From nobody Thu Dec 9 06:11:08 2021 X-Original-To: freebsd-stable@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id ED64D18DC992 for ; Thu, 9 Dec 2021 06:18:42 +0000 (UTC) (envelope-from pmc@citylink.dinoex.sub.org) Received: from uucp.dinoex.org (uucp.dinoex.org [IPv6:2a0b:f840::12]) (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-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "uucp.dinoex.sub.de", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4J8kPY54mmz4dt7 for ; Thu, 9 Dec 2021 06:18:41 +0000 (UTC) (envelope-from pmc@citylink.dinoex.sub.org) Received: from uucp.dinoex.sub.de (uucp.dinoex.org [185.220.148.12]) by uucp.dinoex.org (8.17.1/8.17.1) with ESMTPS id 1B96I5V4095838 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NO) for ; Thu, 9 Dec 2021 07:18:05 +0100 (CET) (envelope-from pmc@citylink.dinoex.sub.org) X-MDaemon-Deliver-To: X-Authentication-Warning: uucp.dinoex.org: Host uucp.dinoex.org [185.220.148.12] claimed to be uucp.dinoex.sub.de Received: (from uucp@localhost) by uucp.dinoex.sub.de (8.17.1/8.17.1/Submit) with UUCP id 1B96I5PE095837 for freebsd-stable@freebsd.org; Thu, 9 Dec 2021 07:18:05 +0100 (CET) (envelope-from pmc@citylink.dinoex.sub.org) Received: from gate.intra.daemon.contact (gate-e [192.168.98.2]) by citylink.dinoex.sub.de (8.16.1/8.16.1) with ESMTP id 1B96Dd3U028952 for ; Thu, 9 Dec 2021 07:13:39 +0100 (CET) (envelope-from peter@gate.intra.daemon.contact) Received: from gate.intra.daemon.contact (gate-e [192.168.98.2]) by gate.intra.daemon.contact (8.16.1/8.16.1) with ESMTPS id 1B96B8cr027681 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NO) for ; Thu, 9 Dec 2021 07:11:08 +0100 (CET) (envelope-from peter@gate.intra.daemon.contact) Received: (from peter@localhost) by gate.intra.daemon.contact (8.16.1/8.16.1/Submit) id 1B96B8xE027680 for freebsd-stable@freebsd.org; Thu, 9 Dec 2021 07:11:08 +0100 (CET) (envelope-from peter) Date: Thu, 9 Dec 2021 07:11:08 +0100 From: Peter To: freebsd-stable@freebsd.org Subject: 12.3: "swapon -a" crashes the system Message-ID: List-Id: Production branch of FreeBSD source code List-Archive: https://lists.freebsd.org/archives/freebsd-stable List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-stable@freebsd.org X-BeenThere: freebsd-stable@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline X-Milter: Spamilter (Reciever: uucp.dinoex.sub.de; Sender-ip: 185.220.148.12; Sender-helo: uucp.dinoex.sub.de;) X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (uucp.dinoex.org [185.220.148.12]); Thu, 09 Dec 2021 07:18:07 +0100 (CET) X-Rspamd-Queue-Id: 4J8kPY54mmz4dt7 X-Spamd-Bar: / Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=none; spf=pass (mx1.freebsd.org: domain of pmc@citylink.dinoex.sub.org designates 2a0b:f840::12 as permitted sender) smtp.mailfrom=pmc@citylink.dinoex.sub.org X-Spamd-Result: default: False [0.48 / 15.00]; ARC_NA(0.00)[]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; R_SPF_ALLOW(-0.20)[+mx]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-stable@freebsd.org]; HAS_XAW(0.00)[]; NEURAL_SPAM_MEDIUM(0.95)[0.946]; RCPT_COUNT_ONE(0.00)[1]; RCVD_COUNT_THREE(0.00)[4]; TO_DN_NONE(0.00)[]; NEURAL_HAM_SHORT(-1.00)[-1.000]; NEURAL_SPAM_LONG(0.84)[0.836]; DMARC_NA(0.00)[sub.org]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:205376, ipnet:2a0b:f840::/32, country:DE]; RCVD_TLS_LAST(0.00)[] X-ThisMailContainsUnwantedMimeParts: N Hija, if you run out of swapspace and you think you might just create some extra devices and add them to /etc/fstab and then run "swapon -a" to enable them, don't do that. The result might look like this: kernel: pid 12296 (daemon), jid 5, uid 5100: exited on signal 10 (core dumped) kernel: pid 17717 (ruby27), jid 5, uid 5100: exited on signal 6 (core dumped) kernel: pid 14938 (daemon), jid 10, uid 5100: exited on signal 10 (core dumped) kernel: pid 19184 (ruby27), jid 10, uid 5100: exited on signal 11 (core dumped) kernel: pid 19182 (ruby27), jid 10, uid 5100: exited on signal 10 (core dumped) ... with a subsequent kernel crash. In my case I did run out of swapspace despite proper sizing, because of unbalanced numa-domains. (Each of them may hit free_target on their own behalf, and then start paging.) So I did as described above, but I added them with the "late" option, and then did run "swapon -a", which did not even add them - but nevertheless produced the crash. The processes that do coredump might be those that are fully swapped out? cheerio, PMc