From owner-svn-src-all@freebsd.org Fri Jul 10 09:01:37 2020 Return-Path: Delivered-To: svn-src-all@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id EB05B364630; Fri, 10 Jul 2020 09:01:37 +0000 (UTC) (envelope-from pho@holm.cc) Received: from relay05.pair.com (relay05.pair.com [216.92.24.67]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 4B36V92JZ5z4LyW; Fri, 10 Jul 2020 09:01:36 +0000 (UTC) (envelope-from pho@holm.cc) Received: from x8.osted.lan (5.186.119.8.cgn.fibianet.dk [5.186.119.8]) by relay05.pair.com (Postfix) with ESMTP id EC04D1A2C43; Fri, 10 Jul 2020 05:01:32 -0400 (EDT) Received: from x8.osted.lan (localhost [127.0.0.1]) by x8.osted.lan (8.15.2/8.15.2) with ESMTPS id 06A91VFF035242 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NO); Fri, 10 Jul 2020 11:01:31 +0200 (CEST) (envelope-from pho@x8.osted.lan) Received: (from pho@localhost) by x8.osted.lan (8.15.2/8.15.2/Submit) id 06A91VqJ035241; Fri, 10 Jul 2020 11:01:31 +0200 (CEST) (envelope-from pho) Date: Fri, 10 Jul 2020 11:01:31 +0200 From: Peter Holm To: Mateusz Guzik Cc: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: Re: svn commit: r363069 - head/sys/kern Message-ID: <20200710090131.GA34716@x8.osted.lan> References: <202007100647.06A6lwCE015392@repo.freebsd.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <202007100647.06A6lwCE015392@repo.freebsd.org> X-Rspamd-Queue-Id: 4B36V92JZ5z4LyW X-Spamd-Bar: ---- Authentication-Results: mx1.freebsd.org; none X-Spamd-Result: default: False [-4.00 / 15.00]; ASN(0.00)[asn:7859, ipnet:216.92.0.0/16, country:US]; REPLY(-4.00)[] X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 10 Jul 2020 09:01:38 -0000 On Fri, Jul 10, 2020 at 06:47:58AM +0000, Mateusz Guzik wrote: > Author: mjg > Date: Fri Jul 10 06:47:58 2020 > New Revision: 363069 > URL: https://svnweb.freebsd.org/changeset/base/363069 > > Log: > vfs: depessimize getfsstat when only the count is requested > > This avoids relocking mountlist_mtx for each entry. > > Modified: > head/sys/kern/vfs_syscalls.c > > Modified: head/sys/kern/vfs_syscalls.c > ============================================================================== > --- head/sys/kern/vfs_syscalls.c Fri Jul 10 06:46:42 2020 (r363068) Could this one be yours? 20200710 09:46:31 all (267/723): procfs.sh panic: lock (sleep mutex) mountlist not locked @ kern/vfs_syscalls.c:561 cpuid = 4 time = 1594367192 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe00377a6910 vpanic() at vpanic+0x182/frame 0xfffffe00377a6960 panic() at panic+0x43/frame 0xfffffe00377a69c0 witness_unlock() at witness_unlock+0x147/frame 0xfffffe00377a6a00 __mtx_unlock_flags() at __mtx_unlock_flags+0x4d/frame 0xfffffe00377a6a30 kern_getfsstat() at kern_getfsstat+0x40b/frame 0xfffffe00377a6ab0 sys_getfsstat() at sys_getfsstat+0x22/frame 0xfffffe00377a6ad0 amd64_syscall() at amd64_syscall+0x159/frame 0xfffffe00377a6bf0 fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe00377a6bf0 --- syscall (557, FreeBSD ELF64, sys_getfsstat), rip = 0x80032db1a, rsp = 0x7fffffffd738, rbp = 0x7fffffffd790 --- KDB: enter: panic https://people.freebsd.org/~pho/stress/log/mjguzik030.txt - Peter