From owner-freebsd-current@FreeBSD.ORG Sun Feb 22 17:34:35 2015 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 959A3D86 for ; Sun, 22 Feb 2015 17:34:35 +0000 (UTC) Received: from mail.ignoranthack.me (ignoranthack.me [199.102.79.106]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 73DC1CF3 for ; Sun, 22 Feb 2015 17:34:35 +0000 (UTC) Received: from [192.168.200.212] (unknown [50.136.155.142]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: sbruno@ignoranthack.me) by mail.ignoranthack.me (Postfix) with ESMTPSA id 1649E192A3B; Sun, 22 Feb 2015 17:34:30 +0000 (UTC) Message-ID: <54EA1325.6070009@ignoranthack.me> Date: Sun, 22 Feb 2015 09:34:29 -0800 From: Sean Bruno Reply-To: sbruno@freebsd.org User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:31.0) Gecko/20100101 Thunderbird/31.4.0 MIME-Version: 1.0 To: Konstantin Belousov Subject: Re: panic on application core dump? References: <54E8EA2A.7020904@ignoranthack.me> <20150221211712.GG74514@kib.kiev.ua> In-Reply-To: <20150221211712.GG74514@kib.kiev.ua> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Cc: FreeBSD current X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 22 Feb 2015 17:34:35 -0000 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 > Err. Is it easily reproducable in your setup ? The core file vnode > is indeed unreferenced before notification is sent. > > Try this. > > diff --git a/sys/kern/kern_sig.c b/sys/kern/kern_sig.c index > 41da3dd..57f66b0 100644 Restarted my non-deterministic test case. Three instances of qemu core dumped and the system did *not* panic. However, this appears to be interfering with signal handling and reaping. Applications seems to stall out and become unkillable/unreapable. I have to reboot the system via panic/reset. sean last pid: 41009; load averages: 0.46, 0.29, 0.21 up 0+12:18:57 17:33:37 72 processes: 1 running, 69 sleeping, 2 zombie CPU: 0.9% user, 0.0% nice, 0.2% system, 0.0% interrupt, 98.8% idle Mem: 15M Active, 6675M Inact, 7201M Wired, 244K Cache, 2010M Free ARC: 4678M Total, 910M MFU, 3001M MRU, 6748K Anon, 70M Header, 691M Other Swap: 16G Total, 16G Free PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU COMMAND 718 www 1 20 0 28708K 6636K kqread 12 0:08 0.70% nginx 1430 root 1 52 0 17180K 3448K wait 13 2:28 0.44% sh 1276 sbruno 1 20 0 21548K 8796K select 11 4:37 0.17% tmux 40832 root 1 20 0 22000K 3072K CPU7 7 0:00 0.08% top 1267 sbruno 1 20 0 86528K 7580K select 15 0:04 0.02% sshd 695 root 1 20 0 25496K 4884K select 9 0:03 0.01% ntpd 698 root 1 20 0 14492K 1992K select 7 0:04 0.01% powerd 1288 root 1 20 0 17180K 5336K zfs 14 1:13 0.00% sh 79939 root 1 52 0 17180K 3384K wait 10 0:03 0.00% sh 750 root 1 20 0 24164K 5444K select 2 0:01 0.00% sendmail 444 unbound 1 20 0 34780K 9672K select 7 0:00 0.00% unbound 40727 root 1 20 0 17180K 5276K wait 14 0:00 0.00% sh 68893 root 1 26 0 17180K 5336K wait 3 0:00 0.00% sh 80937 root 1 24 0 17180K 5336K wait 13 0:00 0.00% sh 55102 root 1 24 0 17180K 5336K wait 3 0:00 0.00% sh 35713 root 1 25 0 17180K 5336K wait 10 0:00 0.00% sh 48828 root 1 24 0 17180K 5336K wait 6 0:00 0.00% sh 97473 root 1 26 0 17180K 5336K wait 0 0:00 0.00% sh 64113 root 1 24 0 17180K 5336K wait 5 0:00 0.00% sh 46980 root 1 27 0 17180K 5336K wait 12 0:00 0.00% sh 80439 root 1 24 0 17180K 5336K wait 7 0:00 0.00% sh 44960 root 1 20 0 17180K 5276K wait 3 0:00 0.00% sh 49661 root 1 27 0 17180K 5336K wait 8 0:00 0.00% sh 78496 root 1 52 0 17180K 5336K zfs 0 0:00 0.00% sh 69491 root 1 27 0 17180K 5336K wait 6 0:00 0.00% sh 75907 root 1 52 0 17180K 5336K zfs 8 0:00 0.00% sh 534 root 1 20 0 14524K 2200K select 12 0:00 0.00% syslogd 757 root 1 52 0 16620K 2296K nanslp 13 0:00 0.00% cron 747 root 1 20 0 59148K 6620K select 6 0:00 0.00% sshd 26179 root 1 31 0 23652K 4044K pause 14 0:00 0.00% csh 79371 root 1 20 0 17180K 5336K wait 9 0:00 0.00% sh 1268 sbruno 1 23 0 23652K 3736K pause 5 0:00 0.00% tcsh 1265 root 1 22 0 86528K 7284K select 11 0:00 0.00% sshd 1283 root 1 21 0 23652K 4044K pause 3 0:00 0.00% csh 1277 sbruno 1 23 0 23652K 3748K pause 6 0:00 0.00% tcsh 1282 sbruno 1 21 0 74188K 6348K wait 11 0:00 0.00% su 24565 sbruno 1 20 0 23652K 3740K pause 8 0:00 0.00% tcsh 438 root 1 20 0 13588K 4788K select 11 0:00 0.00% devd 26119 sbruno 1 20 0 74188K 6348K wait 13 0:00 0.00% su 753 smmsp 1 20 0 24164K 5392K pause 1 0:00 0.00% sendmail -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQF8BAEBCgBmBQJU6hMhXxSAAAAAAC4AKGlzc3Vlci1mcHJAbm90YXRpb25zLm9w ZW5wZ3AuZmlmdGhob3JzZW1hbi5uZXRCQUFENDYzMkU3MTIxREU4RDIwOTk3REQx MjAxRUZDQTFFNzI3RTY0AAoJEBIB78oecn5k6sUIALJrfTWiIC2EeAuV/aedWGuM 6XP97oXAp3iFNEyz/4yli6Hoev7AG9lbxh/ruhzKUi1O5tGQye0gIBwdqGrOL5tA mEjS8EAylc2WJsPbOHnctT/JUgaOle5j4HTlV8r7t8XSPjjoktc9uBwQQ7n+XlI3 AK4aOspxZSTk7WaGWM5cBDHV/Ga+6VgFGXi6i2/Y9zpW93vuCCCDfvpyQqGOoAGq LJk9hZmDdJMBO6n0HbPm20xKv0lDQsK9HIx2grD7xz5FPwVOFTMHwQrgnEqlpTPq b1Aex0MPqSTaUlZs8W6jY5C9ze8FEbLG15E0zj1ZMISPVJwrH7XPP8Jq57BqVo0= =JrKS -----END PGP SIGNATURE-----