From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx3.redhat.com (mx3.redhat.com [172.16.48.32]) by int-mx1.corp.redhat.com (8.11.6/8.11.6) with ESMTP id j8J1ZOV10702 for ; Sun, 18 Sep 2005 21:35:24 -0400 Received: from zproxy.gmail.com (zproxy.gmail.com [64.233.162.198]) by mx3.redhat.com (8.13.1/8.13.1) with ESMTP id j8J1ZE0J018752 for ; Sun, 18 Sep 2005 21:35:14 -0400 Received: by zproxy.gmail.com with SMTP id m7so495564nzf for ; Sun, 18 Sep 2005 18:35:09 -0700 (PDT) Message-ID: <95bbd1905091818351226a9ec@mail.gmail.com> Date: Mon, 19 Sep 2005 09:35:09 +0800 From: Bear Wolf Subject: Re: [linux-lvm] new process dead after create multiple snapshot volumes In-Reply-To: <20050917191609.GE12882@barkeeper1.linbit> Mime-Version: 1.0 Content-Disposition: inline References: <95bbd190509111934b306235@mail.gmail.com> <20050912080543.GD25756@barkeeper1.linbit> <95bbd19050912014220e457b@mail.gmail.com> <95bbd1905091623272f7455ec@mail.gmail.com> <20050917191609.GE12882@barkeeper1.linbit> Content-Transfer-Encoding: 8bit Reply-To: sportbear@gmail.com, LVM general discussion and development List-Id: LVM general discussion and development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , List-Id: Content-Type: text/plain; charset="us-ascii" To: LVM general discussion and development Thank you Ellenberg. now I learn more things..^_^ should I put this at Redhat Bugzila? because it's always reproducible with RH-FC3, "demsetup resume target &" still not work.. 2005/9/18, Lars Ellenberg : > / 2005-09-17 14:27:10 +0800 > it is not "dead", it is in "uninteruptible sleep". > that is a big difference. > > yes, those are the kernel threads responsible for the sync. > there are initially two of them per cpu. > if they (try to) sync to some device mapper target which is suspended, > they themselves get suspended. > this can hang the system: no io possible, nothing possible > anymore that needs io... > > > -bash-3.00# ps x > > PID TTY STAT TIME COMMAND > > 1 ? S 0:01 init [2] > > 2 ? S 0:00 [migration/0] > > 3 ? SN 0:00 [ksoftirqd/0] > > 4 ? S< 0:00 [events/0] > > 5 ? S< 0:00 [khelper] > > 6 ? S< 0:00 [kthread] > > 8 ? S< 0:00 [kacpid] > > 70 ? S< 0:00 [kblockd/0] > > 73 ? S< 0:00 [khubd] > > 129 ? S 0:00 [pdflush] > > 130 ? D 0:00 [pdflush] > > 132 ? S< 0:00 [aio/0] > > 131 ? S 0:00 [kswapd0] > > 134 ? S< 0:00 [xfslogd/0] > > 133 ? S 0:00 [cifsoplockd] > > 135 ? S< 0:00 [xfsdatad/0] > > 136 ? S 0:00 [xfsbufd] > > 723 ? S< 0:00 [kseriod] > > 773 ? S 0:00 [scsi_eh_0] > > 777 ? S< 0:00 [ata/0] > > 801 ? S< 0:00 [kcryptd/0] > > 934 ? S< 0:00 [kcopyd] > > 1330 ? Ss 0:00 syslogd -m 0 > > 1334 ? Ss 0:00 klogd -x > > 1343 ? Ss 0:00 /usr/httpd/bin/httpd > > 1353 ? Ss 0:00 crond > > 1359 ? Ss 0:00 /bin/profamd > > 1479 tty1 Ss 0:00 -bash > > 1481 tty2 Ss+ 0:00 -bash > > 1483 tty3 Ss+ 0:00 /sbin/mingetty tty3 > > 1485 tty4 Ss+ 0:00 /sbin/mingetty tty4 > > 1487 tty5 Ss+ 0:00 /sbin/mingetty tty5 > > 1903 ? S 0:00 [xfssyncd] > > 1915 tty1 D+ 0:00 sync > > 2037 pts/0 R+ 0:00 ps x > > -- > : Lars Ellenberg Tel +43-1-8178292-0 : > : LINBIT Information Technologies GmbH Fax +43-1-8178292-82 : > : Schoenbrunner Str. 244, A-1120 Vienna/Europe http://www.linbit.com : >