup --gtest_filter=Lookup.entry_cache -vv # This should panic The offending code is in sys/fs/fuse/fuse_node.c at line 308. Grateful for any help, -Alan