From owner-freebsd-hackers@freebsd.org Sun Apr 8 08:14:17 2018 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 9C636F8D5D0 for ; Sun, 8 Apr 2018 08:14:17 +0000 (UTC) (envelope-from joel.bertrand@systella.fr) Received: from rayleigh.systella.fr (newton-ipv6.systella.fr [IPv6:2001:7a8:a8ed:253::1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "rayleigh.systella.fr", Issuer "rayleigh.systella.fr" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 1EC17823AF for ; Sun, 8 Apr 2018 08:14:16 +0000 (UTC) (envelope-from joel.bertrand@systella.fr) Received: from [192.168.10.103] (hilbert.systella.fr [192.168.10.103]) (authenticated bits=0) by rayleigh.systella.fr (8.15.2/8.15.2/Debian-10) with ESMTPSA id w388E3D4029560 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Sun, 8 Apr 2018 10:14:03 +0200 Subject: Re: [diskless] pkg takes 100% of a CPU To: freebsd-hackers@freebsd.org References: <201804071708.w37H8Ts8009359@pdx.rh.CN85.dnsmgr.net> From: =?UTF-8?Q?BERTRAND_Jo=c3=abl?= Openpgp: preference=signencrypt Autocrypt: addr=joel.bertrand@systella.fr; 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Linux x86_64; rv:52.0) Gecko/20100101 Firefox/52.0 SeaMonkey/2.49.2 MIME-Version: 1.0 In-Reply-To: <201804071708.w37H8Ts8009359@pdx.rh.CN85.dnsmgr.net> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Virus-Scanned: clamav-milter 0.100.0-beta at rayleigh X-Virus-Status: Clean X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 08 Apr 2018 08:14:17 -0000 Rodney W. Grimes a écrit : >> On Sat, 2018-04-07 at 07:35 -0700, Rodney W. Grimes wrote: >>>> >>>> On Sat, 2018-04-07 at 11:50 +0200, BERTRAND Jol wrote: >>>>> >>>>> Steven Hartland a crit: >>>>>> >>>>>> >>>>>> When we?ve seen it using 100% it?s been doing comprehension stuff which >>>>>> usually finishes you just have to wait. Not sure if that?s what you?re >>>>>> seeing? >>>>> Yesterday, I have killed pkg after more than 100 hours of CPU time... >>>>> >>>>> Best regards, >>>>> >>>>> JB >>>> For me, pkg(8) quit working on systems that have /var/db mounted from >>>> nfs long ago, maybe as much as a year ago at this point. I mentioned >>>> it on irc, and was told "It's probably something to do with locking", >>>> but I already have boot.nfsroot.options="nolockd" in loader.conf >>>> (because that's pretty much the only option because the rc(8) system >>>> was broken years ago when it comes to nfsroot). >>> My understanding of the current broken state of afairs is that pkg >>> does not work over nfs unless you have proper and full lockd support, >>> AND set NFS_WITH_PROPER_LOCKING in pkg's environment.??This really >>> really really just needs to work without a lot of fuss out of the >>> box. >>> >> >> nfs locking support is compiled into the kernel on both the server and >> client side, and rpc.lockd is running on both, but there is no need for >> actual locking on the mount because the rootfs isn't accessed by >> multiple clients at once -- each of my arm boards has its own private >> rootfs exported from the server. I'm pretty sure I tried remounting >> root > > pkg wants to do locking, multiple copies of pkg may be running on one > client, you might get pkg to work for you if you do the > > echo "NFS_WITH_PROPER_LOCKING = true;" >> /usr/local/etc/pkg.conf Of course, I have set this line in /usr/local/etc/pkg.conf. I cannot attach pkg to gdb : root@pythagore:~ # gdb -p 75520 GNU gdb 6.1.1 [FreeBSD] ......... This GDB was configured as "amd64-marcel-freebsd". Attaching to process 75520 /usr/src/contrib/gdb/gdb/solib-svr4.c:1444: internal-error: legacy_fetch_link_map_offsets called without legacy link_map support enabled. A problem internal to GDB has been detected, further debugging may prove unreliable. pkg seems to be called by /usr/local/sbin/pkgcheck-qsa I have killed pkg with -SEGV but I'm unable to find core file. Best regards, JB